Abstract: Karst area is a typical ecologically fragile region where the economy development is restricted by ecoenvironmental problems. In this paper, based on the remote images and elevation data, the heterogeneity of landscape pattern with elevation in karst area in Huanjiang of Guangxi Province in 2000 was studied by using Erdas, ArcGIS and Fragstats programs. The results showed that in Huanjiang County, foothill and hill were the main geomorphic types, and woodland and shrub land were the main landscape types. Anthropogenic landscape types mainly lied in lowaltitude zones, while natural landscape types mainly distributed in highaltitude zones. Landscape patterns were evidently affected by elevation and human activities. In low-attitude zones with frequent human activities, landscape was highly fragmented, diverse, and complex; while in highattitude zones with less human activities, landscape was lowly fragmented, simplex, and simple. Because foothill was the ecotone among upland, woodland, shrub land and rural residence, its landscape pattern was complex and fugitive, being the most complex elevation zone.

Key words: Watershed, Vegetation, Soil erosion