In terms of ecological and environmental problems caused by human activities, changes in the pattern of land use play a decisive role in regional eco鄄security. In recent years, ecological considerations have been an important limiting factor and optimization goal, with the concept of eco鄄security reflected in land use pattern optimization. Supported by 3S technology, we chose the Huangfuchuan watershed of the Yellow River basin as the study area-a rare, sandy, gritty, intense erosion area of the world, where soil erosion and ecological water are important factors determining regional eco鄄 security. Here we carried out comprehensive research that involved the monitoring and forecasting of change in land use, soil erosion simulation, estimation of appropriate vegetation coverage, and optimization of land use. The results were as follows. (1) Over the last 10 years, there has been a general change in land use in the Huangfuchuan watershed, with the proportion of construction land, woodland, cropland and shrub increasing gradually over time (although the rate of increase
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