CN118095689A - Flood storage area flood advance and retreat cooperative scheduling method - Google Patents
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Abstract
The invention discloses a flood storage area flood advance and retreat cooperative scheduling method, which comprises the following steps: (1) determining a flood storage zone Hong Guimo; (2) The flood inlet mode of the flood storage area adopts a gate-building flood inlet mode, and the flood discharge mode adopts a gate-opening flood discharge mode and a gate-closing pump station pump drainage mode; (3) determining the positions of the flood gate and the flood gate; (4) According to the current topography of the flood storage area, constructing ecological wetland of the flood storage area according to the principle of minimum engineering quantity, and screening out plants with purifying capacity and water flooding resistance for configuration; (5) And the flood storage area selects a flood transporting and advancing working condition, a flood discharging working condition or a wetland working condition according to actual needs. The method can slow down the mutual influence of the ecological wetland function and the flood storage function of the flood storage area, and plays a role in flood storage when the flood storage area is in the river basin and exceeds the standard flood; and when no super-standard flood occurs, the ecological wetland function is exerted.
Description
Technical Field
The application relates to the technical field of flood dispatching and wetland function protection, in particular to a flood advance and retreat cooperative dispatching method for a flood storage area.
Background
The traditional flood storage area is mainly used as an area for storing flood, when the standard flood is exceeded, the flood storage area opens a gate or takes off a gate to enter flood, the flood storage function is exerted, and the flood control pressure is relieved. The ecological wetland flood storage area is used as an ecological wetland area for realizing the functions of water purification, biodiversity protection, science popularization and education and the like when no over-standard flood occurs. The ecological wetland flood storage area can solve the flood problem and the ecological problem, but the ecological wetland flood storage area faces the following problems: how to ensure that the ecological wetland function of the flood storage area does not influence the flood storage function, and how to reduce the influence of advancing and retreating flood on the ecological wetland function as much as possible.
Disclosure of Invention
In order to solve the problems in the background technology, the application provides a method for collaborative scheduling of flood advance and retreat in a flood storage area.
The application provides a flood storage area flood advance and retreat cooperative scheduling method, which comprises the following steps:
(1) Determining a flood storage distinguishing scale, wherein the flood storage distinguishing scale at least comprises a flood diversion water level, a full duration and a full water level;
(2) The flood inlet mode of the flood storage area adopts a gate-building flood inlet mode, and the flood discharge mode adopts a gate-opening flood discharge mode and a gate-closing pump station pump drainage mode;
(3) Determining alternative positions of the flood gate and the flood gate; building a river physical model at an alternative position of the flood storage area, respectively simulating sluice overflow processes when the flood inlet sluice and the flood outlet sluice enter and withdraw flood at different alternative positions by using the model, and determining the positions of the flood inlet sluice and the flood outlet sluice by comparing sluice discharge quantity, flow velocity distribution and water flow state under selected flood inlet and flood outlet working conditions, and implementing difficulty and investment economic reasonable factors;
(4) According to the current topography of the flood storage area, constructing an ecological wetland for the flood storage area according to the principle of minimum engineering quantity, wherein the constructed ecological wetland at least comprises a wetland purification area, and screening plants with purification capacity and water flooding resistance for configuration;
(5) The flood storage area comprises three working conditions: flood inlet working conditions, flood discharge working conditions and wetland operation working conditions;
under the flood inlet working condition, the flood inlet gate is started to carry out flood inlet according to unified scheduling of the flood control command part, and the flood inlet gate is closed according to flood control requirements of the river basin in the flood inlet process so as to reserve a flood storage space;
under the flood-discharging working condition, opening a flood-discharging gate to discharge flood according to the integral flood-controlling arrangement of the river basin; when the water level of the river basin falls below the warning level, closing the flood discharge gate according to the living demand generated in the flood storage area, and starting a pump station in the polder to pump and discharge bottom water;
Under the operation condition of the wetland, the flood inlet gate and the flood outlet gate are closed, the flood inlet gate is opened, the water body in the drainage basin is introduced into the flood storage area through the water distribution main canal, automatically flows into each wetland unit in the wetland purification area, and is pumped and discharged from the drainage station to the drainage basin after being purified by the wetland units.
In some embodiments, determining a flood storage differentiation flood scale comprises:
constructing a hydrodynamic mathematical model of a river basin in which the flood storage area is positioned, and coupling the river channel in the river basin, a pump station and the flood storage area;
And carrying out model annual adjustment on flood by using a hydrodynamic mathematical model, comparing and analyzing the excess flood treatment scheme of the river basin, and determining flood storage distinguishing flood scale.
