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Position: Home > Articles > A preliminary evaluation of land degradation in dolomite area of Guiyang Journal of Mountain Agriculture and Biology 2007,26 (5) 386-391

贵阳市喀斯特白云岩区土地退化初步评价

作  者:
王德炉;梅再美
单  位:
贵州师范大学地理与生物科学学院;贵州大学林学院
关键词:
白云岩;土地退化;灰色系统;灰色关联度;贵阳
摘  要:
通过大量典型样地调查数据,采用主成分分析法筛选出5个评价指标,用灰色关联基本理论建立退化指数模型,对贵阳市白云岩区土地退化进行初步评价,按照退化指数值将其土地退化程度分为4个等级,分别是轻度(0~0.20)、中度(0.20~0.40)、强度(0.40~0.65)和极强度(≥0.65);59个评价单元有12个属于中度等级,47个属于强度等级,无轻度和极强度等级出现。评价显示,土地退化程度与地表植被有较好的相关性,贵阳市6个区(县)退化程度一致,具有典型的水蚀淋溶型侵蚀特征。
译  名:
A preliminary evaluation of land degradation in dolomite area of Guiyang
作  者:
WANG De-lu1,MEI Zai-mei2(1.College of Forestry,Guizhou University,Guizhou Guiyang 550025,China;2.Department of Geography and Biology,Guizhou Normal University,Guizhou Guiyang 550001,China)
关键词:
dolomite;land degradation;grey system;degree of grey relation;Guiyang
摘  要:
Through a lot of plots data,using principal component analysis to select 5 evaluation index,this paper established a degraded index model based on the grey association analysis and made a preliminary evaluation to the land degradation of dolomite region in Guiyang city.According to the degradation index,4 degrees of land degradation were divided,they were slight(0-0.20),middle(0.20-0.40),strong(0.40-0.65) and strongest(≥0.65),the 59 evaluation units had 12 of middle degree,47 strong,but no slight and strongest degrees.The evaluation results showed that the land degradation had a good correlation with the land vegetation,6 counties in Guiyang city had the same degradation degree and was characterized with a typical water erosion.

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