西北林学院学报2012，Vol.27Issue(3)：167-173,7.DOI:10.3969/j.issn.1001-7461.2012.03.34
秃尾河流域不同地形条件下土地利用动态变化
Dynamic Changes of Land Use Types Based on Various Topographic Factors in Tuweihe Basin
摘要
Abstract
Based on geographic information system (GIS) spatial analysis technology, the overlay analysis of the topographic factors (elevation, slope and aspect) were derived from digital elevation model (DEM), which were then applied to carry out spatial overlay analysis with the graphs of land use types in 1985 and 2000 to obtain the distribution characteristics of the land use types under different conditions of topographic factors, and to further examine the responses of the dynamic variations of the land use types to topographic factors in Tuweihe Basin. The results showed that the farmland, grassland and the forestland were the main land use types. During the period from 1985 to 2000, there was obvious transformation from grassland and forestland to farmland. The topographic factors significantly influenced the land use types. The areas of farmland and grassland took up the highest proportions at the elevation level of 1 000~1 200 m, the slope gradient of 3-8° and the sunny aspect regions, but the distribution of those two land use types decreased with the increases of elevation and slope gradient. Forestland was distributed at various elevation levels, slope gradients and aspects, but at the elevation level of 1 000-1 200 m, the slope gradient of 8~15°and the shaded slope occupied for the main regions. Elevation and slope had the significant effects on water area, non-used land and the residential land while the aspect imposes little influence. The farmland and the residential land increased in different levels of elevation, .slope and aspect over these 16 years, whereas the areas of forest land and grassland gradually decreased.关键词
土地利用类型/地形因子/GIS/秃尾河流域Key words
land use type/ topographic factors/ G1S/ Tuweihe Basin分类
管理科学引用本文复制引用
刘智勇,张鑫,李小冰..秃尾河流域不同地形条件下土地利用动态变化[J].西北林学院学报,2012,27(3):167-173,7.基金项目
国家高技术研究发展计划("863"计划)项目(14110209) （"863"计划）
国家重大科技支撑计划项目(2006BAD11B05) （2006BAD11B05）
西北农林科技大学博士科研启动基金项目(01140504) （01140504）
西北农林科技大学科研专项(08080230). （08080230）