In some embodiments, selecting plants that are purifying and water flooding resistant for deployment comprises:
According to the data, arranging the plants which survive after the flood storage area is in the river basin and generates large water, and establishing a plant selection front list table; and screening plants which meet the functional requirements of the wetland and have the purification capability and water flooding resistance from the front list table, and carrying out plant configuration.
Compared with the prior art, the application has the following advantages and beneficial effects:
The scheduling method can slow down the mutual influence of the ecological wetland function and the flood storage function of the flood storage area, can play a role in flood storage when the flood storage area is in the river basin and exceeds the standard flood, reduce flood peaks and relieve flood control pressure; when the river basin is not subjected to the over-standard flood, the ecological wetland function is exerted, and the ecological environment of the river basin is improved.
Drawings
Fig. 1 is a schematic flow chart of an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The following will describe the concrete implementation process of the flood storage area flood advance and retreat cooperative scheduling method in detail, and the steps are as follows:
(1) And (3) determining a flood storage area Hong Guimo according to flood control planning of a river basin where the flood storage area is located, wherein the flood storage area comprises at least a flood storage water level, a full duration and a full water level of the flood storage area.
The flood storage zone Hong Guimo determined by the present application is the flood diversion scale subject to the basin flood schedule. In the embodiment, a water basin hydrodynamic force mathematical model is constructed by MIKE software, and the water basin hydrodynamic force mathematical model is used for carrying out numerical simulation on water basin hydrology to determine flood storage and flood distinguishing scale. Specifically, river channels, pump stations, flood storage areas and the like in the flow areas are coupled to construct a river basin hydrodynamic mathematical model, flood model annual adjustment is performed by using the river basin hydrodynamic mathematical model, an excess flood treatment scheme of the river basin is analyzed and proposed, and flood storage area flood diversion scale is determined, namely flood diversion scale obeying the river basin flood scheduling.
(2) And the flood storage area and the ecological wetland are comprehensively combined, and the flood advancing and retreating mode of the flood storage area is determined.
At present, the flood storage area flood inlet mode comprises the steps of opening and flood inlet and gate construction and flood inlet. The flood discharge has 2 schemes of opening and closing the gate and pumping the pump station. The flood inlet water head difference is large, the flood destructive power is strong, the problems that flood inlet cannot be effectively controlled, re-blocking is difficult, flood withdrawal speed is difficult to meet production and life recovery requirements and the like exist often, and timeliness is poor. The flood diversion device has the advantages that flood diversion can be effectively performed in time by gate construction and flood inlet, flexible scheduling and repeated starting are facilitated, flood withdrawal can be controlled according to flood conditions during flood withdrawal, bottom water in a flood storage area is discharged as soon as possible, and favorable conditions are provided for normal operation of ecological wetland. According to comparison analysis, the method is preferably used for building a gate and entering flood, namely opening the gate and entering flood when the super-standard flood occurs, so that flood control pressure in the peripheral area of the city is relieved; when flood is removed, the pump station in the polder is used for pumping and discharging in a timely closing manner.
(3) And the flood storage area and the ecological wetland are comprehensively combined, and the flood inlet and outlet positions are determined.
The main purpose of flood storage area flood feeding and discharging is to cut down the peak flow and divide flood, so flood feeding gate should be built on the upstream and flood discharging gate should be built on the downstream; the flood gate and the flood withdrawal Hong Zha can be selected to be built together according to the topography and the topography of different flood storage areas. In determining the specific gate addresses of the flood gate and the flood gate, the damage to the wetland caused by flushing should be reduced as much as possible during the flood driving and driving. The application adopts river physical model to simulate, compares and selects gate addresses, and proposes flood inlet and outlet position advice from the aspects of inlet Hong Gongkuang discharge capacity, flow velocity distribution, water flow state, navigation water flow condition and the like. The river physical model is a conventional technical means for analyzing sluice overflow, which is to construct a physical model by reducing the real object in equal proportion, and to analyze sluice overflow by simulating sluice overflow for the physical model.
According to the characteristics of flood control, flood inlet (flood outlet) and the like of the flood inlet and outlet gate, the factors of topography, geological conditions, water flow state, control and operation and the like are combined, so that water inlet (flood outlet) Hong Zha and water inlet and outlet are smooth as much as possible in a limited range, the engineering quantity is small, and the investment is saved. A preferred scheme is as follows: the flood inlet and flood outlet working conditions are designed, the sluice discharge meets the planning requirement, the flow velocity distribution of each sluice hole is uniform, the water flow at the upstream and downstream of the sluice is smooth, and the overall flow state is good. The engineering is easy to implement, and the investment is economical and reasonable. The ecological wetland flood storage area is considered to reduce the scouring damage to the wetland in the process of advancing and retreating flood.
