CN112131745A - Fishway experiment system based on virtual simulation platform - Google Patents
Fishway experiment system based on virtual simulation platform Download PDFInfo
- Publication number
- CN112131745A CN112131745A CN202011014060.0A CN202011014060A CN112131745A CN 112131745 A CN112131745 A CN 112131745A CN 202011014060 A CN202011014060 A CN 202011014060A CN 112131745 A CN112131745 A CN 112131745A
- Authority
- CN
- China
- Prior art keywords
- fishway
- water
- fish
- flow
- experimental
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2111/00—Details relating to CAD techniques
- G06F2111/10—Numerical modelling
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/20—Design reuse, reusability analysis or reusability optimisation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/60—Ecological corridors or buffer zones
Abstract
The invention provides a fishway experiment system based on a virtual simulation platform, which comprises an engineering brief introduction module, an experiment preview module, an examination mode module and an experiment report module; the using method comprises the following steps: step one, applying for a virtual account number from a preset website by a mailbox and then logging in a virtual simulation platform; step two, learning knowledge required by the experiment is carried out through an engineering brief introduction module; thirdly, the experiment operation steps are previewed through an experiment previewing module; step four, carrying out a virtual simulation fishway experiment through an examination mode module; filling and submitting an experiment report through an experiment report module; the invention can be used for fishway simulation experiments and helps to efficiently construct ecological fishways, and aims to reduce the waste of capital and time in model installation of the traditional fishway experiments and reduce the model manufacturing cost.
Description
Technical Field
The invention relates to the technical field of ecological restoration, in particular to a fishway experiment system based on a virtual simulation platform.
Background
While the water conservancy project makes great contribution in flood control, power generation, irrigation and the like, the problem of river ecological damage is caused, such as blocking of a river ecological longitudinal corridor, influence on the original river water biological habitat environment, obstruction of fish migration and damage of the diversity development of the river water ecological environment. The fishway is generally regarded as an effective engineering construction for river water ecological protection and restoration in new water conservancy engineering construction. In the traditional fishway model experiment, the scale relation of the model is large, the single experiment scale is large, and the dependence of experiment hardware is strong, so that a large amount of funds and time can be wasted in model installation. And the fishway structure selection is related to in the fishway experiment, the model installation difficulty of different structures is great, the cost is high, and the time is consumed, so that the fishway form is single, the selection of various fishway types in the experiment process cannot be met, and the relation between the structure and water flow cannot be specifically related.
Disclosure of Invention
The invention provides a fishway experiment system based on a virtual simulation platform, which can be used for fishway simulation experiments and help to efficiently construct ecological fishways and aims to reduce the waste of funds and time in model installation of the traditional fishway experiments and reduce the model manufacturing cost.
The invention adopts the following technical scheme.
A fishway experiment system based on a virtual simulation platform comprises an engineering brief introduction module, an experiment preview module, an examination mode module and an experiment report module; the using method comprises the following steps:
step one, applying for a virtual account number from a preset website by a mailbox and then logging in a virtual simulation platform;
step two, learning knowledge required by the experiment is carried out through an engineering brief introduction module;
thirdly, the experiment operation steps are previewed through an experiment previewing module;
step four, carrying out a virtual simulation fishway experiment through an examination mode module;
and fifthly, filling and submitting the experiment report through an experiment report module.
The functions of the engineering brief introduction module comprise an engineering brief introduction mode of an experimental system, the provided knowledge range comprises ecological water conservancy, engineering examples, fish brief introduction and experimental processes, and a user can learn the related knowledge of the river basin one-gate three-way fishway engineering planning, hydrogeological data and the ecological water conservancy in the engineering brief introduction module.
The experimental pre-learning module can provide an experimental pre-learning mode for viewing an experimental operation process for a user, wherein the experimental operation process comprises the following steps of fish type selection, river flow setting, basic parameter setting, fishway type selection, fishway parameter setting, fish facility induction and fishway observation room setting, three-dimensional fish and fishway display, flow velocity measurement, fish passing amount recording, result analysis and experimental report forming in sequence;
when the experimental operation flow is checked, an operator can check specific information of the experimental operation flow after selecting the experimental operation flow, the specific information of the experimental operation flow comprises various hydraulics related knowledge and experimental parameters which can be related to the examination mode, and further comprises operation instructions required by corresponding experimental steps, corresponding examination key points and required formula specifications.
The assessment mode module runs by means of plug-ins provided by a preset website, can provide assessment modes of an experimental system for users, and comprises the following steps of fish type selection, basic parameter setting, river flow setting, fishway type selection, fishway parameter setting, fish luring facility and fishway observation room arrangement, fish and fishway display, flow velocity measurement, three-dimensional animation observation, fish number recording, experiment comparison and result analysis.
The specific operation comprises the following steps:
step A1, selecting fish types, and selecting and inputting corresponding fish migration time periods, fish body lengths during migration, fish limit flow rates, induced flow rates and activity positions during migration, wherein the migration time periods are divided into scales by seasons;
step A2, setting river channel flow, determining river channel flow Q through the migration period of the selected fishes and the monthly multi-year average flow achievement table, calculating and inputting a weir water head H corresponding to the selected river channel flow Q, and clicking to start a pump;
step A3, setting basic parameters, calculating the average bottom slope i of the fishway according to the height of the entrance and the exit of the fishway, determining and inputting the gate number and the opening of the gate of the river barrier according to the flow of the selected river channel, calculating and inputting the discharge Q of the gate dam according to the water level before the gate and the water level under the gated；
Step A4, selecting fishway types, clicking a fishway type selection button on an interface to select one of the fishway type selection buttons, and selecting a smooth fishway by default for the first time;
step A5, setting fishway parameters, and setting corresponding parameters of fishway width B, design water depth h, partition board spacing L and partition board offset a according to the selected fishway type;
step A6, arranging fish luring facilities and a fishway observation room, selecting fish inducing facilities and the observation room added with a built-in lighting device and a sound device, and clicking the position for placing the fish inducing facilities in a pivot arrangement diagram;
step A7, displaying fish and fishway, clicking animation, displaying the selected fish and fishway structure type, observing the structure and recording;
step A8, flow velocity measurement is carried out, the position of a flow velocity measuring point is arranged in a pivot arrangement diagram in a clicking mode, and the flow velocity of the measuring point is measured and recorded by using a propeller current meter;
a9, observing the three-dimensional animation and recording the number of fish;
step A10, returning to fishway type selection, selecting fishways of types other than smooth type, repeating the steps, and performing comparison experiments, wherein at least two comparison experiments are required;
step A11, carrying out result analysis, and carrying out comparative analysis on previously set related parameters and results according to recorded experimental data; judging whether the set fishway relevant parameters are reasonable or not according to the analysis result, and judging whether further parameter optimization and setting are needed or not; if further parameter optimization is needed, returning to the basic parameter setting, repeating the steps, and optimizing the related parameters again; recording related data and analyzing; if the analysis yields a reasonable result, the parameter optimization is stopped.
