An aquatic ecoregion delineation approach based on GIS and spatial environmental data in Heihe River Basin, Northwestern China
An aquatic ecoregion delineation approach based on GIS and spatial environmental data in Heihe River Basin, Northwestern China
复制标题
DOI：
10.1016/j.quaint.2014.12.015
复制
发表时间：
2015-09
影响因子：
2.2
通讯作者：
Shiyan Wang;D. Cheng;Zhan-po Mao;Chang Liu;Suzhen Yang;Liang Wang;Jiaping Wu;Yan-liang Du
中科院分区：
文献类型：
--
作者：
Shiyan Wang;D. Cheng;Zhan-po Mao;Chang Liu;Suzhen Yang;Liang Wang;Jiaping Wu;Yan-liang Du
中国经济的快速增长给水资源管理者带来了巨大的挑战，因为水资源短缺，水污染严重，生活和工业用水需求不断增长，以及粮食安全的要求。水生生态区越来越多地被用作流域尺度水生生态系统管理的空间单元。本文选取降水量、干旱指数和海拔作为划分一级水生生态区的指标，选取径流深、地形起伏和植被覆盖度作为划分二级水生亚生态区的指标。采用GIS方法结合主成分分析（PCA）和典型对应分析（CCA）进行研究。利用空间栅格叠置技术和空间ISODATA聚类分析方法，将黑河流域划分为3个一级水生生态区和8个二级水生亚生态区。一级和二级水生态区在流域尺度自然地理属性、气候属性、河流理化特征和生态系统属性上的差异表明，水生态区划分是合理的。
Rapid economic growth in China has presented great challenges to its water resource managers due to a scarcity of water resources, severe water pollution, growing domestic and industrial water demands, and requirements for food security. Aquatic ecoregions are increasingly used as spatial units for aquatic ecosystem management at the watershed scale. In this paper, precipitation, drought index and elevation were selected as the regionalizing indicators for the delineation of level I aquatic ecoregions, and runoff depth, relief and vegetation coverage for the level II aquatic subecoregion delineation. A GIS method integrated with principal component analysis (PCA) and canonical correspondence analysis (CCA) was used in this study. The spatial raster overlay technology and spatial ISODATA clustering analysis approach divided the Heihe River Basin into three level I aquatic ecoregions, and eight level II aquatic subecoregions. Differences among level I and level II aquatic ecoregions in landscape-scale natural geographical attributes, climatic attributes, physical and chemical features of the river, and ecosystem attributes suggest that the aquatic ecoregions delineation is reasonable.