CN103559375B - The numerical simulation of scheduling engineering water correction and visual simulation system - Google Patents
The numerical simulation of scheduling engineering water correction and visual simulation system Download PDFInfo
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Abstract
The invention provides a kind of numerical simulation and the visual simulation system of dispatching engineering water correction, this system adopts service-oriented system and continuous integrating method, integrated lake water quality On-Line Dynamic Monitoring module, lake group's Hydrology loop module, distributed flow field, lake computing module, lake water quality Analysis of water environment module and digital lake Visual Simulation System.The flow field, lake under various complicated landform, complicated weather and Complex Flow Status can be simulated, there is the advantage that numbered analog simulation precision is high.
Description
Technical field
The invention belongs to lake water quality improving environment field, be specifically related to a kind of numerical simulation and the visual simulation system of dispatching engineering water correction.
Background technology
The network of rivers, lake is one of most important freshwater resources of China, plays immeasurable effect to society and expanding economy.But along with the quickening of economic development and urbanization process, industrial waste water and sanitary sewage discharge capacity increase day by day, cause the eutrophication aggravation of the network of rivers, lake, Lakes Dry Up, lake water quality to go from bad to worse.
Namely Lake Water network regulation degree engineering is the engineering administered contaminated lake and manage, and in prior art, adopts Numerical Predicting Method to carry out simulation of water quality emulation to each optional scheduling scheme of Lake Water network regulation degree engineering.In simulation of water quality emulation, usually carry out based on pre-established Hydrodynamic Model.But, tradition is ignored based on the water quality prediction method of Hydrodynamic Model or has generally changed the impact of the factors such as complicated weather, landform, fluidised form, sewage draining exit, accident, too contaminant transportation process simulation under emphasis ecotopia condition, its limited precision that predicts the outcome, accurately cannot describe lake pollution thing Transport and water correction mechanism, be difficult to meet and instruct Lake Water network regulation degree engineering management actual demand.
Summary of the invention
For the defect that prior art exists, the invention provides a kind of numerical simulation and the visual simulation system of dispatching engineering water correction, there is the advantage that numbered analog simulation precision is high.
The technical solution used in the present invention is as follows:
The invention provides a kind of numerical simulation and the visual simulation system of dispatching engineering water correction, this system adopts service-oriented system and continuous integrating method, integrated lake water quality On-Line Dynamic Monitoring module, lake group's Hydrology loop module, distributed flow field, lake computing module, lake water quality Analysis of water environment module and digital lake Visual Simulation System.
Preferably, described lake water quality On-Line Dynamic Monitoring module is used for: with asynchronous servo Web Service form, receive and process each information source issue lake attribute information, and with temporal index form, this lake attribute information is organized, analyze and share; Wherein, described lake attribute information comprises: initial flow-field information and water quality information;
Described lake group's Hydrology loop module comprises: base water rain condition information management unit and distributed product runoff concentration calculation unit; Wherein, described base water rain condition information management unit for storing, the physical geography information of sharing and management lake region and history watermark protocol observation data; Described distributed product runoff concentration calculation unit is used for: adopt the structured grid with local refinement feature, the simulating area of lake region is divided into the element grid that several have horizontal connection and vertical contact; Then, adopt the lake group's water circulation space-time model based on distributed grid Xinanjiang model, the product calculating each element grid respectively confluxes and all kinds of contaminant capacity;
Distributed flow field, described lake computing module is used for: first load and to check in computational fields DEM under water, setting gradually each sluice gate, the water diversion flow of pumping plant and the initial launch water level in each lake; Then choose wind item ambient field in computational fields, with two-dimensional shallow water equation for flow cavitation result equation, integrated and adopt the high precision finite volume model on self-adaptation rectangular node to solve, simulation obtains lake region Flow Field Distribution situation;
Described lake water quality Analysis of water environment module is used for: the spatio-temporal segmentation setting up the change of lake pollution thing, carries out prediction and calculation on the different scheduling scheme of Lake Water network regulation degree engineering to the impact of water quality;
Described digital lake Visual Simulation System is used for: be two by water correction numerical simulation result treatment, three-dimensional scene deduces animation.
