基于DEM的三峡库区涪陵段RDLS研究

Research on RDLS in Fuling Section of the Three Gorges Reservoir Area Based on DEM

选取三峡库区涪陵段1∶5000DEM数据,以GIS技术为平台,借鉴RDLS计算模型,尝试多种最佳窗口分析法计算得到三峡库区涪陵段的RDLS。结果表明,(1)三峡库区涪陵段RDLS介于0.14~2.34之间,其中大部分的区域位于中低值;(2)RDLS高值区域位于东南部武陵山和南部同乐乡地区,RDLS低值区域位于长江和乌江的沿岸地区;(3)三峡库区涪陵段RDLS由东南向西北方向依次递减,其变化趋势与海拔高度变化趋势基本一致。

Using the 1 ∶5 000 DEM data of the Fuling Section of the Three Gorges Reservoir Area, taking GIS as the platform, using the RDLS calculation model, this paper used several best window analysis methods to calculate the RDLS in Fuling Section of the Three Gorges Reservoir Area. The results show that(1)the topographic relief range of the Fuling Section of the Three Gorges Reservoir Area is 0.14~2.34, most of which are located at the middle and low value.(2)The topography of the Fuling Section of the Three Gorges Reservoir Area is descending gradually from southeast to northwest, and the trend of change is consistent with the trend of altitude change in the Fuling Section of the Three Gorges Reservoir Area.