CN113743032A - Method for determining optimal running water circulation scheme of urban river network based on MIKE 11 - Google Patents
Method for determining optimal running water circulation scheme of urban river network based on MIKE 11 Download PDFInfo
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- CN113743032A CN113743032A CN202111009413.2A CN202111009413A CN113743032A CN 113743032 A CN113743032 A CN 113743032A CN 202111009413 A CN202111009413 A CN 202111009413A CN 113743032 A CN113743032 A CN 113743032A
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Abstract
The invention provides a method for determining an optimal running water circulation scheme of an urban river network based on MIKE 11, which comprises the following steps: 1) collecting basic data; 2) designing a running water circulation scheme based on the collected basic data; 3) constructing an urban river network hydrodynamic-water quality model through a hydrodynamic module and a water quality module of MIKE 11 software based on the collected basic data; 4) simulating a designed running water circulation scheme based on the constructed model; 5) adjusting and improving simulation parameters, and optimizing a running water circulation scheme. The optimal running water circulation scheme is preferably selected by means of numerical simulation, multiple targets such as running water effect, economic cost, reliability and flexibility are considered, and the urban water resource management and water environment improvement decision-making work is greatly assisted.
Description
The technical field is as follows:
the invention relates to the field of urban water environment comprehensive treatment and water resource management, in particular to a method for determining an optimal running water circulation scheme of an urban river network based on MIKE 11.
Background art:
with the continuous propulsion of ten items of water, the watershed water environment treatment target is changed into water activity, clear water and beautiful water. However, in the current urban water environment treatment, systematic performance, cyclicity and balance performance are still lacked, especially, in the running water circulation engineering, the randomness and the transition performance of the design and the operation of a water regulation system still exist, for example, the running water circulation engineering excessively depends on a gate pump system in a city, a water supplementing route is ideally designed, water is supplemented randomly, the water supplementing range has limitation, even a plurality of reverse water regulation and other problems, and the water regulation facilities in the existing running water circulation system are similar to a nominal water regulation facility due to the fact that the running cost is too high. How to improve the water flow exchange capacity and hydraulic connectivity of a complex topological characteristic river network in a city, enhance the water body fluidity, improve the water environment capacity, improve the water quality, ensure the balance of marginal cost and benefit of the running water circulation engineering, finally realize the minimum treatment cost and the maximum benefit, and become a big problem of the design of the current running water circulation scheme. Therefore, the running water circulation scheme is continuously optimized by a water environment numerical simulation means, and the running water circulation scheme has practical significance in high-benefit and low-cost application.
The invention content is as follows:
in order to overcome the defects, the invention provides a method for determining the optimal running water circulation scheme of the urban inland river system based on the MIKE 11 model, the running water circulation scheme is continuously optimized and adjusted by means of numerical simulation, the optimal running water circulation scheme is finally selected, and multiple targets such as the running water effect, the economic cost, the reliability and the flexibility are considered.
The invention discloses a method for determining an optimal running water circulation scheme of an urban river network based on MIKE 11, which comprises the following steps:
1) collecting basic data;
2) designing a running water circulation scheme based on the collected basic data;
3) constructing an urban river network hydrodynamic-water quality model through a hydrodynamic module and a water quality module of MIKE 11 software based on the collected basic data;
4) simulating a designed running water circulation scheme based on the constructed model;
5) adjusting and improving simulation parameters, and optimizing a running water circulation scheme.
Further, the collected basic data at least comprises topological characteristics of urban river network water systems, river section data, hydrological meteorological data and water quality status data.
Further, the step 2) is specifically: and determining whether the urban river network needs to be supplemented with water or not, determining the water supplementing time and the water supplementing amount and further determining a high-quality water supplementing source area by a basin water requirement calculation method based on the collected basic data.
Further, the step 4) is specifically:
an urban river network hydrodynamic-water quality model constructed based on MIKE 11 is used for calibrating the roughness of a river channel and the diffusion coefficient and attenuation coefficient of water quality indexes, and the precision of the model is verified from the perspective of water level, flow and water quality concentration; analyzing hydrodynamic characteristics of the urban river network through a calibrated and verified model, wherein the hydrodynamic characteristics comprise river flow direction, hydraulic connection and water storage distribution characteristics;
further, the step 5) specifically comprises: simulating a designed running water circulation scheme based on the constructed model, and evaluating the effect and the engineering quantity of the running water circulation scheme; and optimizing and scheduling the water flow and the water flow route based on the preliminary simulation result, adjusting and improving the water flow route, and optimizing the layout position, scale and scheduling combination of water-transfer facilities, so that the optimal water flow effect is realized under the condition of the lowest engineering quantity, and the construction process of the water flow circulation system is more scientific and reasonable.