Preferably, described lake water quality Analysis of water environment module comprises:
Lake water environment capacity computing unit: for calculating the maximum water environment capacity in each lake of river network of lake region, be specially: according to lake type, adopts uniform mixture model, non-uniform mixing model or eutrophication model to calculate the water environment capacity in lake;
Typical scene analogue unit: for according to observational data, thematic map, monitoring station measured data, use the lake pollution thing migration models based on finite volume method, comprehensive simulation is carried out to the lake water quality under typical context wind field, burst pollution thing or heavy rain sight;
Scheduling scheme analogue unit: lake attribute information, lake group's Hydrology loop module for obtaining based on lake water quality On-Line Dynamic Monitoring module scheduling time of forecasting hydrographic information in interval and the product of each element grid confluxes and all kinds of contaminant capacity, distributed flow field, lake computing module are analyzed scheduling time interval in information of flow, process is improved to the lake water quality between given scheduling scheme implementation period and carries out numerical simulation.
Preferably, described lake water quality Analysis of water environment module is also based on fluid dynamics, establish lake pollution thing water quality migration models based on finite volume method, specifically comprise chemical oxygen demand COD water quality migration models, total phosphorus TP water quality migration models and total nitrogen TN water quality migration models.
Preferably, described digital lake Visual Simulation System comprises: analog result visualization processing unit, two-dimentional display unit and three-dimensional display unit;
Wherein, analog result visualization processing unit is used for: complete the work for the treatment of of analog result to grid information by the GIS service being distributed on server end, specifically comprise the following steps:
S1: format analogue unit, concrete steps are as follows: (1) extracts the geometric center information of each analogue unit; (2) knot vector data set is generated; (3) each internodal processing order index chain of generation is calculated; (4) by Delaunay rule, connect each node successively, make all analogue units all be contained in continuous and nonoverlapping triangular net;
S2: initialization scheduling engineering water correction numerical simulation result, generates ASCII character data stream;
S3: setup times step-length, generates the key frame queue of scheduling engineering water correction process;
S4: the queue sequence generated by S3, batch processing key frame, concrete steps are as follows: the triangular mesh that (1) generates according to S1, and on each summit, place inserts the prediction term analogue value successively; (2) imitative TIN structure, the pseudo-terrain data structure of the generation forecast item analogue value; (3) along " landform " domatic interpolation; (4) output sizing grid is set, the pseudo-terrain data after interpolation is converted to raster data; (4) along analogue unit border and physical constraint border cuts raster data; (5) multiple grade section is set, reclassification raster data; (6) the visualization processing work of all key frames is completed successively;
S5: result is stored into spatial database;
Two dimension display unit is used for: utilize WPF and ArcGIS API for WPF that each module result of calculation is carried out two dimension and dynamically play up and visual presentation;
Three-dimensional display unit is used for: the geographical information visualization inquiry and the three-dimensional rendering function of operating function and OSG that utilize the terrain modeling function of VPB, OSG-GIS, carries out dynamically playing up of Visualization Modeling and analog result to lake region.
Beneficial effect of the present invention is as follows:
The numerical simulation of scheduling engineering water correction provided by the invention and visual simulation system, by integrated lake water quality On-Line Dynamic Monitoring module, Hydrology loop module, lake distributed flow field module and lake water quality Analysis of water environment module, non-unified structured grid is adopted to divide zoning, the flow field, lake under various complicated landform, complicated weather and Complex Flow Status can be simulated, there is the advantage that numbered analog simulation precision is high.
