地理科学进展 ›› 2010, Vol. 29 ›› Issue (9): 1095-1099.doi: 10.11820/dlkxjz.2010.09.011

• 生态环境 • 上一篇    下一篇

基于PSR模型的三峡库区重庆段生态安全动态评价

魏兴萍1,2   

  1. 1. 西南大学地理科学学院|重庆400715;
    2. 重庆师范大学地理科学学院|重庆400047
  • 收稿日期:2009-09-01 修回日期:2010-01-01 出版日期:2010-09-25 发布日期:2010-09-25
  • 作者简介:魏兴萍(1975-)|女|博士|讲师主要研究方向为资源环境与地理信息系统.E-mail: xingpingwei@126.com.
  • 基金资助:

    重庆市科委项目(CSTC2007BC7001; CSTC2009BA0002);国家科技支撑计划课题项目(2006BAC01A16);国家自然科 学基金(X40801077);教育部重点项目(209100);重庆市自然科学基金(CSTC2008BB7367);科技部国际合作项目 (2008 GR1256);重庆市教委人文丰f科项目(10SKE15);西I菊大学研究生创新基金项目(kb2009004)

Ecological Safety Evaluation of Three Gorges Reservoir Area in Chongqing with the Pressure-State-Response Model

WEI Xingping1,2   

  1. 1. School of Geographic Science, Southwest University, Chongqing 400715,China;
    2. School of Geographic Science,Chongqing Normal University, Chongqing 400047, China
  • Received:2009-09-01 Revised:2010-01-01 Online:2010-09-25 Published:2010-09-25

摘要:

基于压力—状态—响应(PSR)概念模型,从20个指标通过数据标准化处理、指标权重确定和生态安全评价模型的构建,以三峡库区重庆段为例,分析三峡库区重庆段自直辖以来的生态安全问题。运用嫡权和AHP的平均值作为权重,结合主观和客观赋权的优点,使评价更为合理。结果表明,三峡库区重庆段1997-2003年生态安全度为很不安全状况,2004-2007年生态安全度为不安全状况。从资源环境压力来看,1997-2007年其ESI一直处于很不安全状况;从资源环境状态来看,1997-1999年为很不安全状态,2000年和2001年为不安全状态,2002-2006年为临界安全状态,2007年为较安全状态;从人文环境响应来看,1997-2004年为很不安全状况,2005-2007年为不安全状况。从压力—状态—响应模型3方面分析对三峡库区重庆段生态安全的影响,据权重值得知,人文环境响应对城市生态影响最大,其次是资源环境状态,影响最小的是资源环境压力。

关键词: PSR模型, 三峡库区重庆段, 生态安全

Abstract:

An ecological safety index (ESI) system including 20 indices for the Three Gorges Reservoir area in Chongqing was built up following the principles of the pressure-state-sponse (P-S-R) model. The ecological safety problems were analysed through standardizing the primary data, estimating values of weight and construtting models for ecological safety evaluation. The study results was made more reasonable by using the average means of the results from the entropy method and AHP method as comprehensive weight values. The Recults showed that the Three Gorges Reservoir area in Chongqing was kept at a very unsafe state from 1997 to 2003 and kept at an unsafe state from 2004 to 2007. The resource environment was at very unsafe state from 1997 to 1999, unsafe state in both 2000 and 2001, critioal safe state from 2002 to 2006 and relative safe state in 2007. The human enviroment response was at very unsafe state from 1997 to 2004 and unsafe state from 2005 to 2007. The affeoting degrees on urban eoologioal safety of the factors in the PSR model follow a desoending order of human enviromental response, resource environmental state and resource environmental pressure m turns.

Key words: ecological safety, pressu—state—sponse (PSR) model, Three Gorges reservoir region in Chongqing