基于RS与GIS的金沙江干热河谷区退化生态系统评价——以云南省元谋县为例  

Evaluation on Degraded Ecosystem in Jinshajiang Xerothermic Valley Using RS and GIS—A Case Study of Yuanmou County in Yunnan

作　　者：第宝锋[1] 杨忠[1] 艾南山[2] 张建平[3] 

机构地区：[1]中国科学院水利部成都山地灾害与环境研究所 [2]四川大学建筑与环境学院,四川成都610065 [3]西藏自治区国土资源厅,西藏拉萨850000

出　　处：《地理科学》2005年第4期484-489,共6页Scientia Geographica Sinica

基　　金：国家"十.五"科技攻关项目(2001BA606A-07)部分成果

摘　　要：文章以元谋县为例,研究干热河谷退化生态系统评价。在对植被指数、斑块分维数、沟谷密度、坡度、水热分带、载畜量、人口密度等因子分析的基础上,通过建立遥感和地理信息数据库进行综合定量评价。评价结果表明,元谋干热河谷生态环境退化较严重,就地形垂直分带而言,坝周低丘陵区生态环境退化最严重;就不同土地景观类型而言,旱地、林地、草地生态系统退化较严重。文章还对元谋干热河谷生态系统退化主要原因、空间分布规律及其恢复重建途径进行研究与探索。Taking Yuanmou County of Yunnan Province as the case, an evaluation on the degraded ecosystem is carried out in Jinshajiang Xerothermic Valley. Based on seven appraisal factors-vegetation index, average patch dimensionality, density of gullies, slop, water-heat belt, livestock carrying and population density, this thesis carries on a comprehensive quantitative evaluation by creating RS and GIS database. The conclusion indicates that there has been a serious ecological degradation in Yuanmou Xerothermic Valley. Compared with the different vertical distribution, the mountain region around the flatland has the most grievous ecological degradation. On the other hand, the non-irrigated farmland, forestland and grassland degrade more seriously among all types of landscape utilization. On the illustration of degraded ecosystem evaluation, the main reasons of ecosystem degradation and rehabilitation methods of degraded ecosystem have been taken under full consideration in this thesis.

关 键 词：遥感-地理信息系统 干热河谷 退化生态系统 评价 

分 类 号：TP311.132[自动化与计算机技术—计算机软件与理论] X24[自动化与计算机技术—计算机科学与技术]