After a user finishes the steps of observing the three-dimensional animation and recording the number of fishes in the assessment mode module, if the user finishes the model selection of N fishways in the previous fishway model selection step, the experimental system judges the flow rate of the fishway, if the judgment result is that the flow rate of the fishway is unreasonable, the experimental system returns to the basic parameter setting step, and if the judgment result is that the flow rate of the fishway is reasonable, the experimental system enters the subsequent step;
after the user finishes the steps of observing the three-dimensional animation and recording the number of the fishes in the assessment mode module, if the user does not finish the model selection of the N fishways in the previous fishway model selection step, the experimental system returns to the fishway model selection step;
and N is an integer not less than three.
The examination mode module can provide an experiment mode of a first person visual angle for a user, and the user can check the main structure of the fishway in a short distance by adjusting the visual angle;
when the user uses the examination mode module, the examination mode module displays the fishway three-dimensional model or the three-dimensional animation corresponding to the step where the user is located in real time, the user can check each structure of the fishway through a mouse and a keyboard, and according to the specific flow of the experiment preview mode, the user selects migratory fishes, sets river channel flow, sets basic parameters, selects a fishway type, sets fishway parameters, places fish luring facilities and an observation room, measures flow, records fish passing amount and performs achievement analysis.
If the user finishes the model selection of three fishways in the step of the model selection of the fishway, the experimental data which can be obtained by the assessment mode of the system comprises smooth fishway data and two groups of fishway data which are used as a control group, the experimental data comprise fish types, fish migration time periods, fish body lengths during migration, fish limit flow velocities, induction flow velocities, activity positions during migration, river channel flow Q, fishway inlet and outlet elevations, fishway average bottom slopes i, gate numbers and opening degrees of open river blocking gates, water levels before gates and below gates, gate dam let-off flow Qd, fishway structural patterns, fishway widths B, designed water depths h, partition plate intervals L, bilateral fishway partition plate offsets a, induced fish facility types, induced fish facility positions, fishway flow velocity coefficients, fishway design flow Qf, ecological water-off flow Qe, flow velocity measuring point positions, measuring point flow velocities and recorded fish passing number;
the induced fish facility types comprise light and sound classification.
The experiment report module can provide an experiment report mode of the experiment system for a user, and is used for filling in the experiment data obtained in the examination mode and submitting the experiment data to be corrected by a teacher;
the experimental report mode comprises an engineering general view, selected fish characteristics, selected fishway type description, experimental data summarization and comparative analysis, a comparative chart, experimental summarization and discussion, and is used for filling and submitting an experimental report for a user according to data and data provided by the engineering general view mode, the experimental preview mode and the assessment mode.
The simulation data of the virtual simulation platform is collected and established by relying on the actual data and the numerical simulation data of the bionic fishway project; the flow water level relation, the flow velocity and flow state characteristics, the fishway structure form and structure parameters, the test equipment, the installation and the matching in the virtual simulation platform are all consistent with the real engineering samples of the bionic fishway engineering;
the bionic fishway engineering is a bionic fishway engineering of a river basin of Minjiang, a scheme of a natural-like channel is adopted, wherein the natural-like channel in the scheme comprises a high inlet, a low inlet, a fish passing channel, a converging pool, a flood gate, a fishway outlet, an observation pool, a sampling pool and the like, and further comprises a water supplementing facility and an inlet bottom connecting facility; the structure form of the nature-imitated channel of the ecological-imitated fishway engineering adopts staggered stone blocks, barriers are formed among channels by using stones to dissipate energy and slow down the flow speed, the water passing section is rectangular, the bottom width is about 2.0m, the range of the water depth variation is 1.0-3.0m, the average water depth is about 2.0m, the water surface width is 8.0m when the water is in normal operation water depth, and the average bottom slope is about 0.8%.
The virtual simulation experiment data obtained in the assessment mode can be used for building a physical model to verify data;
the physical model is a detachable replaceable bionic fishway entity model, a water self-circulation data monitoring system is adopted, the physical model comprises a flange ultrasonic flowmeter, a miniature water pumping circulation filter pump, a water inlet pipe and a water outlet pipe, and fishway water flow is simulated through flowing water;
the main body of the detachable replaceable bionic fishway solid model is of an upper-lower structure, a water storage tank is arranged at the lower layer of the main body, and a fishway model and an upper-layer water tank are arranged at the upper layer of the main body;
when the detachable replaceable bionic fishway solid model runs, water in the lower-layer water tank is pumped out through the miniature water pumping circulating filter pump, reaches a stable flow through the water stabilizing grid and then enters the river channel structure in the upper-layer water tank, the river channel structure comprises a river diversion structure comprising a main channel, one part of water entering the river channel structure passes through the river blocking gate and the ecological water drainage holes along the main channel, and the other part of water passes through the fishway model;
the flow velocity of water in the fishway model is regulated and controlled by changing the partition plates in different forms, the water flows out from the fishway outlet and is converged into the main channel of the river channel, and the water flows back to the water storage tank through the water outlet to form self-circulation of water.
