Acta Geographica Sinica ›› 2005, Vol. 60 ›› Issue (5): 771-778.doi: 10.11821/xb200505008

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Hazardous Assessment of Karst Rocky Desertification in Guizhou Province: An Application of the RBFN Model

HUANG Qiuhao, CAI Yunlong   

  1. Department of Resources, Environment & Geography, Center for Land Study, Peking University, Beijing 100871, China
  • Received:2005-04-06 Revised:2005-05-23 Online:2005-09-25 Published:2010-09-09
  • Supported by:

    Key Project of National Natural Science Foundation of China, No.40335046

Abstract:

Karst rocky desertification in karst areas of Southwest China is an important obstacle for the sustainable development of the locality. Many researchers have paid more attention to this issue. Based on the previous research, this paper selects Guizhou province as the research area, quantifies the various indexes influencing the karst rocky desertification, using the GIS technology to get the spatial data, and builds the RBFN (Radial Basis Function Network) model for hazardous assessment. After training the relevant data of the different counties with karst rocky desertification, we get the parameters of the model, and then evaluate the karst rocky desertification. The result shows that the whole southwestern part of Guizhou province is a high hazardous area to karst rocky desertification, the northern part is moderate and the southeastern part, slight. Comparisons with other researches show that the result is in conformity with actual conditions, proving the reasonability and applicability of the RBFN model.

Key words: karst rocky desertification, RBFN, hazardous assessment, Guizhou Province