遼河流域一级分区研究(2011-2-20).docVIP

辽河流域水生态功能一级分区研究 李法云1*、张博1、、王艳杰1、刘素平1（1辽宁大学环境学院，沈阳 110036; 2辽宁省水环境生物监测与水生态安全重点实验室，沈阳 110036；） 依据国内外水环境生态分区的经验，水文地质NDVI指数作为辽河流域一级水生态功能分区的主要因子，并建立一级水生态功能分区指标体系与分区技术方法。结果表明，辽河流域可分为4个一级水生态功能区，主要包括西辽河上游少水型水生态区、西辽河中下游缺水型水生态区、辽河平原少水型水生态区、辽河浑太上游丰水型水生态区、且基于历史数据与野外水生态调查的鱼类聚类分析结果能较好地验证辽河流域一级水生态功能分区结果。研究结果为辽河流域实行水生态管理及为全国水生态功能分区技术方法的制订提供了重要的科学依据与技术支撑。 关键字：辽河流域；水生态功能分区；分区指标；CCA分析；聚类分析 中图分类号：X171.1 The first level aquatic eco-functional region zoning of Liao River basin LI Fa-yun1，2, ZHANG Bo1，2, , WANG Yan-jie1，2,LIU Su-ping1，2 HOU Wei1,2 (1School of Environmental Science, Liaoning University, Shenyang 110036; 2 Liaoning Key Laboratory of Biological Monitering for Water Environment and Water Eco-security, Shenyang 110036; Abstract: Aquatic ecological function regions at watershed scale can offer an important foundation for the transformation of water environmental management from the water quality object to aquatic ecosystemic one. In order to reflect differentiation of the natural characer of Liaohe River Basin on a large scale, this work make use of Canonical Correlation Analysis (CAA) to analyze the correlation between the ratio of Ratio of Mean Annual Precipitation and Annual Mean Temperature, hydrogeologic and water environmental factors, aquatic organisms. At last, runoff depth, hydrogeology, Normalized Difference Vegetation Index (NDVI), Digital Elevation Model (DEM) are selected as the main factors of first aquatic ecological function regions in the Liaohe River Basin. The major content and criteria using in classification are identified and characteristics indicators for different ecoregion have been proposed. Thus indicator system and methodology of delineation of watershed has been established. Finally Liaohe River basin is divided into 4 Grade I regions, they are verified by historical data and the result of fish cluster analysis. The result offers technology support and scientific basis for formulating the National Aquatic ecological function regions at watershed sca