CN113919685B - Method for optimizing ecological flow distribution - Google Patents
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- CN113919685B CN113919685B CN202111171783.6A CN202111171783A CN113919685B CN 113919685 B CN113919685 B CN 113919685B CN 202111171783 A CN202111171783 A CN 202111171783A CN 113919685 B CN113919685 B CN 113919685B
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Abstract
The invention discloses a method for optimizing ecological flow distribution, which comprises the following steps: s1, acquiring a basin map of a research basin, and establishing an ecological flow management system model; s2, optimizing the ecological flow management system model to obtain an optimized ecological flow management system model; s3, flow distribution is carried out by adopting an optimized ecological flow management system model, and the flow distribution is completed; the invention solves the problem of unreasonable water resource distribution in the water resource shortage basin.
Description
Technical Field
The invention relates to the technical field of environment and ecological water conservancy, in particular to a method for optimizing ecological flow distribution.
Background
The problems of over-development of water resources in a river basin and water pollution are serious, river channel cutoff and ecological system degradation occur, hydrological conditions of partial river reach are changed fundamentally, ecological functions of rivers are almost completely lost, and the serious shortage of ecological water in the river basin is caused by the shortage of water resources in the river basin and unreasonable development and utilization of the water resources.
The current river basin has the current situations of water engineering height regulation, water resource shortage, serious water pollution, large river flow form change and serious water ecological degradation, how to adjust the water using structure and provide an ecological flow guarantee scheme with a cost-efficiency ratio, and is the key for guaranteeing the communication and ecological restoration of a river green corridor.
Disclosure of Invention
Aiming at the defects in the prior art, the method for optimizing the ecological flow distribution solves the problem of unreasonable water resource distribution in the water resource shortage basin.
In order to achieve the purpose of the invention, the invention adopts the technical scheme that: a method of optimizing ecological traffic distribution, comprising the steps of:
s1, acquiring a basin map of a research basin, and establishing an ecological flow management system model;
s2, optimizing the ecological flow management system model to obtain an optimized ecological flow management system model;
and S3, performing flow distribution by adopting the optimized ecological flow management system model to complete the flow distribution.
Further, the step S1 includes the following sub-steps:
s11, acquiring a watershed map of a research watershed;
s12, abstracting a water source on the watershed map into water source nodes, abstracting a river on the watershed map into a hydraulic connection line, abstracting a water using point into a water taking node, and abstracting a water converging and shunting point into a converging and shunting node;
and S13, judging the upstream and downstream relation of each node according to a DEM elevation map on the drainage basin map, performing node water quantity distribution on various water behaviors, and distributing the flow to a hydraulic connection line to obtain an ecological flow management system model.
Further, the domain map in step S1 includes: the method comprises the steps of DEM high-level diagram, a drainage area vegetation map, a drainage area soil utilization map and a drainage area administrative map.
Further, the step S2 includes the following sub-steps:
s21, giving initial values to all nodes and hydraulic connecting lines on the ecological flow management system model by adopting a group of original flow data, and preliminarily calculating the ecological flow preliminary expected value of each river section;
s22, sequentially judging whether the ecological flow expected value of each river section in each year is smaller than the initial expected value, if so, adjusting the ecological flow expected value of the corresponding node of the river to obtain an optimized ecological flow management system model, and if not, adjusting the ecological flow expected value of the corresponding node of the river to obtain the optimized ecological flow management system model.
Further, the method for adjusting the ecological flow expectation value of the node corresponding to the river in step S22 is as follows:
a1, judging whether the ecological flow satisfaction rate of each node of the river from upstream to downstream is larger than the upper limit satisfaction rate, if so, obtaining an optimized ecological flow management system model without adjustment, ending the substeps, if not, obtaining the nodes needing to be adjusted, and skipping to the step A2;
a2, adjusting the nodes to be adjusted by adopting an approximation adjustment method;
and A3, judging whether the adjusted expected value of the ecological flow of the river section is smaller than the initial expected value, if so, adjusting the expected value of the ecological flow of the river section, searching a next node to be adjusted from the node to be adjusted to the downstream, skipping to the step A2, accordingly obtaining an optimized ecological flow management system model, and finishing the substeps.
Further, the approach adjustment method in step A2 is as follows: and gradually approaching the ecological flow expected value of the node to be regulated to the maximum adjustable value, and stopping regulation when the river section flow value satisfying rate meets the expected requirement or the ecological flow expected value of the node to be regulated reaches the maximum adjustable value in the approaching process, so that the flow data of the node to be regulated is regulated.
