Industrial grey water footprint calculation method considering influence of receiving water body environment

Abstract

The invention discloses an industrial grey water footprint calculation method considering the environmental influence of a receiving water body, and belongs to the technical field of water pollution evaluation methods, and the method comprises the following steps: obtaining pollution discharge data of each enterprise in a region, and determining a water functional region corresponding to a pollutant receiving water body; according to the pollutant holding capacity of each water functional area, calculating the total pollutant standard-exceeding emission amount borne by the area; according to the proportion of the pollutant discharge amount, distributing the pollutant standard-exceeding discharge amount of the water functional area to each enterprise; calculating out-of-limit grey water footprints of each enterprise by adopting a critical dilution method; and calculating the industrial standard-exceeding grey water footprint of the region. By quantifying the standard-exceeding grey water footprint of a region, the influence of pollutants discharged in a standard-exceeding manner on fresh water resources is revealed. From the perspective of water function division, the natural condition of the received water body and the total amount control target of the limited pollutant are incorporated into the grey water footprint calculation method system, so that the grey water footprint evaluation of the region is more scientific and reasonable, and the method has certain technical guidance significance for determining the overproof water body and tracing the responsibility of the overproof enterprise.

Description

technical field [0001] The invention belongs to the technical field of water pollution evaluation methods, and in particular relates to a method for calculating industrial gray water footprints considering the environmental impact of receiving water bodies. Background technique [0002] The concept of gray water footprint was proposed by Hoekstra and Chapagain in 2008, which is defined as the amount of fresh water required to dilute a certain pollution load to the maximum concentration allowed by water quality standards. The gray water footprint describes the water quality pollution in units of water volume, which can directly reflect the impact of water pollution on the availability of freshwater resources. The analysis of regional gray water footprint can be carried out from three parts: industry, agriculture and life. At present, the more popular gray water footprint method uses the total amount of pollutant discharge in the region and the unified water quality standard ...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art, provide a kind of industrial gray water footprint calculation method that considers the influence of receiving water body environment, for solving the gray water footprint evaluation in the prior art only considering the impact of pollutant discharge, However, due to the neglect of the differences in the pollutant-holding capacity of different receiving water bodies, gray water footprint evaluation cannot quantify the impact of corporate sewage discharge on the water environment in different regions, and it is difficult to trace the technical problems of specific industries responsible for excessive sewage discharge.

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