Accompanying drawing explanation
Fig. 1 is the numerical simulation of scheduling engineering water correction provided by the invention and the tree-shaped structural drawing of entirety of visual simulation system;
Fig. 2 is the numerical simulation of scheduling engineering water correction provided by the invention and three layers of software architecture figure of visual simulation system;
Fig. 3 is distributed grid Xinanjiang model calculation flow chart in the group's Hydrology loop module of lake provided by the invention;
Fig. 4 is simulated data visualized data flow path switch figure provided by the invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail:
As shown in Figure 1, the invention provides a kind of numerical simulation and the visual simulation system of dispatching engineering water correction, this system integration lake water quality On-Line Dynamic Monitoring module, lake group's Hydrology loop module, distributed flow field, lake computing module, lake water quality Analysis of water environment module and digital lake Visual Simulation System.Below concrete structure and the corresponding function of these functional modules is introduced respectively:
(1) lake water quality On-Line Dynamic Monitoring module
Lake water quality On-Line Dynamic Monitoring module is used for: with asynchronous servo Web Service form, receive and process each information source issue lake attribute information, such as, the lake attribute information of XML or JSON form issued of the information source such as ZigBee acquisition node, hydrology website, meteorological site; And with temporal index form, this lake attribute information organized, analyze and share; Wherein, lake attribute information comprises: initial flow-field information and water quality information, such as, initial flow-field information is the information such as the depth of water or flow velocity, and water quality information is the parameter value such as pH value, COD concentration, TP concentration, TN concentration, water temperature, dissolved oxygen DO, turbidity, conductivity of Lake Water.
Adopt asynchronous servo Web Service form, lake water quality On-Line Dynamic Monitoring module is as client, after it sends data acquisition request to information source, other operations can be proceeded, and need not outstanding message source return message, thus improve the work efficiency of lake water quality On-Line Dynamic Monitoring module.
(2) lake group Hydrology loop module
Lake group's Hydrology loop module is used for: for water resources in lake distribution and water circulation condition, comprehensive water system land surface condition, evaporation, precipitation, under ooze, the Different factor such as economic society water and natural stream networks water quality exchanges, apply the Lake Water circulation space-time model based on distributed grid Xinanjiang model, realize lake region water system sediments formula and produce runoff concentration calculation and management function.
Specifically comprise: base water rain condition information management unit and distributed product runoff concentration calculation unit.
Wherein, base water rain condition information management unit is used for storing, the physical geography information of sharing and management lake region and history watermark protocol observation data, wherein, the physical geography information of lake region comprises lake region DEM (Digital Elevation Model, digital elevation model), DOM (Document Object Model, document dbject model) etc. basic geodata, history watermark protocol observation data comprises lake region history rainfall, temperature, wind speed, the hydrometeorological observation data such as relative humidity, also there is upper strata, lake, lower floor, the function of statistic analysis of deep layer tension water capacity and free water capacity information,
Distributed product runoff concentration calculation unit is used for: adopt the structured grid with local refinement feature, the simulating area of lake region is divided into the element grid that several have horizontal connection and vertical contact; Then, adopt the lake group's water circulation space-time model based on distributed grid Xinanjiang model (XAJGridModel), the product calculating each element grid respectively confluxes and all kinds of contaminant capacity.
(3) distributed flow field, lake computing module
Distributed flow field, lake computing module is used for: first load and to check in computational fields DEM under water, setting gradually each sluice gate, the water diversion flow of pumping plant and the initial launch water level in each lake; Then choose wind item ambient field in computational fields, with two-dimensional shallow water equation for flow cavitation result equation, integrated and adopt the high precision finite volume model on self-adaptation rectangular node to solve, simulation obtains flow field, lake region.Wherein, the lake Flow Field Calculation result of the lower 3 kinds of diversion programs of finite volume model install beforehand 8 kinds of wind directions.
In addition, this model additionally provides the Flow Field Calculation pattern of self-defined boundary condition; User can rule of thumb or expert decision-making scheme, manually input each lock pump water diversion flow, Background wind wind speed size and wind direction, and provide the supplementary module interface that flow field, lake calculates in real time, finally checks the result of calculation in flow field.
(4) lake water quality Analysis of water environment module
Lake water quality Analysis of water environment module is on the basis of distributed flow field, lake computing module, study the Transport of various water pollutant under Different climate condition and flow field condition, each phase commutativity that the pollution of area source caused according to precipitation in addition brings and space distribution rule thereof, consider each pollutant phase Self-variation rule in the water system water body of lake region, set up the spatio-temporal segmentation of lake pollution thing change, on the impact of water quality, prediction and calculation is carried out to the different scheduling scheme of Lake Water network regulation degree engineering.
