Lake and reservoir water environment capacity refined regulation and control method based on water functional area water quality target

Abstract

The invention discloses a lake and reservoir water environment capacity fine regulation and control method based on a water functional area water quality target, and the method comprises the steps: establishing a lake large water body hydrodynamic force and water quality mathematic model through collecting basic data, and the basic data comprises lake underwater topographic data and meteorological, hydrological and water quality monitoring data; obtaining a water quality-pollution source response coefficient, a pollution responsibility rate and a total allowable pollution amount of the riversentering the lakes and reservoirs in the estuary pollution diffusion area of each river entering the lakes and reservoirs in sequence, and finally obtaining the pollution reduction amount and reduction rate of key areas. The method overcomes the defect that in a traditional method, the lake and reservoir water environment capacity is calculated according to the water quality change of a certain point in a lake area. Under the influence of hydrodynamic force of the water body, the migration, transformation and degradation processes of pollutants at different lake entry points in space in the large water body are fully considered, and pollutant discharge limiting control and regulation work of lake entry rivers can be conveniently carried out on key polluted areas.

Description

technical field [0001] The method relates to the field of water conservancy engineering, in particular to the field of water environment control, and is specifically a fine control method for the water environment capacity of lakes and reservoirs based on the water quality objectives of water function zones. Background technique [0002] Lakes and reservoirs not only play an important role in regional climate regulation and hydrological cycle, but also have multiple functions such as flood control, power generation, shipping, drinking water source, industrial and agricultural water, and landscape entertainment, which are closely related to human's daily life. With the gradual improvement of material life, people put forward higher requirements for the surrounding living environment, and the improvement of the water environment of lakes and reservoirs is the most important content. However, with the acceleration of urbanization, the rapid growth of population, and the high re...

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Problems solved by technology

[0006] This method is a fine-grained control method for the water environment capacity of lakes and reservoirs based on the water quality objectives of water function zones. This method aims at the problems existing in the calculation methods of the existing water environment capacity of lakes and reservoirs, and proposes to calculate the total amount of pollutants entering the lake. Set the water quality state in the estuary pollution degradation area of ​​the pollution source (river entering the lake) instead of a certain point (section) in the traditional lake area, which can overcome the neglect of the hydrodynamic influence of the large water body of the lake in the traditional method, and cannot target the key areas of the lake and reservoir Problems in the management and control of pollution discharge into the lake due to changes in water quality

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