基于基尼系数的中国水生态分区研究  

Establishment of aquatic ecosystem divisions based on the environmental Gini coefficient in China

作　　者：蒋艳[1] 曾肇京[2] 张建永[2] 

机构地区：[1]中国水利水电科学研究院,北京100038 [2]水利部水利水电规划设计总院,北京100011

出　　处：《生态学报》2015年第7期2177-2183,共7页Acta Ecologica Sinica

基　　金：国家自然科学基金(50709033);中国水利水电科学研究院专项(水功能区限制纳污红线制度建设对策与措施)

摘　　要：提出了反映水生态系统空间分布规律和特征差异的水生态分区方案,并与国家现有的水资源分区、生态功能区划、水功能区划等相关区划成果相互衔接,为水资源综合利用、流域生态保护和经济社会发展规划提供实用的自然基础。以我国自然地理特征的空间变异与地域关联为依据,以流域为基本单元,进行水生态区划的初步研究,提出了分区的指标体系、步骤和区划方法,形成了两级的全国水生态分区体系。首先,划分为东部区、中部区、西北区和西南区4个水生态一级区;进行水生态二级区划时选取水资源量、降雨量、人口密度、NDVI作为分区的评价因子,根据洛伦茨曲线和基尼系数对分区合理性进行了检验。验证结果表明,各个水生态二级区的水资源量与降雨量、人口密度和NDVI值之间的基尼系数均不超过0.4,分区方案比较合理,从而形成34个水生态二级区,分布在东部13个,中部10个,西北6个,西南5个。The division scheme discussed in this study is based on the characteristics and spatial distribution of aquatic ecosystems; the scheme takes into account natural geographic features, water resources, hydrological characteristics, ecosystem functions, environmental and socio-economic conditions, and the impact of water conservancy projects on watersheds. It is based on divisions within China based on natural geography, ecological function, water resources, and water functions. This study proposes the establishment of national water eco-region divisions, including an indexing system, specific methods for establishment of divisions, and a sequence of steps for dividing water eco-regions. This study also divided watersheds nationwide into various water eco-regions, which were subsequently evaluated and verified using economic test procedures. The proposed water eco-regions would provide a viable basis for the comprehensive utilization of water resources, ecological protection, and economic and social development, for general planning of nationwide watersheds. There are three landforms extending from west to east in China, together with a dry and wet area stretching from the northwest to the southeast. Water eco-regions take into account existing physical geography, climate, water resources, and ecological conditions, as well as national ecological function zoning and water districts. From the perspective of systems analysis, we propose an indicator system that includes three layers, namely target, feature, and index layers; these provide a reflection of the spatial distribution of regional natural geographical and climatic conditions, water resources, aquatic ecosystems, human activities, the layout of economic and social structures, and ecological differences. The index layer included 11 indices; the key indicators among these for division of water eco-regions are landform, vegetation cover, and depth of annual runoff. A set of secondary indicators was used to adjust and correct the preliminary subdivisions; this in

关 键 词：水生态系统 水生态区划 指标体系 基尼系数 洛伦茨曲线 

分 类 号：TV21[水利工程—水文学及水资源]