Lake water quality Analysis of water environment module comprises following three functional units:
1) lake water environment capacity computing unit: for calculating the maximum water environment capacity in each lake of river network of lake region, concrete, can, according to self-characteristics such as the size in lake, kind, pollutant mixed, the one in uniform mixture model, non-uniform mixing model and eutrophication model be adopted to calculate.
2) typical scene analogue unit: for according to observational data, thematic map, monitoring station measured data, use the lake pollution thing migration models based on finite volume method, comprehensive simulation is carried out to the lake water quality under typical context wind field, burst pollution thing or heavy rain sight;
3) scheduling scheme analogue unit: lake attribute information, lake group's Hydrology loop module for obtaining based on lake water quality On-Line Dynamic Monitoring module scheduling time of forecasting hydrographic information in interval and the product of each element grid confluxes and all kinds of contaminant capacity, distributed flow field, lake computing module are analyzed scheduling time interval in information of flow, process is improved to the lake water quality between given scheduling scheme implementation period and carries out numerical simulation.
Lake water quality Analysis of water environment module, also based on fluid dynamics, establishes lake pollution thing water quality migration models based on finite volume method, specifically can comprise the water quality migration models of chemical oxygen demand COD, total phosphorus TP, these 3 kinds of pollutants of total nitrogen TN.In the Migration Simulation process of pollutant, consider the external factor of pollutant convection current that water diversion flow causes and diffusion, and the internal factor of each pollutant its own shape, such as total phosphorus is divided into the phosphorus of the Phos of solubilised state, the organophosphorus of free state and precipitation state, and total nitrogen is divided into 5 kinds of forms such as organic nitrogen, ammonia nitrogen, cultured water.In addition, pollutant water quality migration models also contemplates water temperature, the absorption of bed mud and the impact of release and point source blowdown.Pollutant water quality migration models by the method parameters concentrating batch to import parameter, thus can carry out simulation of water quality, is observed the change of these three kinds of pollutant loads in each lake in diversion process by the concrete numerical value of pollutant and curve intuitively.
(5) digital lake Visual Simulation System
Digital lake Visual Simulation System is used for: be that two three-dimensional scene deduce animation by water correction numerical simulation result treatment.
Digital lake Visual Simulation System comprises: analog result visualization processing unit, two-dimentional display unit and three-dimensional display unit.Wherein two-dimentional display unit and three-dimensional display unit all possess the mutual function that to link with chart control in the system platform developed based on WPF.
1) analog result visualization processing unit
Analog result visualization processing unit, mainly through being distributed on the GIS service of server end to complete the work for the treatment of of analog result to grid information, as shown in Figure 4, comprises the following steps:
Step1: format analogue unit, concrete steps are as follows: (1) extracts the geometric center information of each analogue unit, (2) knot vector data set is generated, (3) each internodal processing order index chain of generation is calculated, (4) by Delaunay rule, connect each node successively, make all analogue units all be contained in continuous and nonoverlapping triangular net;
Step2: initialization scheduling engineering water correction numerical simulation result, generates ASCII character data stream;
Step3: setup times step-length, generates the key frame queue of scheduling engineering water correction process;
Step4: the queue sequence generated by Step3, batch processing key frame, concrete steps are as follows: the triangular mesh that (1) generates according to Step1, on each summit, place inserts the prediction term analogue value successively, (2) imitative TIN structure, the pseudo-terrain data structure of the generation forecast item analogue value, (3) along " landform " domatic interpolation, (4) output sizing grid is set, pseudo-terrain data after interpolation is converted to raster data, (4) along analogue unit border and physical constraint border cuts raster data, (5) multiple grade section is set, reclassification raster data, (6) the visualization processing work of all key frames is completed successively,
Step5: result is stored into spatial database.
