Water pollution is the main cause of global ecological degradation and seriously affects people’s water supply. In order to respond environmental protection policy provide management departments with a basis for refining quality, this paper uses Gini coefficient (EGC) method based on four indicators, such as capacity, population, land area, gross domestic production (GDP), represent social, eco...

This paper introduces the Tog coefficient, which can be used to measure the level of inequality in a cross-tabulation of two ordinal-level variables. The Gini coefficient is a standard measure of income inequality which has been adapted by other authors for use in different contexts such as the measurement of health inequalities and the quantification of occupational segregation; the Tog coeffi...