川东平行岭谷区典型水库形态的研究.docVIP

川东平行岭谷区典型水库形态的研究 　　摘 要：以川东平行岭谷区达州市大竹县的同心桥水库、乌木滩水库、龙潭水库为研究对象，基于高精度遥感影像等资料获取水库边缘线，运用标准差椭圆、盒子维数、形状指数度量水库方向特征与形状复杂度。结果表明：盒子维数能有效描述水库的边缘复杂性特征，与形状指数有较好的对应关系；3个水库中乌木滩水库盒子维数最大为1.15，形状指数8.22，同心桥水库盒子维数最小为1.0538，形状指数3.709，龙潭水库介于二者之间。标准差椭圆揭示的水库主轴倾角各有差异，但总体上呈现北东方向，与区域地貌走向总体吻合。盒子维数揭示的水库边缘形态特征受局部地形条件影响，水库主轴方向则受区域地貌宏观格局制约。 　　关键词：水库；大竹县；标准差椭圆；盒子维数 　　中图分类号 TU984 文献标识码 A 文章编号 1007-7731（2018）10-0120-05 　　Study on the Morphology of Typical Reservoirs in Paralleled Ridge-Valley of Eastern Sichuan 　　Wei Lan1，2 et al. 　　（1 Land and Resources School，China West Normal University，Nanchong 637009，China；2 Institute of Landform Surface processes and Environmental Changes，China west normal University，Nanchong 637009，China） 　　Abstract：Based on high-precision remotely sensed images and other data，the reservoir edge lines were measured using the standard deviation ellipse，box dimension，and shape index for the reservoirs of Tongxinqiao Reservoir，Wumutan Reservoir，and Longtan Reservoir in Dazhu，Dazhou County，Eastern Sichuan Province. The results are as followed. The box dimension can effectively describe the edge complexity of the reservoir and has a good correspondence with the shape index. Among the three reservoirs，the Wumutan reservoir has a maximum box dimension of 1.1529，a shape index of 8.22，the Tongxinqiao reservoir has a minimum box size of 1.0538，a shape index of 3.709，and the Longtan reservoir′s results between the two. The standard deviation ellipse reveals different inclinations of the reservoirs main shaft，but it generally presents the NEE direction，which is in general agreement with the regional landform trend. The reservoir edge morphology revealed by the box dimension is affected by the local topographic conditions and the direction of the reservoir main shaft is constrained by the regional landscape macro-pattern. 　　Key words：Reservoir；Dazhu County；Standard deviation ellipse；Box dimension 　　水库是一种半人工半自然水体，兴建水库是人类调节自然水资源在时间和空间上分布的主要手段[1]。水库通过人工筑坝建成，以防洪、发电、灌溉和航运等作用为主，但随着全球水资源供