2) two-dimentional display unit
Two dimension display unit utilizes WPF and ArcGIS API for WPF that each module result of calculation is carried out two dimension and dynamically plays up and visual presentation, can develop based on ArcGIS API for WPF.Wherein, WPF (Windows Presentation Foundation) is the user interface frame based on Windows Vista that Microsoft releases, and belongs to a part of NET Framework3.0.It provide unified programming model, language and framework, really accomplish the work of separating interface designer and developer; It provide brand-new multimedia interactive graphical interface of user simultaneously.ArcGIS API is the API based on browser, for developing high-performance, wieldy map application.
Concrete, when traditional ArcGISDynamicMapServiceLayer is used for the analog result of real-time display space database, there is display effect difference, and the deficiency that refresh rate is slow; Reason is: ArcGISTiledMapServiceLayer improves display efficiency by calling buffer memory picture, but does not possess dynamic projection, and cannot control layer visibility separately, does not meet the engineering demand of the meticulous displaying of flow field change of water quality process.
And in the present invention, two-dimentional display unit carries out the displaying of 2 D animation by rewriting TiledMapServiceLayer.First, client inherits TiledMapServiceLayer, obtains section by GetUrl () method, returns the Url of ExportMap splicing in REST SDK, thus achieves the buffer memory layer display mode of dynamic data.
3) three-dimensional display unit
Three-dimensional display unit utilizes the terrain modeling function of VPB (Virtual Planet Builder), the geographical information visualization of OSG-GIS is inquired about and the three-dimensional rendering function of operating function and OSG, dynamically playing up of Visualization Modeling and analog result is carried out to lake region, can develop based on OSG.
Three-dimensional display unit can adopt C++ to develop, analog result with the formal notation of color vector on dimensional topography; Three-dimensional water surface effect is the simulation adopting water level fluctuation method and discrete fourier transform method to realize current, adopts OpenGL to carry out the mapping of texture or particle effect shows in emulation platform, thus display emulated interface true to nature.
As shown in Figure 2, the numerical simulation of scheduling engineering water correction provided by the invention and visual simulation system can adopt service-oriented system and continuous integrating method to build, and comprise basal layer, service layer and execution level three layers of software architecture.
(1) basal layer
Basal layer comprises uniform data supporting platform and user interactions platform two large divisions.
1) uniform data supporting platform:
Uniform data supporting platform carries out data interaction by data management module and service layer, for different development platforms and programming language, data management module provides the normal data specification of consolidation form, when data management module receives the request of data of XML (extend markup language) form, first demand type is identified, and the data in storing process are encoded, become XML data stream to carry out data transmission by communication interface again the data type conversion of correspondence, thus achieve the multi-platform support in uniform data source.In Fig. 2, data management module connects the monitoring interface of thematic data base, GIS database and asynchronous servo.
2) user interactions platform
User interactions platform can be the open dynamic generation interactive system based on WPF exploitation, the interaction platform information of visible customization can be sent to the automatic integrated client of designated module by interface module and issue use, in Fig. 2, the integrated designated module of client is main functional modules.
(2) service layer
Service layer is the core of whole distributed system, be made up of the function services module of primary service module and several asynchronous servos, its core comprises database communication service, GIS service, interface service and algorithm model service etc., various function services is not subject to the restriction of region and platform, only need on primary service module, to complete service registry to provide the message interface of standard, namely the form of Services Composition can be integrated into system;
(3) execution level
Execution level is with the normal operation of Web Service for principal mode supporting layer.Web Services Description Language (WSDL) (WSDL) is used to describe service, universal description discovery and integration protocol agreement (UDDI) is used to carry out service register and discovery, Simple Object Access Protocol (SOAP) is used to carry out message, mapping is completed by a workflow between service layer and execution level, comprise issue, discovery, combination, binding and perform five steps, upgrading with the Asynchronous Incremental formula realizing service layer.
For setting forth scheme provided by the invention in more detail, choosing the large East Lake being positioned at city, China Wuhan City, Hubei Province ecological network of rivers connection engineering is that example is set forth.The object of this project is by reconstruction or newly-built diversion facility, recovers the associate naturally of the Changjiang river and six Main Lakes in region, large East Lake, by " drawing Jiang Jihu ", for good external condition and environment are created in restoration of the ecosystem.Simulated scenario is set to the ecological network of rivers, large East Lake when heavy rain (263mm) is met in 20 years one, lake region and is communicated with engineering and performs scheduling scheme as shown in table 1, and emulation cycle is 3 days.
