Abstract
Hongshan district is a typical region in Three Parallel Rivers World Natural Heritage site of China. In recent years, human factors lead to series ecological security problems. Ecological safety assessment is an important basis to study regional ecological security situation. Using 2006 and 1990 time image interpretation data, we have built Driving forces- Pressure- State- Impact- Responses (DPSIR) model by GIS and structured ecological safety evaluation index system. Using Spss17 etc software and according to the weight and ecological safety factor calculation evaluated ecological safety in the area, and got the ecological security level space differences. The results show that three towns in the area 1990 to 2006 ecological safety evaluation, Gezan Village ecological security synthetical index reduced from 0.3335 to 0.4550, and the ecological security level dropped from 4 to 5, and in extremely insecurity state; Dongwang Village increased from 0.5252 to 0.5707, level keep 4, belong to quite insecurity state; Jiantang Township increased from 0.6438 to 0.6672, level keep 3, belong to insecurity state. We proposed ecological safety protection suggestions.
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