In conclusion, the beneficial effects of the invention are as follows:
(1) The method and the system establish an ecological flow management system model by shooting the basin map of the research basin and abstracting all parts in the basin map, thereby facilitating flow distribution and calculation of the nodes.
(2) And when the river cross section flow value meets the expected value, the flow of the output cross section is ensured on the basis of meeting the agricultural or industrial water to the maximum extent, and if the maximum regulating value is approached, the expected output result can not be reached, the regulation of the node is terminated, so that the basic water demand of the agriculture or industry is ensured.
(3) According to the invention, through establishing an ecological flow management system model and setting the limiting conditions of the upper limit satisfaction rate and the expected value, the correct distribution of the flow of each node of each hydraulic connection line is ensured, and the basic water demand of agriculture or industry is ensured.
Drawings
Fig. 1 is a flow chart of a method of optimizing ecological traffic distribution.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
As shown in fig. 1, a method for optimizing ecological traffic distribution includes the following steps:
s1, acquiring a basin map of a research basin, and establishing an ecological flow management system model;
the flow domain graph in step S1 includes: the method comprises the steps of DEM high-level diagram, a drainage area vegetation map, a drainage area soil utilization map and a drainage area administrative map.
Step S1 includes the following substeps:
s11, acquiring a watershed map of a research watershed;
s12, abstracting a water source on the watershed map into water source nodes, abstracting a river on the watershed map into a hydraulic connection line, abstracting a water using point into a water taking node, and abstracting a water converging and shunting point into a converging and shunting node;
and S13, judging the upstream and downstream relation of each node according to a DEM elevation map on the drainage basin map, performing node water quantity distribution on various water behaviors, and distributing the flow to a hydraulic connection line to obtain an ecological flow management system model.
S2, optimizing the ecological flow management system model to obtain an optimized ecological flow management system model;
step S2 includes the following substeps:
s21, giving initial values to all nodes and hydraulic connecting lines on the ecological flow management system model by adopting a group of original flow data, and preliminarily calculating the ecological flow preliminary expected value of each river section;
s22, sequentially judging whether the ecological flow expected value of each river section in each year is smaller than the initial expected value, if so, adjusting the ecological flow expected value of the corresponding node of the river to obtain an optimized ecological flow management system model, and if not, adjusting the ecological flow expected value of the corresponding node of the river to obtain the optimized ecological flow management system model.
The method for adjusting the flow data of the node corresponding to the river in step S22 is:
a1, judging whether the ecological flow satisfaction rate of each node of the river from upstream to downstream is larger than the upper limit satisfaction rate, if so, obtaining an optimized ecological flow management system model without adjustment, ending the substeps, if not, obtaining the nodes needing to be adjusted, and skipping to the step A2;
the upper limit satisfaction rate in the step A1 is the water consumption of industry or agriculture.
A2, adjusting the nodes to be adjusted by adopting an approximation adjustment method;
the approach adjustment method in the step A2 is as follows: and gradually approaching the ecological flow expected value of the node to be regulated to the maximum adjustable value, and stopping regulation when the river section flow value satisfying rate meets the expected requirement or the ecological flow expected value of the node to be regulated reaches the maximum adjustable value in the approaching process, so that the flow data of the node to be regulated is regulated.
When the river cross section flow value meets the expected value, the flow of the output cross section is ensured on the basis of meeting the agricultural or industrial water to the maximum extent, and if the maximum regulating value is approached, the expected output result is still not reached, the regulation of the node is terminated, so that the basic water demand of the agriculture or industry is ensured.
During adjustment, the method comprehensively balances ecological restoration requirements and social economic bearing degree, takes ecological flow guarantee as guidance, analyzes the drainage basin ecological flow guarantee degree and social economic bearing degree with different priorities by utilizing the cost relationship of water supply and water saving benefits obtained by water supply benefit and water saving cost investigation, selects an optimized ecological flow standard according to the principle of social economic and ecological environment coordinated development, and further obtains an optimal approach adjustment method.
And A3, judging whether the adjusted expected value of the ecological flow of the river section is smaller than the initial expected value, if so, adjusting the expected value of the ecological flow of the river section, searching a next node to be adjusted from the node to be adjusted to the downstream, skipping to the step A2, accordingly obtaining an optimized ecological flow management system model, and finishing the substeps.
And S3, performing flow distribution by adopting the optimized ecological flow management system model to complete the flow distribution.