Table 1 sets large each lake, East Lake discharge conduit flow value under sight
| Port canal title | New irrigation canals and ditches | Port, Shahu Lake | Dongsha Hu Qu | Nine peak canals | Red-Flag Canal | Bei Hu huge port |
| Drain discharge (m 3／s) | 85 | 15 | 0 | 0 | 49 | 100 |
Numerical simulation and the visual simulating process of scheduling engineering water correction are:
(1) by lake water quality On-Line Dynamic Monitoring resume module acquisition node information, with the Web Service form of asynchronous servo, the data message of XML or the JSON form that the information sources such as Treatment Analysis ZigBee acquisition node, hydrology website, meteorological site are issued, and carry out organizing, analyze and sharing with temporal index, obtain each lake region source quality starting condition, as shown in table 2, mainly comprise initial flow-field information (water level, flow velocity) and water quality information (COD concentration, TP concentration, TN concentration, water temperature).
The large each source quality starting condition of East Lake Water, Wuhan network regulation degree of table 2
(2) lake group's Hydrology loop module is used to simulate large East Lake each Lake water quantity of lake group, water level and numerical value change process, as shown in Figure 3.
For distributed grid Xinanjiang model, input parameter is the data such as temperature, precipitation, large basin, East Lake DEM, soil types, Land_use change of Huan Hu weather station, calculates, export each large East Lake Evolution of Regional Hydrologic Cycle information through model;
The calculating of water production rate mainly adopts runoff coefficient method, and computing formula is as follows:
W=1000*α*F*I
In formula: W is water production rate, unit is m
3; α is drainage ratio; F represents water catchment area, and unit is km
2; I represents design storm size, and unit is mm.
(3) distributed flow field, lake computing module is used to calculate flow field, lake.
Setting lake initial launch water level, border diversion program, model cootrol parameter and roughness, utilize finite volume method on quadrilateral mesh, solve two-dimensional shallow water equation, calculates all grids at the not depth of water, flow rate units mean value in the same time.
Concrete, for two-dimensional shallow water equation, input data comprise end elevation file, acceleration of gravity, critical reconstruct flow velocity, lake roughness, CFL number, simulated time, Output rusults time step, choose water diversion flow scheme, wind speed.As calculated, all nodes are exported at the depth of water in multiple moment, flow rate units mean value and renewal period of water body.
Wherein, flow cavitation result equation is two-dimensional shallow water equation, and its conservation form is:
T is the time; X and y is volume coordinate, and U is conserved quantity; E and G is respectively the flux in x and y direction; S is source item.
(4) lake water quality Analysis of water environment module
Lake water quality Analysis of water environment module comprises lake water environment capacity computing unit, typical scene analogue unit and scheduling scheme analogue unit:
1) lake water environment capacity computing unit:
According to scale, the depth of water, the storage capacity in each lake, large East Lake, enter the information such as lake pollutant kind, select uniform mixture model, non-uniform mixing model or eutrophication model, calculate the maximum water environment capacity in each lake, the network of rivers, large East Lake;
Input data comprise: pollutant enter lake speed, the drainage rate of the existing pollutant in lake, lake volume, lake present situation pollutant levels, lake outflow, contaminant degradation coefficient, time segment length etc.
Exporting data is the maximum water environment capacity in each lake.
2) typical scene analogue unit:
Comprise typical wind field, burst pollution thing and heavy rain Scene Simulation; Special parameter is set respectively and enters scheduling scheme analogue unit, complete subsequent operation;
3) scheduling scheme analogue unit:
By arranging different water diversion flow, boundary condition, roughness, temperature, the discharge capacity of point source pollutant and concentration, Yangtze River Water body pollution substrate concentration, bed mud dissolve and release coefficient, finite volume method on orthogonal grid is adopted to solve two dimension flow water quality math equation, calculate all grids at the not depth of water, flow rate units mean value in the same time, water quality cell-average value;
Input data: the discharge capacity of orthogonal cells file, end elevation file, critical depth of water, critical flow velocity, critical reconstruct flow velocity, lake roughness coefficien, CFL number, design discharge, Yangtze River Water body pollution substrate concentration, point source pollutant and concentration, simulation initial time, the simulation end time etc.;
Export data: all nodes at the not depth of water, flow rate units mean value in the same time, water quality cell-average value, water environment state.
