Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Research on Discharge Permit Allocation in Lushui River based on Environmental GINI Coefficient

Version 1 : Received: 5 May 2023 / Approved: 5 May 2023 / Online: 5 May 2023 (10:14:54 CEST)

A peer-reviewed article of this Preprint also exists.

Obin, N.; Ge, F.; Liu, X. Research on Discharge Permit Allocation in Lushui River Based on Environmental GINI Coefficient. Water 2023, 15, 2156. Obin, N.; Ge, F.; Liu, X. Research on Discharge Permit Allocation in Lushui River Based on Environmental GINI Coefficient. Water 2023, 15, 2156.

Abstract

Water pollution is the main cause of global ecological degradation and seriously affects people's water supply. In order to respond to the water environmental protection policy and provide management departments with a basis for refining water quality, this paper used the environmental Gini coefficient (EGC) method based on four indicators such as water environmental capacity, population, land area, and gross domestic production (GDP) to represent social factors, economic factors, and environmental factors, respectively. After the optimization, for COD, the EGC based on the land area was 0.30, EGC based on population was 0.21, EGC based on environment capacity was 0.02, and the EGC based on GDP was 0.45, and the sum of EGC was 0.962. From this result, we observed that the change in the Gini coefficient of each indicator was not very big. Hence, the most significant change in the Gini coefficient was that of GDP, with a higher rate than other criteria. Then, the COD, AND, and TP discharge allocation model was constructed to obtain the total allocated discharge permit in Lushui Basin. The results found that the total discharge permit allocation of COD, AN, and TP to the Lushui basin were 51483.304 tons/year, 843.119 tons/year, and 340.926 tons/year, respectively. Based on the GIS spatial analysis technology, the distribution of unfair factors that cause pollution inequity was investigated. Finally, the reduction measures were proposed to implement environmental supervision and strengthen water environment management strictly.

Keywords

Discharge permit; Environmental Gini coefficient; multi-indicator; total allocation; contribution coefficient

Subject

Environmental and Earth Sciences, Environmental Science

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