In conclusion, the beneficial effects of the invention are as follows: according to the invention, through establishing an ecological flow management system model and setting the limiting conditions of the upper limit satisfaction rate and the expected value, the correct distribution of the flow of each node of each hydraulic connection line is ensured, and the basic water demand of agriculture or industry is ensured.
Claims (2)
1. A method for optimizing ecological traffic distribution, comprising the steps of:
s1, acquiring a basin map of a research basin, and establishing an ecological flow management system model;
s2, optimizing the ecological flow management system model to obtain an optimized ecological flow management system model;
s3, flow distribution is carried out by adopting an optimized ecological flow management system model, and the flow distribution is completed;
the step S1 comprises the following sub-steps:
s11, acquiring a watershed map of a research watershed;
s12, abstracting a water source on the watershed map into water source nodes, abstracting a river on the watershed map into a hydraulic connection line, abstracting a water using point into a water taking node, and abstracting a water converging and shunting point into a converging and shunting node;
s13, judging the upstream and downstream relation of each node according to a DEM elevation map on the drainage basin map, performing node water quantity distribution on various water behaviors, and distributing the flow to a hydraulic connection line to obtain an ecological flow management system model;
the step S2 comprises the following sub-steps:
s21, giving initial values to all nodes and hydraulic connecting lines on the ecological flow management system model by adopting a group of original flow data, and preliminarily calculating the ecological flow preliminary expected value of each river section;
s22, sequentially judging whether the ecological flow expected value of each river section in each year is smaller than the initial expected value, if so, adjusting the ecological flow expected value of the corresponding node of the river to obtain an optimized ecological flow management system model, and if not, adjusting the ecological flow expected value of the corresponding node of the river to obtain the optimized ecological flow management system model;
the method for adjusting the ecological flow expected value of the node corresponding to the river in the step S22 is as follows:
a1, judging whether the ecological flow satisfaction rate of each node of the river from upstream to downstream is larger than the upper limit satisfaction rate, if so, obtaining an optimized ecological flow management system model without adjustment, ending the substeps, if not, obtaining the nodes needing to be adjusted, and skipping to the step A2;
a2, adjusting the nodes to be adjusted by adopting an approximation adjustment method;
a3, judging whether the adjusted expected value of the ecological flow of the river section is smaller than the initial expected value or not, if so, adjusting the expected value of the ecological flow of the river section, searching a next node to be adjusted from the node to be adjusted to the downstream, jumping to the step A2, accordingly obtaining an optimized ecological flow management system model, and finishing the substeps;
the approximation adjustment method in the step A2 comprises the following steps: and gradually approaching the ecological flow expected value of the node to be regulated to the maximum adjustable value, and stopping regulation when the river section flow value satisfying rate meets the expected requirement or the ecological flow expected value of the node to be regulated reaches the maximum adjustable value in the approaching process, so that the flow data of the node to be regulated is regulated.
2. The method for optimizing ecological traffic distribution according to claim 1, wherein the domain map in step S1 includes: the method comprises the steps of DEM high-level diagram, a drainage area vegetation map, a drainage area soil utilization map and a drainage area administrative map.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102156914A (en) * | 2011-03-30 | 2011-08-17 | 东华大学 | Method for cooperatively and optimally allocating water volume in non-flood season |
| CN109658287A (en) * | 2018-12-27 | 2019-04-19 | 中国水利水电科学研究院 | A kind of basin water dispatching method evenly distributed based on water resource space-time |
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| US20150046227A1 (en) * | 2013-08-12 | 2015-02-12 | Wal-Mart Stores, Inc. | Inventory deployment optimization apparatus and method |
| CN104281780B (en) * | 2014-10-11 | 2016-03-23 | 水利部交通运输部国家能源局南京水利科学研究院 | Linear resesvoir is detained and confluxes and net watershed (many sub basin) method of confluxing |
| CN108108838B (en) * | 2017-12-18 | 2021-08-27 | 华电福新能源股份有限公司福建分公司 | Season regulation reservoir optimal scheduling method with high water utilization rate |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102156914A (en) * | 2011-03-30 | 2011-08-17 | 东华大学 | Method for cooperatively and optimally allocating water volume in non-flood season |
| CN109658287A (en) * | 2018-12-27 | 2019-04-19 | 中国水利水电科学研究院 | A kind of basin water dispatching method evenly distributed based on water resource space-time |
Non-Patent Citations (1)
| Title |
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| 彭文启.流域水生态承载力理论与优化调控模型方法.《中国工程科学》.2013,第15卷(第3期),第33-43页. * |
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