Indicator System Construction of Water Environment Pressure Zoning Based on Ecosystem
To scientific and rational complete water environment pressure zoning,it is the key and foundation to build the indicator system of water environment pressure zoning.Considering systemic and interconnectedness of water environment pressure involving,it is necessary to select indicator of water environment pressure zoning from ecosystem perspective.As the interconnectedness of water environment pressure involving and overlap of information in the characterization indicators,in order to avoid repeated expression of information,reduce unnecessary workload and avoid interference caused by redundant indicators,indicators were filtered and main representative indicators were selected.Accordingly principles of indicators selecting and a route of zoning indicator system were developed,zoning indicator system framework was established by frequency statistics,theoretical analysis,correlation analysis and variability analysis method.The indicator selection of water environment pressure zoning for Luohe,Pingdingshan was completed,with indicators of population density,water resource per unit area and industrial structure as zoning indicators,which reflect better natural and man-made elements of water environment pressure.