川西北某县域土地生态环境质量评价  

Soil Ecological Environment Quality Assessment in a County of Northwestern Sichuan Province

作　　者：刘昌蓉[1] 张礼中[1] 黄爽兵[1] 

机构地区：[1]中国地质科学院水文地质环境地质研究所,石家庄050061

出　　处：《南水北调与水利科技》2013年第5期43-47,共5页South-to-North Water Transfers and Water Science & Technology

基　　金：中国地质科学院水文地质环境地质研究所基本科研业务费(SK201305);国土资源大调查项目"全国主要城市环境地质综合评价"(1212010535501);中国地质调查局"城市群地质环境信息平台建设"(1212011220025)

摘　　要：现有的土地评价工作侧重于土地应用功能,而对土地生态环境功能的考虑比较少。为了探索考虑生态环境功能的土地质量评价方法,选择生态环境条件脆弱的泸定县为研究区,在土地利用类型的基础上,加入坡度、坡向、高程等地形要素指标,建立土地生态环境质量评价指标体系,并应用GIS、RS和层次分析(AHP)技术获取评价因子专题图,经过图形叠置生成泸定县土地生态环境质量等级图。评价结果显示,影响研究区土地生态环境质量的主要因素为坡度、降水量、高程、植被指数和土壤质地等。经过对泸定县土地生态环境质量评价等级与地貌类型、土地利用方式及生态环境因素进行对比分析,认为评价结果与现实条件吻合较好。The current soil assessment method focuses on the application function of soil, while the ecological environment func- tion is not largely considered. In order to examine the soil quality assessment method in consideration of ecological environment function, an ecological environment quality assessment index system was developed to evaluate the soil quality of Luding Coun- ty, a typically vulnerable district of ecological environment. The system was based on land use and incorporated the topographic factors such as slope, aspect, and elevation. GIS, RS, and Analytic Hierarchy Process （AHP） technique were employed to obtain the thematic maps of evaluation indexes, which were overlaid to generate the soil ecological environment quality map of Luding County. The results indicated the main factors affecting the soil ecological environment quality in the study area include the slope, precipitation, elevation, vegetation index, and soil texture. The soil ecological environment quality assessment results were compared with the topography, land use, and ecological environment factors, which suggested that the assessment results are in accordance with the actual conditions.

关 键 词：土地生态环境质量 GIS RS 泸定县 图形叠置 层次分析法 

分 类 号：F301.2[经济管理—产业经济]