Ecological Optimization of Spatial Patterns of Water Conservancy landscape in Qilian Mountains based on land processes: a case study of Zamu River Basin in Upper Shiyang River Basin

Abstract

Based on the relation of the ecological landscape to its ecological function, this paper takes Zamu river basin in upper Shiyang river as an example, which located in the cold region of Qilian Mountains in northwestern of China. With the use of the remote sensing data, the spatial information processing technology of GIS, suitability evaluation with the overall optimization of land use patter is applied to ascertain the function zoning and ecological pattern components of land use, to develop approaches to the ecological optimization of the spatial pattern of water conservation landscape in the mountains region. The results show that: With Zamu river basin as the research object, based on the source of the water conservation ecological landscape of frozen soil and water conservation forest, considering the zonal distribution of the frozen soil and water conservation forests in order to classification of factors such an slope, elevation, vegetation cover type and so on, we divided Zamu river valley into five ecological function regions. There are the water conservation core, water conservation buffer, water conservation excessive area, water conservation area and human development and utilization of the edge area. Also we put forward the countermeasures for protecting the each function.