Environmental flow definition method based on river-dominated ecological environment function zoning in strong interference area

Abstract

The invention relates to a method for defining an environmental flow rate of a highly disturbed area based on a river dominant ecological environment functional zone. The method resolves the scientific definition of the environmental flow rate of a highly disturbed area and promotes the recovery of a river ecosystem. The method comprises acquiring required ecological environment data; selecting azone indicator oriented to a zoning purpose; using a top-to-bottom classification method for zoning, and performing flow direction, conflux cumulant and riverway extraction according to a drainage basin depression-free DEM, and determining child drainage basin units by using an intersection of a first-class branch and a main stream and three sections of the main stream as child drainage basin outlets; according to the water ecological environment functional zone and in combination with the requirements of functional properties of different river sections and the dam gate distribution data andpollution load discharge amount in highly disturbed area, determining the flow rate required to maintain self-purification and the flow rate required to maintain aquatic organism inhabitance of a river. The method is beneficial to the scientific definition of the environmental flow rate in the highly disturbed area, ensures the flow rate of the river environment and promotes the virtuous circle development of the river.

Description

technical field [0001] The invention relates to environmental protection, in particular to a method for defining environmental flow in areas with strong interference based on river-dominated ecological environment function zoning. Background technique [0002] The satisfaction of environmental flow is the foundation of the virtuous circle of natural ecosystems of rivers and lakes and the sustainable development of economy and society. With the development of society and economy, unconventional water sources have become an important source of river recharge for urban agglomerations where natural runoff is scarce. However, rivers lack enough flow to ensure a certain level of self-purification ability, and the normal ecological environment function of rivers is difficult to perform. At the same time, due to the needs of human society, the intensive water conservancy projects such as gates and dams have strongly affected the natural circulation process of rivers, resulting in th...

AI Technical Summary

Problems solved by technology

[0005] In view of the above situation, in order to overcome the defects of the prior art, the object of the present invention is to provide a method for defining the environmental flow in the area of ​​strong interference based on the functional zoning of the dominant ecological environment of the river, which can effectively solve the scientific definition of the environmental flow in the area of ​​high artificial interference. Promote the restoration of river ecosystems