摘要
本文通过建立基于面积和权重的石漠化综合评价指数,定量研究了贵州省盘县不同行政单元、不同石漠化分区、不同坡度范围内和不同地貌类型的石漠化严重程度。研究结果发现,石漠化综合指数与石漠化评价单元的划分存在一定关系。以行政区域为单元评价区域石漠化严重程度时,要注意区分该区域碳酸盐岩分布区的石漠化严重程度和该区域整个幅员面积上的石漠化严重程度。而根据石漠化的集中分布程度和自然条件的相似性,以石漠化分区划分、地貌类型和坡度范围作为评价单元,可以克服这一不确定性。
In this study, Panxian County of Guizhou Province is exemplified to establish an integrated assessment index of karst rocky desertification based on the percentage of area and weights of types of rocky desertification. Quantitative research on regional rocky desertification degree of different administration units, different rocky subareas, different gradient ranges and landforms indicated that the integrated assessment index is influenced by assessment unit. If an administration region is selected as the assessment unit, the rocky dcsertification degree of carbonate rock area and that of the total area of this region must be discriminated, but this uncertainty can be avoided if rocky subareas, gradient ranges and landforms are selected as assessment units according to the mustering patterns of rocky desertification and comparability of natural conditions.
出处
《地球与环境》
CAS
CSCD
北大核心
2009年第3期275-279,共5页
Earth and Environment
基金
国家重点基础研究发展计划项目(2006CB403200)
教育部“新世纪优秀人才支持计划”项目(NCET-05-0819),黔科合J字(2005)2077号
关键词
喀斯特石漠化
评价指数
贵州省盘县
karst rocky desertification
assessment index
Panxian County of Guizhou Province