Study on Spatial and Temporal Changes of Ecological Vulnerability in Weinan Area Based on GIS

Abstract

With the development of urbanization, the ecological environment of the typical agro-development city-Weinan is disturbed to varying degrees, and it restricts the coordinated development of resources, population and environment in the region. This paper combines social, economic and climate data to propose an index system suitable for the evaluation of ecological vulnerability in Weinan. The analytic hierarchy process was used to quantitatively evaluate the ecological vulnerability of the Weinan region. The results showed that from 2000 to 2011, the urban ecological vulnerability index(EVI) was higher than that of the surrounding counties, which had a great relationship with the impact of urbanization on ecological vulnerability. The extremely fragile areas of ecological vulnerability in Weinan were mainly distributed in the urban areas of Linwei District and Hancheng. The main reason was that these cities had a fast development speed and a strong industrial base, which had a great impact on the ecological vulnerability.