The invention has the beneficial effects that:
1. by using a method of combining virtuality and reality, a virtual simulation teaching system is established by relying on existing Minjiang river basin ecological fishway test data and using building model construction software and hydrodynamics numerical simulation software, so that the learning effect of students on the basic theory of hydrodynamics, hydraulic engineering pivot arrangement and ecological water conservancy construction is improved.
2. The contrast experiment that the fishway experiment adopted multiple form expandes, lets the student can politically contrast the result of use of different types fishway.
3. The fishway experiment relates to the design of a simulated ecological fishway, and the sustainable development spirit of harmony of people and nature is promoted.
4. By constructing a model, simulating and reproducing a fishway test, providing real data, completing the test by combining the numerical simulation training of students, and improving the continuity and integrity of the training content of the test.
5. The teaching platform is unified, and teachers can solve the progress of the virtual simulation experiment of students on the background on line and correct the experiment report.
6. The fishway experiment system is based on the virtual simulation platform, can repeatedly develop fishway design, overcomes the problems that the fishway model scale relation causes the monomer experiment scale to be overlarge, the cost is high, the experiment hardware dependency is strong and the form is simplified, solves the waste of fund and time, and has easily adjusted parameters and higher efficiency.
7. The fishway numerical simulation experiment and the physical model experiment result are compared, and after the most suitable fishway form is obtained, the fishway numerical simulation experiment and the physical model experiment result can be put into practical engineering for use, the model manufacturing cost is greatly reduced in the process, and the result is reliable.
Drawings
The invention is described in further detail below with reference to the following figures and detailed description:
FIG. 1 is a schematic flow diagram of the present invention;
FIG. 2 is a schematic diagram of the principles of the present invention;
FIG. 3 is a schematic diagram of the detachable replaceable bionic fishway solid model;
in the figure: 1-fishway exit; 2-passing through a fish channel; 3-a confluence tank; 4-fishway entrance; 5-fishway observation room.
Detailed Description
As shown in the figure, the fishway experiment system based on the virtual simulation platform comprises an engineering brief introduction module, an experiment preview module, an examination mode module and an experiment report module; the using method comprises the following steps:
step one, applying for a virtual account number from a preset website by a mailbox and then logging in a virtual simulation platform;
step two, learning knowledge required by the experiment is carried out through an engineering brief introduction module;
thirdly, the experiment operation steps are previewed through an experiment previewing module;
step four, carrying out a virtual simulation fishway experiment through an examination mode module;
and fifthly, filling and submitting the experiment report through an experiment report module.
The functions of the engineering brief introduction module comprise an engineering brief introduction mode of an experimental system, the provided knowledge range comprises ecological water conservancy, engineering examples, fish brief introduction and experimental processes, and a user can learn the related knowledge of the river basin one-gate three-way fishway engineering planning, hydrogeological data and the ecological water conservancy in the engineering brief introduction module.
The experimental pre-learning module can provide an experimental pre-learning mode for viewing an experimental operation process for a user, wherein the experimental operation process comprises the following steps of fish type selection, river flow setting, basic parameter setting, fishway type selection, fishway parameter setting, fish facility induction and fishway observation room setting, three-dimensional fish and fishway display, flow velocity measurement, fish passing amount recording, result analysis and experimental report forming in sequence;
when the experimental operation flow is checked, an operator can check specific information of the experimental operation flow after selecting the experimental operation flow, the specific information of the experimental operation flow comprises various hydraulics related knowledge and experimental parameters which can be related to the examination mode, and further comprises operation instructions required by corresponding experimental steps, corresponding examination key points and required formula specifications.
The assessment mode module operates by means of plug-ins provided by a preset website, can provide assessment modes of an experimental system for users, and comprises the following steps of fish type selection, basic parameter setting, river flow setting, fishway type selection, fishway parameter setting, fish luring facility and fishway observation room 5 arrangement, fish and fishway display, flow velocity measurement, three-dimensional animation observation, recording of fish quantity, comparison experiment and result analysis.
The specific operation comprises the following steps:
step A1, selecting fish types, and selecting and inputting corresponding fish migration time periods, fish body lengths during migration, fish limit flow rates, induced flow rates and activity positions during migration, wherein the migration time periods are divided into scales by seasons;
step A2, setting river channel flow, determining river channel flow Q through the migration period of the selected fishes and the monthly multi-year average flow achievement table, calculating and inputting a weir water head H corresponding to the selected river channel flow Q, and clicking to start a pump;
step A3, setting basic parameters, calculating the average bottom slope i of the fishway according to the height of the entrance and the exit of the fishway, determining and inputting the gate number and the opening of the gate of the river barrier according to the flow of the selected river channel, calculating and inputting the discharge Q of the gate dam according to the water level before the gate and the water level under the gated；
Step A4, selecting fishway types, clicking a fishway type selection button on an interface to select one of the fishway type selection buttons, and selecting a smooth fishway by default for the first time;
step A5, setting fishway parameters, and setting corresponding parameters of fishway width B, design water depth h, partition board spacing L and partition board offset a according to the selected fishway type;
step A6, arranging fish luring facilities and a fishway observation room, selecting fish inducing facilities and the observation room added with a built-in lighting device and a sound device, and clicking the position for placing the fish inducing facilities in a pivot arrangement diagram;
step A7, displaying fish and fishway, clicking animation, displaying the selected fish and fishway structure type, observing the structure and recording;
step A8, flow velocity measurement is carried out, the position of a flow velocity measuring point is arranged in a pivot arrangement diagram in a clicking mode, and the flow velocity of the measuring point is measured and recorded by using a propeller current meter;
a9, observing the three-dimensional animation and recording the number of fish;
step A10, returning to fishway type selection, selecting fishways of types other than smooth type, repeating the steps, and performing comparison experiments, wherein at least two comparison experiments are required;
step A11, carrying out result analysis, and carrying out comparative analysis on previously set related parameters and results according to recorded experimental data; judging whether the set fishway relevant parameters are reasonable or not according to the analysis result, and judging whether further parameter optimization and setting are needed or not; if further parameter optimization is needed, returning to the basic parameter setting, repeating the steps, and optimizing the related parameters again; recording related data and analyzing; if the analysis yields a reasonable result, the parameter optimization is stopped.