The optimal running water circulation scheme is preferably selected by means of numerical simulation, multiple targets such as running water effect, economic cost, reliability and flexibility are considered, and the urban water resource management and water environment improvement decision-making work is greatly assisted.
Description of the drawings:
fig. 1 is a schematic flow chart of the method for determining the optimal urban inland river system running water circulation scheme based on the MIKE 11 model.
The specific implementation mode is as follows:
the present invention will now be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, the method for determining the optimal city inland river system running water circulation scheme based on MIKE 11 model of the present invention includes collecting data, collecting hydrological weather, river underwater topography, water system current situation (water level, flow rate, water quality, etc.) and related gate and pump data of the city inland river system, calculating running water circulation water demand of the city inland river system, and designing a corresponding ecological water supplement scheme from the perspective of enhancing water body fluidity and water environment capacity; the method comprises the following steps:
(1) through data collection and in-situ observation, basic data and data such as surface water resource conditions, topographic data, river channel underwater section data, river channel water level and flow data, river channel flow velocity and flow direction data, water quality data, meteorological data, gate dam pump culvert and the like in the city are obtained.
(2) By means of the collected data and data, the current situation of the hydrodynamic force and the water quality of the urban river network is known, the reasons of poor water body fluidity and hydraulic connection disjointing of the river network are analyzed at the same time, and the water demand of the running water of the river channel is calculated;
(3) the available water source areas in cities are investigated: the source of the running water includes, but is not limited to, lakes, reservoirs, rivers, reclaimed water, and the like; the water transfer allowance of the available water source is demonstrated; demonstrating the water transfer time of an available water source place;
(4) designing a high-quality running water circulation scheme, preliminarily determining the water distribution amount of each river channel through hydrological and hydraulic calculation, designing a running water route as close to the natural flow direction as possible, preferably selecting an annular running water route, preferably selecting a multi-circulation running water form of large circulation and small circulation, appropriately supplementing corresponding water distribution projects on the basis of fully utilizing other engineering facilities such as gate pumps and the like, and determining the arrangement position, type and scale of running water engineering measures. The designed running water circulation scheme can increase the communication route of the river channel to form a regional water network of the system.
On the basis of collected data, aiming at topological characteristics and water flow characteristics of the urban river network complexity, an urban inland river water system one-dimensional hydrodynamic-water quality model is constructed based on HD and AD modules of an MIKE 11 model, a designed urban river network area water supplementing and flowing scheme is simulated, scheme optimization is carried out from the aspects of hydrodynamic activity, water quality recovery effect, economic cost and the like, and the optimal flowing water circulation scheme is finally selected.
(1) Constructing an urban river network hydrodynamic-water quality model based on MIKE 11, calibrating the diffusion coefficient and the attenuation coefficient of river roughness and water quality indexes, and verifying the precision of the model from the angles of water level, flow, water quality concentration and the like; analyzing hydrodynamic characteristics of the urban river network through a calibrated and verified model, wherein the hydrodynamic characteristics comprise river flow direction, hydraulic connection and water storage distribution characteristics;
(2) simulating a designed running water circulation scheme based on the constructed model, and evaluating the effect and the engineering quantity of the running water circulation scheme; and optimizing and scheduling the water flow and the water flow route based on the preliminary simulation result, adjusting and improving the water flow route, and optimizing the layout position, scale and scheduling combination of water-transfer facilities, so that the optimal water flow effect is realized under the condition of the lowest engineering quantity, and the construction process of the water flow circulation system is more scientific and reasonable.
(3) And evaluating the comprehensive effect of the finally recommended optimized running water circulation scheme.
In summary, the scheme of the invention is to firstly collect data and investigate the current situation, calculate the circulating water demand of the city inland river system running water, and design a corresponding ecological water supplementing scheme from the aspects of enhancing the water body fluidity and improving the water environment capacity. And then constructing a one-dimensional hydrodynamic-water quality model of the urban inland river water system based on HD and AD modules of the MIKE 11 model, simulating a designed urban river network area water replenishing and running scheme, optimizing the scheme from the aspects of hydrodynamic activity, water quality recovery effect, economic cost and the like, and finally selecting the optimal running water circulation scheme.
