Ecological Security Assessment of Beijing Based on PSR Model

摘要

This paper constructs Beijing's ecological security assessment index system based on pressure-state-response model, using composite index method to evaluate Beijing's ecological security condition, and has obtained good results. It can be seen from the result that Beijing's ecological security's composite index reduced from 0.589 in 2004 to 0.540 in 2008, which is in basal security condition and the comparative security condition. Although the reduced scope is not very big, but it also indicates the condition that Beijing's ecological security is being in a slow downtrend, the main reason is the fast-developing economy has caused the population pressure, the land pressure, the resources and environment pressure of the city enlarge seriously, so that we should enhance Beijing's ecological security awareness. From the result we also could see that the security index of social and cultural responds of Beijing has obviously advanced in the last five years, which explained that people has obviously realized the importance of the city ecological security.