After a user finishes the steps of observing the three-dimensional animation and recording the number of fishes in the assessment mode module, if the user finishes the model selection of N fishways in the previous fishway model selection step, the experimental system judges the flow rate of the fishway, if the judgment result is that the flow rate of the fishway is unreasonable, the experimental system returns to the basic parameter setting step, and if the judgment result is that the flow rate of the fishway is reasonable, the experimental system enters the subsequent step;
after the user finishes the steps of observing the three-dimensional animation and recording the number of the fishes in the assessment mode module, if the user does not finish the model selection of the N fishways in the previous fishway model selection step, the experimental system returns to the fishway model selection step;
and N is an integer not less than three.
The examination mode module can provide an experiment mode of a first person visual angle for a user, and the user can check the main structure of the fishway in a short distance by adjusting the visual angle;
when the user uses the examination mode module, the examination mode module displays the fishway three-dimensional model or the three-dimensional animation corresponding to the step where the user is located in real time, the user can check each structure of the fishway through a mouse and a keyboard, and according to the specific flow of the experiment preview mode, the user selects migratory fishes, sets river channel flow, sets basic parameters, selects a fishway type, sets fishway parameters, places fish luring facilities and an observation room, measures flow, records fish passing amount and performs achievement analysis.
If the user finishes the model selection of three fishways in the step of the model selection of the fishway, the experimental data which can be obtained by the assessment mode of the system comprises smooth fishway data and two groups of fishway data which are used as a control group, the experimental data comprise fish types, fish migration time periods, fish body lengths during migration, fish limit flow velocities, induction flow velocities, activity positions during migration, river channel flow Q, fishway inlet and outlet elevations, fishway average bottom slopes i, gate numbers and opening degrees of open river blocking gates, water levels before gates and below gates, gate dam let-off flow Qd, fishway structural patterns, fishway widths B, designed water depths h, partition plate intervals L, bilateral fishway partition plate offsets a, induced fish facility types, induced fish facility positions, fishway flow velocity coefficients, fishway design flow Qf, ecological water-off flow Qe, flow velocity measuring point positions, measuring point flow velocities and recorded fish passing number;
the induced fish facility types comprise light and sound classification.
The experiment report module can provide an experiment report mode of the experiment system for a user, and is used for filling in the experiment data obtained in the examination mode and submitting the experiment data to be corrected by a teacher;
the experimental report mode comprises an engineering general view, selected fish characteristics, selected fishway type description, experimental data summarization and comparative analysis, a comparative chart, experimental summarization and discussion, and is used for filling and submitting an experimental report for a user according to data and data provided by the engineering general view mode, the experimental preview mode and the assessment mode.
The simulation data of the virtual simulation platform is collected and established by relying on the actual data and the numerical simulation data of the bionic fishway project; the flow water level relation, the flow velocity and flow state characteristics, the fishway structure form and structure parameters, the test equipment, the installation and the matching in the virtual simulation platform are all consistent with the real engineering samples of the bionic fishway engineering;
the bionic fishway engineering is a bionic fishway engineering of a river basin of Minjiang, a natural channel imitation scheme is adopted, and the natural channel imitation scheme comprises a high inlet, a low inlet, a fish passing channel, a converging pool, a flood gate, a fishway outlet 1, an observation pool, a sampling pool and the like, and further comprises a water supplementing facility and an inlet bottom connecting facility; the structure form of the nature-imitated channel of the ecological-imitated fishway engineering adopts staggered stone blocks, barriers are formed among channels by using stones to dissipate energy and slow down the flow speed, the water passing section is rectangular, the bottom width is about 2.0m, the range of the water depth variation is 1.0-3.0m, the average water depth is about 2.0m, the water surface width is 8.0m when the water is in normal operation water depth, and the average bottom slope is about 0.8%.
The virtual simulation experiment data obtained in the assessment mode can be used for building a physical model to verify data;
the physical model is a detachable replaceable bionic fishway entity model, a water self-circulation data monitoring system is adopted, the physical model comprises a flange ultrasonic flowmeter, a miniature water pumping circulation filter pump, a water inlet pipe and a water outlet pipe, and fishway water flow is simulated through flowing water;
the main body of the detachable replaceable bionic fishway solid model is of an upper-lower structure, a water storage tank is arranged at the lower layer of the main body, and a fishway model and an upper-layer water tank are arranged at the upper layer of the main body;
when the detachable replaceable bionic fishway solid model runs, water in the lower-layer water tank is pumped out through the miniature water pumping circulating filter pump, reaches a stable flow through the water stabilizing grid and then enters the river channel structure in the upper-layer water tank, the river channel structure comprises a river diversion structure comprising a main channel, one part of water entering the river channel structure passes through the river blocking gate and the ecological water drainage holes along the main channel, and the other part of water passes through the fishway model;
the flow velocity of water in the fishway model is regulated and controlled by changing the partition plates in different forms, the water flows out from the fishway outlet and is converged into the main channel of the river channel, and the water flows back to the water storage tank through the water outlet to form self-circulation of water.
Example (b):
when a fishway experiment teaching experiment needs to be carried out, firstly, in an experiment pre-learning stage, experimenters log in an experiment pre-learning module to carry out self-learning after registering virtual account numbers, and the type and the characteristic of migration fishes in Minjiang river, the hydraulic condition index of fishway design, the hydraulic characteristic measuring method of key positions of the fishway and the like are displayed through the established realistic BIM + GIS model 3D, and the arrangement and the structure composition of the ecological fishway pivot are solved. Further, the experiment pre-learning module is used for viewing the specific flow operation of the experiment, and is divided into thirteen steps in total. The click-through corresponding experiment process button can enter to view specific data, and the content comprises various hydraulics related knowledge and experiment parameters possibly related to the assessment mode.
