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[1]PENG Wenjun,SHU Yingge.Assessment on Ecological Risk of Land Use Spatial Change at County Level in the Rocky Desertification Mountainous Area Based on GIS[J].Research of Soil and Water Conservation,2018,25(01):342-348,355.

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Assessment on Ecological Risk of Land Use Spatial Change at County Level in the Rocky Desertification Mountainous Area Based on GIS

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 25 Number of periods: 2018 01 Page number: 342-348,355 Column: Public date: 2018-02-28

Title:: Assessment on Ecological Risk of Land Use Spatial Change at County Level in the Rocky Desertification Mountainous Area Based on GIS

Author(s):: PENG Wenjun¹, SHU Yingge^1,2; 1. College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, China;
2. College of Agriculture, Guizhou University, Guiyang 550025, China

Keywords:: land use; land ecological risk; GIS; spatial variation; rocky desertification

CLC:: F301.2

DOI:: -

Abstract:: In order to explore the spatial evolution law of land use dynamic change and the evolution direction of land ecological environment in rocky desertification mountain area, the basic data were obtained from the 3 remote sensing images of Qinglong County in 1988, 2000 and 2016. With the support of RS and GIS technology, the land ecological environment risks caused by land use change in the study area were calculated by using the spatial analysis model of land use dynamic change, spatial change rate index, land ecological risk index, comprehensive ecological risk levels of land use change. The results showed that with the drastic transformation following cultivated land, grassland and unused land, the regional land ecological environment gradually deteriorated; the rising population, acceleration of urbanization process, and urban industrial land rapid expansion were threatening the ecological security of the land in the study area; in recent 30 years, the degree of land ecological risk increased first and then decreased, but in the last 16 years, the increase of comprehensive index of land use degree, the decrease of vegetation coverage index and diversity index proved that there were some problems such as the rocky desertification degree, the single landscape type, the poor ecological stability and the increasing probability of land ecological risk, the land ecological condition in Qinglong County was still deteriorating. Mutual corroboration between the results of comprehensive ecological risk levels of land use and land ecological risk index certified that it is feasible to use these methods mentioned above to evaluate the ecological risk of land use change in counties of rocky desertification mountainous area.

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