Wherein the content of the first and second substances,
(1) the data collection comprises the following steps: hydrometeorological data, regional topographic data, river underwater topographic data, hydrodynamic (flow direction, flow rate, etc.) data, water environment data (water concentration, etc.);
(2) the presence survey includes: water system distribution, water environment quality condition, existing and planned hydraulic engineering data, point source and surface source pollution condition, sewage treatment system condition, water environment remediation measures and the like;
(3) by means of the collected data and data, the current situation of the hydrodynamic force and the water quality of the urban river network is known, the reasons of poor water body fluidity and hydraulic connection disjointing of the river network are analyzed at the same time, and the water demand of the running water of the river channel is calculated;
(4) the available water source areas in cities are investigated: the source of the running water includes, but is not limited to, lakes, reservoirs, rivers, reclaimed water, and the like; the water transfer allowance of the available water source is demonstrated; demonstrating the water transfer time of an available water source place;
determining the water supplement amount range: the water quantity required by the circulation of the running water can be calculated by various methods, including calculating the water replenishing quantity required by the water quality grade which needs to reach a certain standard by a water quality target constraint method; and calculating the ecological water demand of each river of the urban river network by using an ecological water demand calculation method comprising a water balance method, a Mongolian method and the like. And comparing and analyzing the water replenishing quantity required by the calculation under different methods, and determining the water replenishing quantity range required by the regional surface water. Under the condition that the water quantity of the water replenishing water source is sufficient and far larger than the calculated water demand, trial calculation can be carried out on the basis of the constructed urban river network hydrodynamic force-water quality model, and the total water intake quantity is optimized.
(5) Designing a high-quality running water circulation scheme, preliminarily determining the water distribution amount of each river channel through hydrological and hydraulic calculation, designing a running water route as close to the natural flow direction as possible, preferably selecting an annular running water route, preferably selecting a multi-circulation running water form of large circulation and small circulation, appropriately supplementing corresponding water distribution projects on the basis of fully utilizing other engineering facilities such as gate pumps and the like, and determining the arrangement position, type and scale of running water engineering measures. The designed running water circulation scheme can increase the communication route of the river channel to form a regional water network of the system.
Determining a water replenishing point: determining water replenishing point positions based on the constructed urban river network hydrodynamic force-water quality model by combining urban flood control requirements, river water quality requirements and ecological base flow of rivers, designing different water replenishing points and different water replenishing quantity combination working conditions on the premise of not influencing flood control and drainage, comparing river flowing power and water quality change promoting effects under different working conditions, and selecting the optimal water replenishing point position-water replenishing quantity working condition;
determining a gate pump scheduling scheme: based on the constructed urban river network hydrodynamic force-water quality model, simulating the river flow, flow rate and water quality after the designed running water circulation scheme is implemented, and continuously adjusting the gate opening degree, pump station scale, lift and pressure pipeline length until the river hydrodynamic force-water quality condition has the largest lifting amplitude and the lowest engineering measure cost, thereby obtaining the optimal gate pump scheduling scheme;
the preferred embodiments of the present invention have been described in detail, but the scope of the present invention is not limited thereto, and various equivalent changes can be made to the technical solution of the present invention within the technical spirit of the present invention, and these equivalent changes are included in the scope of the present invention.
Claims (5)
1. A method for determining the optimal running water circulation scheme of an urban river network based on MIKE 11 is characterized by comprising the following steps: the method comprises the following steps:
1) collecting basic data;
2) designing a running water circulation scheme based on the collected basic data;
3) constructing an urban river network hydrodynamic-water quality model through a hydrodynamic module and a water quality module of MIKE 11 software based on the collected basic data;
4) simulating a designed running water circulation scheme based on the constructed model;
5) adjusting and improving simulation parameters, and optimizing a running water circulation scheme.
2. The method for determining the optimal running water circulation scheme for urban river networks based on MIKE 11 according to claim 1, wherein: the collected basic data at least comprises topological characteristics of urban river network water systems, river section data, hydrological meteorological data and water quality current situation data.
3. The method for determining the optimal running water circulation scheme for urban river networks based on MIKE 11 according to claim 1, wherein: the step 2) is specifically as follows: and determining whether the urban river network needs to be supplemented with water or not, determining the water supplementing time and the water supplementing amount and further determining a high-quality water supplementing source area by a basin water requirement calculation method based on the collected basic data.
4. The method for determining the optimal running water circulation scheme for urban river networks based on MIKE 11 according to claim 1, wherein: the step 4) is specifically as follows:
an urban river network hydrodynamic-water quality model constructed based on MIKE 11 is used for calibrating the roughness of a river channel and the diffusion coefficient and attenuation coefficient of water quality indexes, and the precision of the model is verified from the perspective of water level, flow and water quality concentration; and analyzing the hydrodynamic characteristics of the urban river network through a calibrated and verified model, wherein the hydrodynamic characteristics comprise river flow direction, hydraulic connection and water storage distribution characteristics.
5. The method for determining the optimal running water circulation scheme for urban river networks based on MIKE 11 according to claim 1, wherein: the step 5) is specifically as follows: simulating a designed running water circulation scheme based on the constructed model, and evaluating the effect and the engineering quantity of the running water circulation scheme; and optimizing and scheduling the water flow and the water flow route based on the preliminary simulation result, adjusting and improving the water flow route, and optimizing the layout position, scale and scheduling combination of water-transfer facilities, so that the optimal water flow effect is realized under the condition of the lowest engineering quantity, and the construction process of the water flow circulation system is more scientific and reasonable.
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