长江流域资源与环境 >> 2013, Vol. 21 >> Issue (Z): 50-.

• 生态环境 • 上一篇    下一篇

基于PSR框架模型的三峡库区忠县汝溪河流域生态系统健康评价

杨予静| 李昌晓, 丽娜·热玛赞   

  1. (西南大学生命科学学院三峡库区生态环境教育部重点实验室|重庆 400715)
  • 出版日期:2013-09-20

ASSESSMENT OF ECOSYSTEM HEALTH IN THE RUXI RIVER BASIN OF ZHONGXIAN COUNTY IN THE THREE GORGES RESERVOIR AREA BASED ON PRESSURESTATERESPONSE (PSR) MODEL

YANG Yujing| LI Changxiao| REMAZAN·Lina   

  1. (Key Laboratory for the EcoEnvironment of the Three Gorges Reservoir Region of the Ministry of Education,College of Life Sciences,Southwest University,Chongqing 400715,China
  • Online:2013-09-20

摘要:

以压力状态响应(PSR)框架模型作为研究方法,以2005~2009年的数据为基础,参考国内外已有的有关流域生态系统健康的研究,构建三峡库区忠县汝溪河流域生态系统健康评价体系,采用层次分析法(AHP)确定该流域各指标的权重值,运用流域生态系统健康综合指数模型对该流域进行综合健康评价分析。研究表明:5 a间,忠县汝溪河流域生态系统的健康平均综合指数为0509 7,整体上处于较健康的状态。2005~2009年,该流域生态系统健康处于波动状态,其中,2007年的流域生态系统健康状况最佳,但2006年的流域生态系统健康状态较差。研究表明,对三峡库区忠县汝溪河流域生态系统健康影响较大的有生物第一性潜在生产率、人口密度,以及地表水综合污染指数等指标。总体上,2005~2009年忠县汝溪河流域在社会、经济、自然各方面都处于良好的状态,整体上保持着整个生态系统的健康状态,基本上能实现本流域的可持续发展。然而,我们仍需将社会效应、经济效应与生态环境相结合,保持三峡库区忠县汝溪河流域生态系统的健康状态

Abstract:

With the PressureStateResponse (PSR) model developed by the Organization for Economic Cooperation and Development (OECD),this paper assessed the ecosystem health condition from 2005 to 2009 in the Ruxi River basin of Zhongxian County in the Three Gorges Reservoir Area.Based on the researches about watershed ecosystem health assessment in both domestic and foreign countries,an integrative assessment model of ecosystem health in the Ruxi River basin was built.Three layers (object,item and index layers) were set up in the ecosystem health assessment index system.The weights of the nine indicators were estimated by Analytic Hierarchy Process (AHP),and integrative index model of watershed ecosystem health was used to determine the ecosystem health comprehensive index (E).The results showed that the mean value of E from 2005 to 2009 in the Ruxi River basin was 0509 7,showing a state of middle health in these areas overall. During these years, there was a fluctuated trend in terms of the ecosystem health in this basin.In particular,the basin ecosystem was healthy in 2007 when the E value was the highest among the five years,while the ecosystem was morbid in 2006.Moreover,the ecosystem health of Ruxi River basin in the Three Gorges Reservoir Area was greatly influenced by net primary productivity (NPP),population density,and surface water comprehensive pollution index.Basically,from 2005 to 2009,the social,economic and natural environment〖JP2〗 of Ruxi River basin in Zhongxian County was in good condition,and the ecosystem was somewhat healthy and sustainable.However,a combination of ecological effects with social and economic effects on the watershed should be considered to maintain the ecosystem health in Ruxi River basin of Zhongxian County

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