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Method for calculating estuary ecological water demand based on ecological environment simulation

A technology of ecological water demand and calculation method, which is applied in calculation, water conservancy engineering, open-air water source survey, etc., can solve the problems that are difficult to be widely used and lack, and achieve the effect of strong pertinence and strong practicability

Inactive Publication Date: 2010-02-10
BEIJING NORMAL UNIVERSITY
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Problems solved by technology

Due to the lack of field monitoring data in estuaries, it is difficult to widely apply the calculation method of ecological water demand in estuaries

Method used

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  • Method for calculating estuary ecological water demand based on ecological environment simulation
  • Method for calculating estuary ecological water demand based on ecological environment simulation
  • Method for calculating estuary ecological water demand based on ecological environment simulation

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[0032] Oysters and crabs, typical benthic organisms in estuaries, were selected as key species, and the salinity requirements of oyster breeding season (May to June) and crab breeding season from October to November were taken as the ecological goals of ecological water demand (Table 1).

[0033] Table 1 Salinity targets for key areas in the critical period of the estuary

[0034]

[0035] The temporal change of the ecological water demand target is expressed by the monthly runoff ratio to the natural runoff. The time change target of ecological water demand in typical estuary is as attached figure 1 shown. According to the construction of the estuary runoff input response model, the relationship between the water salinity of different habitats and the runoff freshwater inflow was obtained through simulation analysis, and then according to the salinity targets of different grades of biological habitats shown in Table 1, the ideal, suitable and minimum grades of estuary hab...

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Abstract

The invention provides a method for calculating estuary ecological water demand based on ecological environment simulation, aiming at the problems that estuary ecological water demand calculation method requires large amount of data and the calculation method is difficult to be widely applied. The method has the following steps of determining an estuary ecological water demand target according tothe index requirement of estuary biological indicator to salinity of key biological habitat; establishing a spatial and temporal distribution model of the estuary water body salinity under combined action of runoff and tidal current; modeling the corresponding relationship of habit salinity to runoff input change; and determining the estuary ecological water demand amount based on estuary ecological environment simulation and the ecological water demand target. In the invention, influence on spatial and temporal distribution of the estuary biological habit saline can be realized by simulatingrunoff and tidal current, while key technology support for estuary biological water demand guarantee and ecological restoration can be provided by quantitatively calculating estuary ecological water demand according to limited field monitoring data.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a calculation method for estuary ecological water demand based on habitat simulation, which solves the problem that the current estuary ecological water demand calculation method is difficult to be widely applied. Background technique [0002] Due to the interaction between sea and land, the estuary ecosystem has unique environmental characteristics such as the mixing of fresh water and nutrient enrichment, as well as the ecological service functions of flood regulation and biodiversity maintenance, and has become an important habitat for aquatic organisms to spawn and fatten. . At the same time, while the runoff continues to flow into the ocean through the estuary, the problems faced by the basin ecosystem such as irrational use of water resources and water pollution are concentrated in the estuary ecosystem. A large number of estuarine ecosystems a...

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Application Information

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IPC IPC(8): G06F19/00G01C13/00E02B1/00
Inventor 杨志峰孙涛赵芮
Owner BEIJING NORMAL UNIVERSITY
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