The experimental system mainly comprises two parts:
the data model part and a BIM + practice platform of the bionic fishway virtual simulation technology are also core main parts of the invention. Based on actual measured data of a first bionic fishway in a basin of Minjiang river, and combined with BIM technology and hydromechanics numerical simulation, the test process and results of each key structure and parameter type selection are reproduced, and specific preset parameters can be divided into a water flow characteristic parameter module and a fishway structure parameter module.
The design idea is as follows:
aiming at the defects of the traditional fishway model experiment, the content of 'fishway design guide rule for hydraulic and hydroelectric engineering' is combined, the upstream tracing habits of different fishes are considered by the design scheme, the upstream tracing habits comprise that the fishes are attracted into the fishway by utilizing the water flow condition, the condition that the fishes depend on self force to overcome the upstream tracing of the flow velocity and the like, and upstream and downstream water level combinations caused by different operation modes of the gate dam, 3D display of an engineering structure is performed through an established live-action BIM + GIS model, and the determination problems of the water conditions such as the water depth, the flow velocity, the flow state and the like of the fishway inlet and the inner part are solved by using hydrodynamics numerical simulation software. The first part, the information base part. The module part is formed by collecting and sorting a large amount of related data of the bionic fishway in the early stage. The basic principle related to the bionic fishway test and the real data parameters of the one-gate three-wire project are integrated, so that the block-by-block search is facilitated. The second part, the internet platform part. The method is based on the actual project of the first bionic fishway in the river basin of Minjiang and based on the virtual simulation technology, the construction of an internet + information technology practice platform is carried out, and the third part is a BIM + GIS model part. Engineering modeling is carried out through building model construction software, and immersive experience when a user uses is achieved by combining a VR technology. Through simple operation, the engineering model can be watched in a 360-degree panoramic mode. And adjusting fishway parameters, changing the form of fishway partition plates and seeing the change in the virtual simulation fishway model. And the fourth part is a numerical simulation part. After the engineering model stl file is imported through fluid mechanics simulation software, numerical simulation can be carried out, and hydraulic condition data of key positions can be obtained. Multiple groups of data are obtained by changing experimental conditions, a database is formed and then is imported into a virtual simulation platform, and changes are reflected on a BIM (building information modeling) model, so that the optimal fishway form is determined more intuitively.
The specific contents of each module are as follows:
the engineering brief introduction mode depends on the first bionic fishway actual engineering in the Fujian river basin, and introduces the detailed engineering data including engineering planning, concrete parameters of fishway structure, hydrogeological data, Fujian river migratory fish characteristics, model use flow brief introduction and the necessity of ecological water conservancy.
The experimental pre-learning mode provides a concrete experimental flow chart which respectively comprises fish type selection, river flow determination and setting, basic parameter setting, fishway type selection, fishway parameter setting, fish inducing facility and fishway observation room setting, three-dimensional fish and fishway display, flow velocity measurement, fish amount recording, result analysis and experimental report forming. And clicking the corresponding experiment step, and checking the operation explanation, the corresponding assessment key point and the necessary formula specification required by the step.
And the assessment mode is used for displaying the three-dimensional model of the fishway in real time, checking each structure of the fishway through a mouse and a keyboard, sequentially selecting migratory fishes, setting river flow, setting basic parameters, selecting fishway types, setting fishway parameters, placing fish luring facilities and observation rooms, measuring flow, recording fish passing amount and carrying out result analysis according to the specific flow of the experimental pre-study mode. And presenting the corresponding three-dimensional animation on the page according to the steps.
The experimental report mode comprises an engineering overview, selected fish characteristics, selected fishway type description, experimental data summarization and comparative analysis, a comparative chart, and experimental summarization and discussion, and is used for filling and submitting an experimental report for a user according to data and data provided by the three modes.
The structure design is as follows:
the system depends on the fishway structure design of one-gate three-wire engineering in the basin of Minjiang river: the fish passing facility adopts a natural channel imitating scheme and is arranged on the right bank. The imitated natural channel comprises a high inlet, a low inlet, a fish passing channel, a converging pool, a flood gate, a fishway outlet, an observation pool, a sampling pool and the like, and necessary water supplementing facilities and inlet bottom connecting facilities. The engineering characteristics and the ecological habits of fishes are comprehensively considered, the structural form adopts staggered stone blocks, the stone blocks are used for forming barriers among the channels to dissipate energy and slow down the flow speed, the water passing section is rectangular, the bottom width is about 2.0m, the water depth variation range is 1.0-3.0m, the average water depth is about 2.0m, the water surface width is 8.0m when the water is in normal operation water depth, and the average bottom slope is about 0.8%.
The details are as follows
The design comprises the following steps;
collecting basic information of fishway design
The method mainly comprises the steps of river reach shape, hydrology, geology, engineering arrangement, engineering characteristic water level, scheduling operation mode, main fish passing objects, main fish passing seasons and the like.
In the structural design process of the system, the main fish passing objects select rare, special and other migratory and semi-migratory fishes with higher economic value in river reach, and collect the data of the species, habits, quantity, body length, swimming capacity and the like. The main fish passing season is determined according to the time period when the main fish passing object needs to go to the river.
The designed flow rate of the fishway is not more than the limit flow rate of the main fish passing objects; the flow velocity of the fish passing through the fish holes and the fish inlet of the fishway is not less than the induction flow velocity of the fishes.
② fishway structure design
The selected structural forms of the fishway are smooth, vertical seam and bionic. The vertical seam type is divided into a double-side vertical seam type, a same-side vertical seam type and a different-side vertical seam type; the bionic type is divided into a bilateral brute force type, an ipsilateral brute force type and an allopatric brute force type.
③ selecting fish passing facilities
The fish passing facilities have various forms, and the forms are designed for different projects and different fish passing types and have different characteristics. Because the fish elevator, the fish collecting and transporting facility and the fish gate are generally suitable for medium and high water head dams, the project hub belongs to a low water head sluice project, the maximum water head is less than about 10m, and the 3 schemes are not suitable for the project due to the reasons of discontinuous fish passing, unstable fish passing effect, complex operation, high operation cost and the like.
