Discussion of Provincial Environmental Function Zoning Methodology

After analyzing how to use the National Technical Guideline for Environmental Function Zoning(trial) at provincial level, we made technical suggestions to improve comprehensive evaluation and regionalization of environmental functions at provincial level. On the case study of Sichuan Province, we established a comprehensive index system, which consisted of 4 primary indexes, 10 secondary indexes and 31 tertiary indexes. The system is based on GIS grids instead of administrative units. It would help to make quantitative evaluation that highlights the environmental features of function zones and focuses on the practical results of environmental function zoning.