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

doi:10.13249/j.cnki.sgs.2005.04.484

Abstract

Abstract: 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.

CLC Number:

TP311.132/X24

DI Bao-Feng, YANG Zhong, AI Nan-Shan, ZHANG Jian-Ping. Evaluation on Degraded Ecosystem in Jinshajiang Xerothermic Valley Using RS and GIS—A Case Study of Yuanmou County in Yunnan[J].SCIENTIA GEOGRAPHICA SINICA, 2005, 25(4): 484-489.

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

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