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基于GIS的渭河下游河流沿线区域生态风险评价
引用本文:李谢辉,王磊,李景宜.基于GIS的渭河下游河流沿线区域生态风险评价[J].生态学报,2009,29(10):5523-5534.
作者姓名:李谢辉  王磊  李景宜
作者单位:1. 河南大学黄河文明与可持续发展研究中心,开封,475001;兰州大学西部环境教育部重点实验室,兰州,730000
2. 成都信息工程学院高原大气与环境四川省重点实验室,成都,610225
3. 兰州大学西部环境教育部重点实验室,兰州,730000;陕西省灾害监测与机理模拟重点实验室,宝鸡,721013
基金项目:国家教育部人文社会科学重点研究基地重点资助项目,陕西省重点实验室基金资助项目 
摘    要:以渭河下游河流沿线区域为研究区,基于风险度量的基本原理和区域生态风险评价的流程框图,构建了综合生态风险值的计算模型,即综合生态风险值是综合风险概率、综合生态损失度和综合社会经济易损度的叠加.在研究区历史资料考证和2002年ETM+遥感影像景观分类的基础上,通过选取干旱、洪水、污染和水土流失,利用地理信息系统和现代地理学中的大量数学方法,按照评价步骤和计算模型,将研究区4种生态风险源综合评价结果划分为低风险区,较低风险区,中等风险区,较高风险区和高风险区5个级别.研究结果为环境管理和生态风险决策提供数量化的理论依据和数据支持.

关 键 词:地理信息系统  综合生态风险值  区域生态风险评价  渭河下游
收稿时间:2008/11/5 0:00:00
修稿时间:2009/1/21 0:00:00

Regional ecological risk assessment in catchment area along the Weihe River based on GIS
lixiehui.Regional ecological risk assessment in catchment area along the Weihe River based on GIS[J].Acta Ecologica Sinica,2009,29(10):5523-5534.
Authors:lixiehui
Affiliation:Research Center of Yellow River Civilization and Sustainable Development, Henan University
Abstract:Taking the catchment area along the Weihe River in Shaanxi Province as a study area, and on the basis of elementary principles of risk and the theoretical framework on regional ecological risk assessment, calculative model was established to obtain integrated ecological risk value which was computed by the integrated risk probability, integrated eco-damage, and integrated socio-economic vulnerability. Based on the historical data in study area and landscape classified image of ETM+ in 2002, by selecting four risk sources of drought, flood, pollution and soil erosion, using GIS and a variety of mathematical models and methods, according to assessed steps and calculative model, this paper divided general risk assessed results mainly into five grades, that is, the lowest risk region, lower risk region, moderate risk region, higher risk region, and the highest risk regions. The results can provide quantitatively theoretic basis and data support for environmental management and ecological risk decision-making, and it has an important reference value.
Keywords:GIS  integrated value of ecological risk  regional ecological risk assessment  lower reaches of the Weihe River
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