The fishway and the nature-imitated channel are widely applied to low-water-head water conservancy and hydropower engineering, can achieve stable flow velocity and flow state meeting the requirements of fishes in a short distance, and have feasibility.
And the physical model part is a detachable replaceable bionic fishway entity model. Based on the virtual simulation data, a series of design problems of the shape of the fishway, the design of an inlet and an outlet, the design of a tank body and the like are solved, and the overall shape and size of the model are finally determined. This model uses water from cycle data monitoring system, including flange ultrasonic flowmeter, miniature circulation filtration pump that draws water, inlet tube, outlet pipe etc. to the actual conditions in the fishway is simulated better to the water that flows messenger model.
In order to ensure the reliability of the result, a physical entity model is established on the basis of the data model. Because the size is limited, the entity model is greatly reformed on the basis of the actual bionic fishway engineering, partial channel characteristics are reserved, the detachable replaceable partition plate is adopted to simulate the effect of fishways in different forms, and a self-circulating water system is adopted to ensure that water in the fishway is in a flowing state. The design principle follows the guide rule of fishway design of water conservancy and hydropower engineering.
The structure design is as follows:
the solid model main body is of an upper and lower structure. The lower layer is a water storage tank, and the upper layer is a fishway model. Water in the lower-layer water tank is pumped out by a water pump, enters the river channel structure in the upper-layer water tank after reaching stable flow by the water stabilizing grid, then is divided into partial rivers, one part of the partial rivers pass through the river sluice and the ecological water drainage holes along the main channel of the river channel, and the other part of the partial rivers pass through the fishway. The flow velocity of water flow in the fishway is regulated and controlled by changing the partition plates in different forms, and the water flow finally flows out from the fishway outlet, converges into the main channel of the river channel and flows back to the water storage tank through the water outlet to form self-circulation of water. And changing the fishway type by replacing the partition plates in the fishway, and carrying out a plurality of groups of fishway experiments.
The experiment depends on actual engineering data and numerical simulation data of the first bionic fishway in the basin of Fujian river, and a simulation experiment depends on a public website of a national experiment teaching center entity of the civil engineering of the institute of civil engineering of Fuzhou university, and all the flow water level relation, the flow velocity and flow state characteristics, the fishway structure form and structure parameters, the test equipment, the installation and the matching are consistent with the real engineering.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a fishway experimental system based on virtual simulation platform which characterized in that: the experimental system comprises an engineering brief introduction module, an experimental preview module, an examination mode module and an experimental report module; the using method comprises the following steps:
step one, applying for a virtual account number from a preset website by a mailbox and then logging in a virtual simulation platform;
step two, learning knowledge required by the experiment is carried out through an engineering brief introduction module;
thirdly, the experiment operation steps are previewed through an experiment previewing module;
step four, carrying out a virtual simulation fishway experiment through an examination mode module;
and fifthly, filling and submitting the experiment report through an experiment report module.
2. The fishway experimental system based on the virtual simulation platform as claimed in claim 1, wherein: the functions of the engineering brief introduction module comprise an engineering brief introduction mode of an experimental system, the provided knowledge range comprises ecological water conservancy, engineering examples, fish brief introduction and experimental processes, and a user can learn the related knowledge of the river basin one-gate three-way fishway engineering planning, hydrogeological data and the ecological water conservancy in the engineering brief introduction module.
3. The fishway experimental system based on the virtual simulation platform as claimed in claim 2, wherein: the experimental pre-learning module can provide an experimental pre-learning mode for viewing an experimental operation process for a user, wherein the experimental operation process comprises the following steps of fish type selection, river flow setting, basic parameter setting, fishway type selection, fishway parameter setting, fish facility induction and fishway observation room setting, three-dimensional fish and fishway display, flow velocity measurement, fish passing amount recording, result analysis and experimental report forming in sequence;
when the experimental operation flow is checked, an operator can check specific information of the experimental operation flow after selecting the experimental operation flow, the specific information of the experimental operation flow comprises various hydraulics related knowledge and experimental parameters which can be related to the examination mode, and further comprises operation instructions required by corresponding experimental steps, corresponding examination key points and required formula specifications.
4. The fishway experimental system based on the virtual simulation platform as claimed in claim 3, wherein: the assessment mode module runs by depending on a plug-in provided by a preset website, can provide assessment modes of an experimental system for a user, and comprises the following steps of fish type selection, basic parameter setting, river flow setting, fishway type selection, fishway parameter setting, fish luring facility and fishway observation room arrangement, fish and fishway display, flow velocity measurement, three-dimensional animation observation, fish number recording, experiment comparison and result analysis;
the specific operation comprises the following steps:
step A1, selecting fish types, and selecting and inputting corresponding fish migration time periods, fish body lengths during migration, fish limit flow rates, induced flow rates and activity positions during migration, wherein the migration time periods are divided into scales by seasons;
step A2, setting river channel flow, determining river channel flow Q through the migration period of the selected fishes and the monthly multi-year average flow achievement table, calculating and inputting a weir water head H corresponding to the selected river channel flow Q, and clicking to start a pump;
step A3, setting basic parameters, calculating the average bottom slope i of the fishway according to the height of the entrance and the exit of the fishway, determining and inputting the gate number and the opening of the gate of the river barrier according to the flow of the selected river channel, calculating and inputting the discharge Q of the gate dam according to the water level before the gate and the water level under the gated；
Step A4, selecting fishway types, clicking a fishway type selection button on an interface to select one of the fishway type selection buttons, and selecting a smooth fishway by default for the first time;
step A5, setting fishway parameters, and setting corresponding parameters of fishway width B, design water depth h, partition board spacing L and partition board offset a according to the selected fishway type;
step A6, arranging fish luring facilities and a fishway observation room, selecting fish inducing facilities and the observation room added with a built-in lighting device and a sound device, and clicking the position for placing the fish inducing facilities in a pivot arrangement diagram;
step A7, displaying fish and fishway, clicking animation, displaying the selected fish and fishway structure type, observing the structure and recording;
step A8, flow velocity measurement is carried out, the position of a flow velocity measuring point is arranged in a pivot arrangement diagram in a clicking mode, and the flow velocity of the measuring point is measured and recorded by using a propeller current meter;
a9, observing the three-dimensional animation and recording the number of fish;
step A10, returning to fishway type selection, selecting fishways of types other than smooth type, repeating the steps, and performing comparison experiments, wherein at least two comparison experiments are required;
step A11, carrying out result analysis, and carrying out comparative analysis on previously set related parameters and results according to recorded experimental data; judging whether the set fishway relevant parameters are reasonable or not according to the analysis result, and judging whether further parameter optimization and setting are needed or not; if further parameter optimization is needed, returning to the basic parameter setting, repeating the steps, and optimizing the related parameters again; recording related data and analyzing; if the analysis yields a reasonable result, the parameter optimization is stopped.