(4) And constructing an ecological wetland flood storage area.
The present application performs engineering layout according to local conditions based on the present topography and topography of the flood storage area and the periphery thereof. Specifically, according to local conditions, an ecological wetland with strong self-adaption, self-recovery and self-regulation capacity is constructed. The method does not adopt a wetland type with large excavation and large water surface, but carries out engineering layout according to the current topography and topography, and the principle of minimum engineering quantity and according to local conditions, and can take the region with lower topography as a wetland purifying region and the region with higher topography as a forest and grass wetland region. And screening proper plants for configuration, namely, in plant selection, arranging the plants which survive after the water in the water domain is generated by utilizing news reports, live-action photos, water damage statistics and other data, and establishing a plant selection front list table. Preferentially screening water-logging-resistant plants meeting the requirements of a wetland purification area and a forest and grass wetland area from a list table, and laying a foundation for quickly recovering the ecological wetland. Based on the method, the ecological wetland with high self-adaption, self-recovery and self-regulation capacity can be obtained.
(5) And (5) the flood storage area advances and retreats to cooperatively schedule flood.
The ecological wetland flood storage area mainly has 3 working conditions: flood inlet conditions, flood discharge conditions and wetland operation conditions.
Under flood inlet working conditions, flood control command parts are subjected to unified scheduling to open the flood inlet gate. Specifically, when the river basin is subjected to out-of-standard flood and the downstream is subjected to jacking to obviously influence flood drainage, the flood gate is opened. After flood entering, the flood control system can be flexibly scheduled according to flood control requirements of the river basin, and the gate is closed timely, so that a flood storage space is reserved, and the flood control system is convenient to reuse.
Under flood-discharging working condition, the flood-discharging gate is opened to discharge water according to the principle of integral flood-controlling arrangement of the river basin and the factors of influence of the difference of water level between the inside and outside on the embankment and the building safety. When the water level of the river basin falls below the warning level and the water is slowly discharged, or the production life in the polder is restored as soon as possible, the flood discharge gate can be closed, and the pump station in the polder is started to pump and discharge the bottom water.
Under the operation condition of the wetland, the flood inlet gate and the flood outlet gate are closed, the wetland flood inlet gate is opened, the water body in the drainage basin is introduced into the ecological wetland flood storage area through the distribution main canal, automatically flows into each wetland unit, and is finally pumped and discharged to the drainage basin from the drainage station after being purified by the wetland units. Under the operation condition of the wetland, the flood storage area is operated as an ecological wetland, plays roles of wetland purification, ecological restoration and the like, and is beneficial to promoting the improvement of the ecological environment of the river basin.
Examples
In the embodiment, the eighteen-link polder flood storage area is taken as a target flood storage area, the eighteen-link polder flood storage area is one of the flood storage areas at the position of the nest lake basin planning 9, and the flood diversion water level, full duration and full water level of the eighteen-link polder flood storage area are required to be subjected to the nest lake basin flood scheduling. And establishing a hydrodynamic mathematical model of the river basin of the nest lake by utilizing MIKE software, coupling a river channel, a pump station, a flood storage area and the like in the river basin, comparing and analyzing an excess flood treatment scheme on the gate of the nest lake by means of model adjustment, and determining the flood diversion water level, full duration and full water level of the target flood storage area. In the embodiment, the flood diversion water level adopts 12.75m of 50-year-first flood level of the nest lake, the flood is stored for 3 days (corresponding to 450m 3/s of flood inlet flow), and the highest flood storage water level is 13.36m of hundred-year-first flood level of the nest lake.
In this embodiment, the flood inlet gate and the flood outlet gate are closed, and are arranged on the left dike of the south fei river at the position about 200m downstream of the sand river opening of the target flood storage area. The discharge capacity of the flood inlet gate and the flood outlet gate meets the planning requirement, the flow velocity of each gate hole is uniformly distributed, the water flow at the upstream and downstream of the flood outlet gate is smooth, and the overall flow state is good. The sedimentation pond in the constructed second-stage wetland engineering is behind the regional dyke, the water surface width is 200-450 m, the difficult problem of bidirectional energy dissipation and scour prevention is solved during flood inlet and outlet, and the energy dissipation effect is good.
