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| Evaluation of Land Use Suitability at the Vulnerable Ecological Area Based on RS/GIS |
| Zhang Xiaoping,Li Rui，Yang Qinke |
| Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, 712100, Yangling, Shaanxi, China |
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Abstract Land use planning is crucial to the areas that are under severing soil erosion. Land evaluation is an important basis for landscape and land use planning. A framework was developed for land evaluation in Liudaogou watershed with typical characteristics of water-wind erosion crisscross region, in the loess plateau, focusing on integrative, process and ecological analysis. Landuse data in 1990 and 2002 were collected from RS data and GIS was used for data storage and analysis. The landuse rational index from the point of land slope degree for two periods was calculated and four limiting factors (the section of landform, slope degree, soil type and soil erosion intensity) were selected and their ranking and weighted contribution were given to evaluate the suitability of current land source for farmland, grassland and forest separately in 2002. By comparing the different suitability of current farmland, grassland and woodland, measures for better land use and conservation are suggested.
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Received: 16 July 2004
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