Basin grey water footprint evaluation method and water environment treatment strategy making method

Abstract

The invention provides a basin grey water footprint evaluation method and a water environment treatment strategy making method. The grey water footprint evaluation method comprises the steps: carryingout the evaluation unit division of a to-be-evaluated basin according to the basic data of the basin; accounting and analyzing the positions of various pollution sources and the river pollution loadprocess in each evaluation unit to obtain the load discharge of various pollution sources; establishing a grey water footprint accounting model for the point source and non-point source pollution discharge river-entering loads of each evaluation unit according to different pollution discharge modes and a pollutant migration reduction equation; determining grey water footprint accounting parametersaccording to the upstream and downstream relationship of the drainage basin and the water quality target difference; and according to the grey water footprint accounting parameters and the grey waterfootprint accounting model, calculating the quantity of various grey water footprints of the to-be-evaluated unit. The basin grey water footprint evaluation method provided by the invention effectively represents the water environment influence of hourly space scale pollution load discharge, and supports refined and scientific water environment management application.

Description

technical field [0001] The invention belongs to the field of water environment protection, and in particular relates to a gray water footprint evaluation method in a river basin and a water environment treatment strategy formulation method. Background technique [0002] Gray Water Footprint (GWF, Gray Water Footprint) is an indicator related to water pollution, which represents the environmental impact of the economic and social sewage discharge process on rivers, lakes and other water bodies. The gray water footprint is generally defined as the volume of freshwater required to dilute a certain pollution load to a level higher than a certain environmental water quality standard based on the natural background concentration and the existing water environmental quality standard. Therefore, gray water footprint assessment quantifies the impact of pollution load discharge on water bodies into water volume, which can quantitatively evaluate the consumption of natural water pollut...

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Problems solved by technology

[0004] Therefore, the present invention provides a method for assessing the gray water footprint of a river basin and a method for formulating water environment governance strategies, which overcomes the failure of measuring the gray water footprint and the discharge of different types of pollution sources in the prior art from the perspective of the river basin system and the spatial difference of water quality control targets. The defect of insufficient consideration of the mechanism of water pollution process under the condition

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