Evaluation of Ecological Vulnerability of Yulin City under the Background of Returning Farmland to Forests

Abstract

Yulin City Located in the Shaanxi Province Maowusu Desert and the northern Shaanxi Loess Plateau transition zone, its special geographical location makes the region a typical ecologically fragile area. Based on the “pressure - state - response" model, this paper based on the 14 indicators of soil erosion, population density, NDVI and so on. Based on the natural and human factors, the principal component analysis method was used in GIS and SPSS software. And the ecological vulnerability of the region for 10 consecutive years from 2003 to 2013 was evaluated with a pixel size of 100 m*100 m. The results show that the ecological fragility in the northern part of Yulin City is higher than that in the southern region and the ecological environment has improved in the past ten years. This paper discusses the relationship between ecological vulnerability and human activities, social development and natural environment, and provides reference and basis for ecological maintenance of Yulin city.