A Typical Case Study on Evolution of Karst Rocky Desertification in Houzhaihe, Puding County, Central Guizhou Province, China
详细信息
- 责任者：Li Yangbing (School of Geography and Environmental Sciences ; Guizhou Normal University ; Guiyang 550001 ; China) ; Luo Guangjie
- 刊名：Geographical Research
- 出版年：2013
- 卷期：32(5)
- 关键词：石漠化 ; rock desertification ; 贵州 ; Guizhou Province
- 页码：p.828-838
- 图表：illus., 5 tables, 23 refs.
- 分类号：1800
- issnNo：ISSN1000-0585
- isbnNo：CN11-1848/P
摘要
In this paper,the evolution of karst rocky desertification (KRD) and influencing factors were studied based on high-precision images in 1963,1978,2005 and 2010,taking Houzhaihe area located on the central plateau of Guizhou Province as a study area.The results show that: in the study area,the comprehensive index of KRD was 1.504 2,1.331 1,1.217 6 and 1.237 6 in 1963,1978,2005 and 2010 respectively,indicating that the land degradation of the study area is generally recovering.However,the area of unchanged KRD from 1963 to 2010 accounted for 43.76% of the total in 2010.The KRD with the slopes of 15°～25° and ＞25° was basically unchanged.Furthermore,within the area of distance ＞900 m away from the rural settlements,the percentage of severe KRD declined from 28.6% to 10.6% over the period 1963～2010.The KRD is mainly distributed in 10 village-level units of different types of KRD in the central part of the study area,indicating that commonly steep slope land was seriously desertified,and the existence of steep slope cropland is still one of the driving factors of land rocky desertification.
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