The numerical simulation of scheduling engineering water correction provided by the invention and visual simulation system, the process of carrying out visual simulating is: adopt the structured grid with local refinement feature to divide lake simulating area; Rely on lake water quality On-Line Dynamic Monitoring module, obtain initial hydrology-water quality and lake flow information; Again by lake group's Hydrology loop module and lake distributed flow field computing module, intuitively portray and show lake region water body Natural Circulation and the space-time characterisation manually circulated and development law; Based on lake water quality Analysis of water environment module, consider the impact of the factors such as earth Corrioli's effect, wind-stress, sewage draining exit, scheduling engineering, each pollutant phase Self-variation rule and hydrometeorological condition, simulate contaminant transportation process under various complicated landform, complicated weather and Complex Flow Status; Finally, set up digital lake Visual Simulation System, utilize GIS technology to carry out visualization processing to analog result, lake region rainfall-runoff, flow field, Pollutants Diffusion, the scheduling process situation that becomes more meticulous is deduced and history is reappeared, realizes the visual of lake water quality Water Environment Simulation process.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should look protection scope of the present invention.
Claims (3)
1. dispatch numerical simulation and the visual simulation system of engineering water correction for one kind, it is characterized in that, this system adopts service-oriented system and continuous integrating method, integrated lake water quality On-Line Dynamic Monitoring module, lake group's Hydrology loop module, distributed flow field, lake computing module, lake water quality Analysis of water environment module and digital lake Visual Simulation System;
Wherein, described lake water quality On-Line Dynamic Monitoring module is used for: with asynchronous servo Web Service form, receive and process each information source issue lake attribute information, and with temporal index form, this lake attribute information is organized, analyze and share; Wherein, described lake attribute information comprises: initial flow-field information and water quality information;
Described lake group's Hydrology loop module comprises: base water rain condition information management unit and distributed product runoff concentration calculation unit; Wherein, described base water rain condition information management unit for storing, the physical geography information of sharing and management lake region and history watermark protocol observation data; Described distributed product runoff concentration calculation unit is used for: adopt the structured grid with local refinement feature, the simulating area of lake region is divided into the element grid that several have horizontal connection and vertical contact; Then, adopt the lake group's water circulation space-time model based on distributed grid Xinanjiang model, the product calculating each element grid respectively confluxes and all kinds of contaminant capacity;
Distributed flow field, described lake computing module is used for: first load and check underwater digit elevation model DEM in computational fields, setting gradually each sluice gate, the water diversion flow of pumping plant and the initial launch water level in each lake; Then choose wind item ambient field in computational fields, with two-dimensional shallow water equation for flow cavitation result equation, integrated and adopt the high precision finite volume model on self-adaptation rectangular node to solve, simulation obtains lake region Flow Field Distribution situation;
Described lake water quality Analysis of water environment module is used for: the spatio-temporal segmentation setting up the change of lake pollution thing, carries out prediction and calculation on the different scheduling scheme of Lake Water network regulation degree engineering to the impact of water quality;
Described digital lake Visual Simulation System is used for: be two by water correction numerical simulation result treatment, three-dimensional scene deduces animation;
Described digital lake Visual Simulation System comprises: analog result visualization processing unit, two-dimentional display unit and three-dimensional display unit;
Wherein, analog result visualization processing unit is used for: complete the work for the treatment of of analog result to grid information by the GIS service being distributed on server end, specifically comprise the following steps:
S1: format analogue unit, concrete steps are as follows: (1) extracts the geometric center information of each analogue unit; (2) knot vector data set is generated; (3) each internodal processing order index chain of generation is calculated; (4) by Delaunay rule, connect each node successively, make all analogue units all be contained in continuous and nonoverlapping triangular net;
