[1]LAI Chang-hong,QIN Jia-zuo,ZHANG Wen,et al.Assessment on Sensitivity and Spatial Distributed Characteristics of Karst Rocky Desertification in Sichuan Province[J].Research of Soil and Water Conservation,2013,20(04):99-104.
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Assessment on Sensitivity and Spatial Distributed Characteristics of Karst Rocky Desertification in Sichuan Province
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
20
Number of periods:
2013 04
Page number:
99-104
Column:
Public date:
2013-08-28
- Title:
- Assessment on Sensitivity and Spatial Distributed Characteristics of Karst Rocky Desertification in Sichuan Province
- CLC:
- P931.5
- DOI:
- -
- Abstract:
- Based on evaluation principle of the sensitivity of rocky desertification, karst landform distribution, terrain factors, vegetation coverage, soil type, and these effects on the sensitivity of rocky desertification and its spatial distribution characteristics in study area were analyzed by using GIS technology. Comprehensive assessment of the sensitivity of rocky desertification in the study area was conducted. The results showed that: (1) among all the rocky desertification regions over the karst areas, the largest areas were the moderate sensitive areas making up 32.39% of all study area, which were followed by the low sensitive areas (26.75%), the high sensitive areas and the extreme sensitive areas also occupied a large proportion, the ratios of the two areas were 17.50% and 21.51%,respectively; (2) there were obvious regional variation characteristics in spatial distribution of sensitivity of rocky desertification, the high and extreme sensitive areas were the middle reaches of Jinsha River, the lower reaches of Jinsha River, the large areas of middle and lower reaches of Dadu River, the periphery of south of Sichuan Basin and parallel range-gorge areas in the east of Sichuan Province. The low and moderate sensitive areas were Muli River(the most important branch of the upper reaches of Changjiang River in the mountain area of Southwest Sichuan), Shuiluo River, both banks of Yalong River, Yanyuan Basin and most of karst areas in Sichuan Basin; (3) the severity of rocky desertification in the research areas was basically consistent with its sensitivity distribution in general. The quantitative trait of this research area indicates that rocky desertification was well corresponding to the sensitivity of rocky desertification, but strength characteristics differ in certain areas.
- References:
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