Analysis on Driving Factors of Karst Rock-desertification—— With a Special Reference to Guizhou Province

LAN An-jun; XIONG Kang-ning; AN Yu-lun

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Analysis on Driving Factors of Karst Rock-desertification—— With a Special Reference to Guizhou Province

- Analysis on Driving Factors of Karst Rock-desertification—— With a Special Reference to Guizhou Province
- Bulletin of Soiland Water Conservation Vol. 20, Issue 6, Pages: 19-23(2001)
- 作者机构：
  
  贵州师范大学资源与环境科学系,贵州,贵阳,550001
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- Published：2001
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LAN An-jun, XIONG Kang-ning, AN Yu-lun. Analysis on Driving Factors of Karst Rock-desertification—— With a Special Reference to Guizhou Province[J]. Bulletin of Soiland Water Conservation, 2001, 20(6): 19-23.
DOI：

LAN An-jun, XIONG Kang-ning, AN Yu-lun. Analysis on Driving Factors of Karst Rock-desertification—— With a Special Reference to Guizhou Province[J]. Bulletin of Soiland Water Conservation, 2001, 20(6): 19-23. DOI：

摘要

采用地理信息系统(GIS)与遥感(RS)技术

对贵州省喀斯特石漠化状况进行全面调查

建立了全省1∶10万喀斯特石漠化数据库。利用相关分析和主成分分析法

分析了导致石漠化的影响因子

确立指标体系

指出地表植被覆盖率、喀斯特面积、河网密度、未利用地、耕地面积、平均海拔高程、土地垦殖率、草地和≥25

坡地面积等9个因子是喀斯特石漠化的重要驱动力。建立了喀斯特石漠化动力指数模型

计算出了各因子对石漠化的贡献值

指出石漠化产生的根本原因是不合理的人为活动。所建动力指数模型输出结果与遥感调查有高度的一致性

表明石漠化动力指数能较好地反映该地区石漠化过程

可为石漠化治理提供理论依据。

Abstract

Based on the geographic information system and remote sensing

the spatial distribution of karst rock-desertification is studied

and the 1∶100000 map of rock-desertification is made. The methods of bivariate correlation and principal component are used to pick up the information included in driving factors. The relations between rock-desertification and each factor are discussed

and then the system of influential factors indexes are built. As a result

the percentage of forest cover

area of karst regions

drainage networks density

arable land

area of cultivated land

average altitude

cultivation index

grassland and ≥25° surface slope are proved to be the key factors to the rock-desertification. The rock-desertification dynamic index (I R) is also established and the significant value of each factor is calculated. The most important factor of karst rock-desertification is irrational human activity. Its comparison with the GIS-RS derived data shows that I R can reflect the potential capacity of the rock-desertification and also the dynamic process is studied to reveal the dominant factors in karst regions. All these studies may be of great help for the mitigation of the rock-desertification.

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