S2: initialization scheduling engineering water correction numerical simulation result, generates ASCII character data stream;
S3: setup times step-length, generates the key frame queue of scheduling engineering water correction process;
S4: the queue sequence generated by S3, batch processing key frame, concrete steps are as follows: the triangular mesh that (1) generates according to S1, and on each summit, place inserts the prediction term analogue value successively; (2) imitative TIN TIN structure, the pseudo-terrain data structure of the generation forecast item analogue value; (3) along " landform " domatic interpolation; (4) output sizing grid is set, the pseudo-terrain data after interpolation is converted to raster data; (4) along analogue unit border and physical constraint border cuts raster data; (5) multiple grade section is set, reclassification raster data; (6) the visualization processing work of all key frames is completed successively;
S5: result is stored into spatial database;
Two dimension display unit is used for: utilize WPF and ArcGIS API for WPF that each module result of calculation is carried out two dimension and dynamically play up and visual presentation; Wherein, WPF full name is: Windows Presentation Foundation, is the user interface frame based on Windows Vista that Microsoft releases;
Concrete, two-dimentional display unit is by rewriting TiledMapServiceLayer, that is: map section service layer, carries out the displaying of 2 D animation; First, client inherits TiledMapServiceLayer, obtains section by GetUrl () method, that is: use GetUrl statement to obtain section; Return the URL(uniform resource locator) Url of ExportMap splicing in REST SDK, thus achieve the buffer memory layer display mode of dynamic data;
Wherein, REST specifies the Software for Design style of an adopted shelving structure constraint condition and principle; SDK refers to SDK (Software Development Kit); ExportMap define for SDK one is for exporting the class of picture;
Three-dimensional display unit is used for: the geographical information visualization inquiry and the three-dimensional rendering function of operating function and OSG that utilize the terrain modeling function of VPB, OSG-GIS, carries out dynamically playing up of Visualization Modeling and analog result to lake region; Wherein, VPB full name is VirtualPlanetBuilder, is that a kind of topographic database creates instrument; OSG full name is OpenSceneGraph, for using OpenGL technological development, is a set of application programming interfaces based on C++ platform;
Concrete, three-dimensional display unit adopts C++ to develop, analog result with the formal notation of color vector on dimensional topography; Three-dimensional water surface effect is the simulation adopting water level fluctuation method and discrete fourier transform method to realize current, adopts OpenGL to carry out the mapping of texture or particle effect shows in emulation platform, thus display emulated interface true to nature.
2. the numerical simulation of scheduling engineering water correction according to claim 1 and visual simulation system, it is characterized in that, described lake water quality Analysis of water environment module comprises:
Lake water environment capacity computing unit: for calculating the maximum water environment capacity in each lake of river network of lake region, be specially: according to lake type, adopts uniform mixture model, non-uniform mixing model or eutrophication model to calculate the water environment capacity in lake;
Typical scene analogue unit: for according to observational data, thematic map, monitoring station measured data, use the lake pollution thing migration models based on finite volume method, comprehensive simulation is carried out to the lake water quality under typical context wind field, burst pollution thing or heavy rain sight;
Scheduling scheme analogue unit: lake attribute information, lake group's Hydrology loop module for obtaining based on lake water quality On-Line Dynamic Monitoring module scheduling time of forecasting hydrographic information in interval and the product of each element grid confluxes and all kinds of contaminant capacity, distributed flow field, lake computing module are analyzed scheduling time interval in information of flow, process is improved to the lake water quality between given scheduling scheme implementation period and carries out numerical simulation.
3. the numerical simulation of scheduling engineering water correction according to claim 2 and visual simulation system, it is characterized in that, described lake water quality Analysis of water environment module is also based on fluid dynamics, establish lake pollution thing water quality migration models based on finite volume method, specifically comprise chemical oxygen demand COD water quality migration models, total phosphorus TP water quality migration models and total nitrogen TN water quality migration models.
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