5. The fishway experimental system based on the virtual simulation platform as claimed in claim 4, wherein: after a user finishes the steps of observing the three-dimensional animation and recording the number of fishes in the assessment mode module, if the user finishes the model selection of N fishways in the previous fishway model selection step, the experimental system judges the flow rate of the fishway, if the judgment result is that the flow rate of the fishway is unreasonable, the experimental system returns to the basic parameter setting step, and if the judgment result is that the flow rate of the fishway is reasonable, the experimental system enters the subsequent step;
after the user finishes the steps of observing the three-dimensional animation and recording the number of the fishes in the assessment mode module, if the user does not finish the model selection of the N fishways in the previous fishway model selection step, the experimental system returns to the fishway model selection step;
and N is an integer not less than three.
6. The fishway experimental system based on the virtual simulation platform as claimed in claim 4, wherein: the examination mode module can provide an experiment mode of a first person visual angle for a user, and the user can check the main structure of the fishway in a short distance by adjusting the visual angle;
when the user uses the examination mode module, the examination mode module displays the fishway three-dimensional model or the three-dimensional animation corresponding to the step where the user is located in real time, the user can check each structure of the fishway through a mouse and a keyboard, and according to the specific flow of the experiment preview mode, the user selects migratory fishes, sets river channel flow, sets basic parameters, selects a fishway type, sets fishway parameters, places fish luring facilities and an observation room, measures flow, records fish passing amount and performs achievement analysis.
7. The fishway experimental system based on the virtual simulation platform as claimed in claim 4, wherein: if the user finishes the model selection of three fishways in the step of the model selection of the fishway, the experimental data which can be obtained by the assessment mode of the system comprises smooth fishway data and two groups of fishway data which are used as a control group, the experimental data comprise fish types, fish migration time periods, fish body lengths during migration, fish limit flow velocities, induction flow velocities, activity positions during migration, river channel flow Q, fishway inlet and outlet elevations, fishway average bottom slopes i, gate numbers and opening degrees of open river blocking gates, water levels before gates and below gates, gate dam let-off flow Qd, fishway structural patterns, fishway widths B, designed water depths h, partition plate intervals L, bilateral fishway partition plate offsets a, induced fish facility types, induced fish facility positions, fishway flow velocity coefficients, fishway design flow Qf, ecological water-off flow Qe, flow velocity measuring point positions, measuring point flow velocities and recorded fish passing number;
the induced fish facility types comprise light and sound classification.
8. The fishway experimental system based on the virtual simulation platform as claimed in claim 4, wherein: the experiment report module can provide an experiment report mode of the experiment system for a user, and is used for filling in the experiment data obtained in the examination mode and submitting the experiment data to be corrected by a teacher;
the experimental report mode comprises an engineering general view, selected fish characteristics, selected fishway type description, experimental data summarization and comparative analysis, a comparative chart, experimental summarization and discussion, and is used for filling and submitting an experimental report for a user according to data and data provided by the engineering general view mode, the experimental preview mode and the assessment mode.
9. The fishway experimental system based on the virtual simulation platform as claimed in claim 4, wherein: the simulation data of the virtual simulation platform is collected and established by relying on the actual data and the numerical simulation data of the bionic fishway project; the flow water level relation, the flow velocity and flow state characteristics, the fishway structure form and structure parameters, the test equipment, the installation and the matching in the virtual simulation platform are all consistent with the real engineering samples of the bionic fishway engineering;
the bionic fishway engineering is a bionic fishway engineering of a river basin of Minjiang, a scheme of a natural-like channel is adopted, wherein the natural-like channel in the scheme comprises a high inlet, a low inlet, a fish passing channel, a converging pool, a flood gate, a fishway outlet, an observation pool, a sampling pool and the like, and further comprises a water supplementing facility and an inlet bottom connecting facility; the structure form of the nature-imitated channel of the ecological-imitated fishway engineering adopts staggered stone blocks, barriers are formed among channels by using stones to dissipate energy and slow down the flow speed, the water passing section is rectangular, the bottom width is about 2.0m, the range of the water depth variation is 1.0-3.0m, the average water depth is about 2.0m, the water surface width is 8.0m when the water is in normal operation water depth, and the average bottom slope is about 0.8%.