In this example, the selected flood resistant plants include, but are not limited to, submerged plants (e.g., hydrilla verticillata, goldfish algae), emergent plants (e.g., rice, reed), floating plants (e.g., lotus, water chestnut), and woody plants (e.g., huperzia, metasequoia). The wetland purification area is configured by selecting submerged plants and floating plants, and the wetland area is configured by selecting emergent plants and woody plants.
When the flood level of the south fei river or the nest lake is obviously reduced, the flood control arrangement of the whole river basin is not influenced, and in combination with factors such as the influence of the difference of the internal water level and the external water level on the embankment and the safety of the building, the flood discharge gate is started to discharge water. When the water level of the nest lake falls below the warning water level of 10.5m, and the water in the flood storage area is slowly withdrawn, in order to recover the production and life in the polder as soon as possible, the flood withdrawal gate is closed, and the pump station in the flood storage area is started for pumping and draining so as to drain the bottom water as soon as possible. In the embodiment, the total drainage flow of the target flood storage area is 40.95m 3/s, the time is about 9 days, the water logging of the polder can be reduced from 10.5m to 8.6m, and the drainage scale of the pump station and the drainage facility basically meet the requirements of recovering the normal operation of the wetland as soon as possible.
Note that the above is only a preferred embodiment of the present application and the technical principle applied. It will be understood by those skilled in the art that the present application is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the application. Therefore, while the application has been described in connection with the above embodiments, the application is not limited to the above embodiments, but may include many other equivalent embodiments without departing from the spirit of the application, which fall within the scope of the application.
Claims (3)
1. A flood storage area flood advance and retreat cooperative scheduling method is characterized by comprising the following steps:
(1) Determining a flood storage distinguishing scale, wherein the flood storage distinguishing scale at least comprises a flood diversion water level, a full duration and a full water level;
(2) The flood inlet mode of the flood storage area adopts a gate-building flood inlet mode, and the flood discharge mode adopts a gate-opening flood discharge mode and a gate-closing pump station pump drainage mode;
(3) Determining alternative positions of the flood gate and the flood gate; building a river physical model at an alternative position of the flood storage area, respectively simulating sluice overflow processes when the flood inlet sluice and the flood outlet sluice enter and withdraw flood at different alternative positions by using the model, and determining the positions of the flood inlet sluice and the flood outlet sluice by comparing sluice discharge quantity, flow velocity distribution and water flow state under selected flood inlet and flood outlet working conditions, and implementing difficulty and investment economic reasonable factors;
(4) According to the current topography of the flood storage area, constructing an ecological wetland for the flood storage area according to the principle of minimum engineering quantity, wherein the constructed ecological wetland at least comprises a wetland purification area, and screening plants with purification capacity and water flooding resistance for configuration;
(5) The flood storage area comprises three working conditions: flood inlet working conditions, flood discharge working conditions and wetland operation working conditions;
under the flood inlet working condition, the flood inlet gate is started to carry out flood inlet according to unified scheduling of the flood control command part, and the flood inlet gate is closed according to flood control requirements of the river basin in the flood inlet process so as to reserve a flood storage space;
under the flood-discharging working condition, opening a flood-discharging gate to discharge flood according to the integral flood-controlling arrangement of the river basin; when the water level of the river basin falls below the warning level, closing the flood discharge gate according to the living demand generated in the flood storage area, and starting a pump station in the polder to pump and discharge bottom water;
Under the operation condition of the wetland, the flood inlet gate and the flood outlet gate are closed, the flood inlet gate is opened, the water body in the drainage basin is introduced into the flood storage area through the water distribution main canal, automatically flows into each wetland unit in the wetland purification area, and is pumped and discharged from the drainage station to the drainage basin after being purified by the wetland units.
2. The flood storage area flood advance and retreat cooperative scheduling method as claimed in claim 1, wherein:
The determining a flood storage differentiation flood scale comprises:
constructing a hydrodynamic mathematical model of a river basin in which the flood storage area is positioned, and coupling the river channel in the river basin, a pump station and the flood storage area;
And carrying out model annual adjustment on flood by using a hydrodynamic mathematical model, comparing and analyzing the excess flood treatment scheme of the river basin, and determining flood storage distinguishing flood scale.
3. The flood storage area flood advance and retreat cooperative scheduling method as claimed in claim 1, wherein:
The screening out plants with purifying capacity and water logging resistance is configured, and the method comprises the following steps:
According to the data, arranging the plants which survive after the flood storage area is in the river basin and generates large water, and establishing a plant selection front list table; and screening plants which meet the functional requirements of the wetland and have the purification capability and water flooding resistance from the front list table, and carrying out plant configuration.
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