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[1]CHEN Hao,WU Pan,LIU Pei,et al.Landscape Patterns of Rocky Desertification in the Mawoshan Karst Basin of Northwest Guizhou Province[J].Research of Soil and Water Conservation,2012,19(04):239-243.

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Landscape Patterns of Rocky Desertification in the Mawoshan Karst Basin of Northwest Guizhou Province

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 19 Number of periods: 2012 04 Page number: 239-243 Column: Public date: 2012-08-20

Title:: Landscape Patterns of Rocky Desertification in the Mawoshan Karst Basin of Northwest Guizhou Province

Author(s):: CHEN Hao, WU Pan, LIU Pei, GU Shang-yi, CAO Zhen-xing; College of Resources and Environmental Engineering, Guizhou University, Guiyang 550003, China

Keywords:: Mawoshan; karst basin; remote sensing; GIS; rocky desertification; erosion modulus

CLC:: P901;X171.4

DOI:: -

Abstract:: As the limit by natural and economic factors and the lack of historical data, remote sensing images collected in different periods were used to reveal the development process of karst rocky desertification landscape in Mawoshan basin of Weining county, Guizhou Province. GIS and statistics analysis methods were used to analyze a karst rocky desertification distribution over the past 33 years based on remote sensing images (MSS, ETM+ and AVNIR-2) obtained in different periods. The temporal and spatial distribution characteristics of rocky desertification, vegetation degradation features and soil erosion were evaluated based on the analysis and previous research achievements. The results showed that, with expanding trend of the scale, the formation and development of rocky desertification of the Mawoshan watershed was greatly controlled by human activities. Early (1977-2002) and late (2002-2010) periods of rocky desertification presented rapid expanding and slow increase, respectively. The increase of rocky desertification areas of these two periods were 0.42 km² and 0.12 km², respectively. From 1980 to 2010, the human controlled erosion modulus reached 3 983.15 t/(km²·a) because of soil erosion resulted from intensive human activities.

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