10. The fishway experimental system based on the virtual simulation platform as claimed in claim 8, wherein: the virtual simulation experiment data obtained in the assessment mode can be used for building a physical model to verify data;
the physical model is a detachable replaceable bionic fishway entity model, a water self-circulation data monitoring system is adopted, the physical model comprises a flange ultrasonic flowmeter, a miniature water pumping circulation filter pump, a water inlet pipe and a water outlet pipe, and fishway water flow is simulated through flowing water;
the main body of the detachable replaceable bionic fishway solid model is of an upper-lower structure, a water storage tank is arranged at the lower layer of the main body, and a fishway model and an upper-layer water tank are arranged at the upper layer of the main body;
when the detachable replaceable bionic fishway solid model runs, water in the lower-layer water tank is pumped out through the miniature water pumping circulating filter pump, reaches a stable flow through the water stabilizing grid and then enters the river channel structure in the upper-layer water tank, the river channel structure comprises a river diversion structure comprising a main channel, one part of water entering the river channel structure passes through the river blocking gate and the ecological water drainage holes along the main channel, and the other part of water passes through the fishway model;
the flow velocity of water in the fishway model is regulated and controlled by changing the partition plates in different forms, the water flows out from the fishway outlet and is converged into the main channel of the river channel, and the water flows back to the water storage tank through the water outlet to form self-circulation of water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011014060.0A CN112131745B (en) | 2020-09-24 | 2020-09-24 | Fishway experiment system based on virtual simulation platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011014060.0A CN112131745B (en) | 2020-09-24 | 2020-09-24 | Fishway experiment system based on virtual simulation platform |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112131745A true CN112131745A (en) | 2020-12-25 |
| CN112131745B CN112131745B (en) | 2022-10-14 |
Family
ID=73839264
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011014060.0A Active CN112131745B (en) | 2020-09-24 | 2020-09-24 | Fishway experiment system based on virtual simulation platform |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112131745B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114065520A (en) * | 2021-11-17 | 2022-02-18 | 西安理工大学 | Fish migration channel determination method and system |
| CN115440121A (en) * | 2022-10-21 | 2022-12-06 | 天津大学 | Open channel water flow connection virtual simulation experiment platform, method, system and application |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004098705A (en) * | 2002-09-04 | 2004-04-02 | Nissan Motor Co Ltd | Apparatus and method for assisting development of vehicular anti-lock brake system |
| CN106759164A (en) * | 2016-11-23 | 2017-05-31 | 中国水利水电科学研究院 | A kind of tidal reach fish pass inlet design method and fish pass import |
| CN110633530A (en) * | 2019-09-18 | 2019-12-31 | 南通大学 | Fishway design method based on computational fluid dynamics and convolutional neural network |
-
2020
- 2020-09-24 CN CN202011014060.0A patent/CN112131745B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004098705A (en) * | 2002-09-04 | 2004-04-02 | Nissan Motor Co Ltd | Apparatus and method for assisting development of vehicular anti-lock brake system |
| CN106759164A (en) * | 2016-11-23 | 2017-05-31 | 中国水利水电科学研究院 | A kind of tidal reach fish pass inlet design method and fish pass import |
| CN110633530A (en) * | 2019-09-18 | 2019-12-31 | 南通大学 | Fishway design method based on computational fluid dynamics and convolutional neural network |
Non-Patent Citations (3)
| Title |
|---|
| HONGJING CHEN1 等: "A Brief Introduction to the First Natural-Like Fishway Project in Fujian Province, China", 《IOP CONFERENCE SERIES: EARTH AND ENVIRONMENTAL SCIENCE》 * |
| 胡乔一 等: "孔缝组合式仿生态鱼道流动特性数值模拟研究", 《中国农村水利水电》 * |
| 龙渡江: "基于虚拟仿真教学平台的景观设计实验教学的设计与构建", 《现代职业教育》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114065520A (en) * | 2021-11-17 | 2022-02-18 | 西安理工大学 | Fish migration channel determination method and system |
| CN114065520B (en) * | 2021-11-17 | 2022-07-05 | 西安理工大学 | Fish migration channel determination method and system |
| CN115440121A (en) * | 2022-10-21 | 2022-12-06 | 天津大学 | Open channel water flow connection virtual simulation experiment platform, method, system and application |
| CN115440121B (en) * | 2022-10-21 | 2024-03-22 | 天津大学 | Open channel water flow connection virtual simulation experiment platform, method, system and application |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112131745B (en) | 2022-10-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105631168B (en) | A kind of river basin flood evolution visual simulating method of real-time high-efficiency | |
| CN112131745B (en) | Fishway experiment system based on virtual simulation platform | |
| CN104598701B (en) | A kind of river pollution emulation deduction method of three-dimensional scenic segment iteration | |
| CN115408887B (en) | Numerical simulation and evaluation method for water intake entrainment mechanism of offshore power plant | |
| Isaac et al. | Sediment management studies of a run-of-the-river hydroelectric project using numerical and physical model simulations | |
| CN109472109B (en) | A kind of composite river simplified section and calculation method for hydrological distribution model | |
| Khanahmadi et al. | Hydraulic of curved type-B piano key weirs characteristics under free flow conditions | |
| Wei et al. | Multireservoir flood-control optimization with neural-based linear channel level routing under tidal effects | |
| CN113312690B (en) | Estuary leaf vein-like river network tide boundary determination method | |
| Jiang et al. | Variable density bore interaction with block obstacles | |
| Grobman et al. | A multifunctional computational approach to waterfront design | |
| Ramirez et al. | The numerical simulation of the hydrodynamics of Barbamarco Lagoon, Italy | |
| Wang et al. | Modelling the hydraulic characteristics of diaphragm fishways and the effects on fish habitats | |
| CN115440121B (en) | Open channel water flow connection virtual simulation experiment platform, method, system and application | |
| Lhomme et al. | Large-scale urban floods modelling and two-dimensional shallow water models with porosity | |
| CN109506891A (en) | A kind of sink and its test technology process for simulating fresh and salt water mixing | |
| Logan et al. | Mechanics and modeling of flow, sediment transport and morphologic change in riverine lateral separation zones | |
| Qamar et al. | Physical and numerical modelling for settling efficiency of desilting chamber | |
| Caldatto et al. | Characterization of woody material transport on the Madeira River at the Jirau Hydroelectric Power Plant: a study using a three-dimensional particle model | |
| Sonnemans | Testing bifurcation stability for both river and tidal systems in a physical model | |
| Lesser et al. | Three-dimensional morphological modelling in Delft3D-FLOW | |
| Shaoxiong et al. | Numerical simulation on temperature of water released from multi-level intake of reservior | |
| Tillmann | Does Large Wood Make It Through a Montane Reservoir? | |
| King | Modeling of marshes and wetlands | |
| Chang | Dynamics of saltwater intrusion processes in saturated porous media systems |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |