摘要
应用遥感与地理信息系统技术,通过矢量数据和栅格数据的转换和数据叠加方法,研究了丹江流域陕西片不同高程、坡度、坡向及起伏度4种地形因子下的土地利用/覆盖特征及其多样化指数。结果表明,丹江流域土地利用类型以草地为主;除水域外各种土地利用类型随高程分布特征均呈现明显的峰值特征,其中耕地、林地以及草地在海拔800～1 200m内面积比重较大;15°～25°坡度上各土地利用面积比重最大;坡向对土地利用类型分布的影响较小;海拔200～300m是林地和草地2种地类共同的起伏度临界区间。研究结果反映了土地利用变化过程及其自然驱动力影响特征,为进一步研究丹江流域土地利用结构调整和水土保持措施规划提供了科学依据与理论支持。
Land use/coverage characteristics and diversity indexes under different elevations,slopes,aspects and relief amplitudes in Danjiang River basin of Shaanxi Province were studied using RS and GIS techniques through the format conversion and identity between vector data and grid data.Results indicated that in Danjiang River basin,grassland was dominated in all the landuse types.The distributions of landuse types except water surface presented significant peaks with increased elevation.The areal proportion for cropland,forest,and grassland at the elevations from 800 to 1 200 m was the largest;the areal proportion of landuse types on 15°~25° slopes was the largest;slope aspect had little effect on the landuse distribution;and 200~300 m altitude was the common critical interval of relief amplitudes for forest and grassland.Result from the study not only reflects the landuse changes and the influence of natural driving factors,but also favors the further study of landuse structural adjustment and soli and water conversation planning in Danjiang River basin.
出处
《水土保持通报》
CSCD
北大核心
2012年第1期201-206,共6页
Bulletin of Soil and Water Conservation
基金
陕西教育厅科研项目"淤地坝泥沙沉积与侵蚀产沙耦合关系研究"(06JK215)
陕西省教育厅重点实验室项目"丹汉江水源区水土流失非点源污染过程与调控"(09JS094)
国家自然科学基金项目"植被格局对坡沟水蚀过程调控机理研究"(41071182)
关键词
地理信息系统
土地利用
地形因子
空间分析
多样化指数
geographic information system
landuse
terrain factor
spatial analysis
diversity index
