基于RSEI的生态质量动态变化分析——以丹江流域(河南段)为例  

Dynamic change analysis of ecological quality based on RSEI:A case study of the Danjiang River Basin( Henan section)

作　　者：王勇[1] 王世东[1] WANG Yong;WANG Shidong(School of Surveying and Land Information Engineering,Henan Polytechnic University,454000,Jiaozuo,Henan,China)

机构地区：[1]河南理工大学测绘与国土信息工程学院

出　　处：《中国水土保持科学》2019年第3期57-65,共9页Science of Soil and Water Conservation

基　　金：国家自然科学基金“生态约束条件下的区域土地利用结构与空间格局优化研究”(41301617);河南省科技攻关项目“丹江流域(河南段)土地生态质量评价及其演变机理与对策研究”(192102310038);河南省高等学校重点科研项目“基于定量遥感的集体建设用地复垦质量评价关键技术研究”(17A420001);河南省高校科技创新团队支持计划“煤矿区土地整治与生态修复”(18IRTSTHN008);河南省高校基本科研业务费专项资金“焦作北部山前地带生态安全评判与治理调控研究”(NSFRF1630);河南理工大学创新性科研团队“矿区土地整治与生态修复”(T2017-4)

摘　　要：丹江流域(河南段)作为南水北调中线工程的水源地,其生态质量的好坏与变化情况对水源地的生态保护具有重要的参考依据。为研究南水北调中线工程实施前后丹江流域(河南段)的生态质量的变化情况,以1998、2008和2017年Landsat系列遥感影像为基础,通过主成分分析构建遥感生态指数(RSEI)对丹江流域(河南段)近20年内的生态质量进行动态监测,并结合已有数据对其变化原因进行分析。研究结果表明:1998年到2017年,丹江流域(河南段)的生态质量得到明显改善,其遥感生态指数的均值由1998年的0. 632 0上升至2008年的0. 636 6,到2017年已达到0. 694 4;从空间分布上看,生态质量变差区域主要集中于北部林地和中部的城市区域,变好的区域则集中于东南部以及中部的耕地;研究区的生态质量状况与植被覆盖度的增加和建设用地的扩张关系密切。利用遥感生态指数得到的研究区生态质量可以为研究区的生态保护和水土保持研究提供合理的参考依据。[Backgroud]Danjiang River Basin( Henan section) is the water source of the Middle Route Project of South-to-North Water Diversion Project,its ecological quality is the important reference for the protection of water sources. The implementation of the Middle Route Project of the South-to-North Water Diversion Project has impact on the Dan River Basin( Henan section),so we should study the changes in ecological quality of water source after the implementation of the project. [Methods]This paper chooses the Landsat series of remote sensing images of 1998,2008,and 2017 as the data source and extracts four indicators information which include the greenness,the humidity,the heat,and the dryness. Then combines these indicators with the principal component analysis method to integrate four indicators information,using the PC1 to construct the remote sensing ecological index( RSEI),and dynamically monitoring the ecological quality and its changes in the Danjiang River Basin( Henan section) in the past20 years,and combining the existing data to analysis the change reasons. [Results] The study results shows that from 1998 to 2017,the ecological quality of the Danjiang River Basin( Henan section) was significantly improved,and the average value of RSEI increases from 0. 632 0 in 1998 to 0. 636 6 in2008,and the value reaches 0. 699 4 in 2017;From the perspective of spatial distribution,the areas with better ecological quality are located in the mountainous areas where in the western and northern parts of the study area,while the poorer areas are mostly located in the population gathering areas and parts of the cultivated areas. These three groups RSEI data are used to calculate the difference and generate the change monitoring maps. After analyzing the relationship between the changes in the regions and land use conditions,it was found that the regions where ecological quality deteriorated were mainly concentrated in the northern woodland and central urban areas,and the better areas are concentrated in the arable lands in the

关 键 词：遥感生态指数 生态质量 主成分分析 丹江流域 

分 类 号：X826[环境科学与工程—环境工程] X87