Eco-economic evaluation of three counties of Ya an City;

Analysis on Land Use Change and Driving Factors in the Mountainous Areas Around Sichuan Province:A Case Study of Ya an City of Sichuan Province;

Preliminary Analysis of Land Assets Operation in Rapid Urbanization in Ya an City;

Construction of Ya an tourism WebGIS and examination of major problems encountered;

Study on the Spatial Distribution of Leisure and Recreation Industry in Ya an City;

The Research on Coupling Development Relationship between Urbanization and Environment in Ya an;

A Research on Assessment of Regional Ecosystem Services Value——With Ya'an City as an Example;

Water resources exploitation and protection in Ya'an City of Sichuan Province

According to the analysis of air pollution factor(including SO_2,NO_x and fall dust)and rainfall in between 2001 and 2003,the result indicates that the acid rain of Yaan urban area belongs to sulfuric acid.

The samples come from farmland,plantation forest,floodplain wetlands and population centers in suburb of Yaan located in southern Sichuan.

Preliminary study on precipitation threshold of precipitation- induced landslides in Ya an Yucheng District, Sichuan Province;