水科学进展2012，Vol.23Issue(6)：776-781,6.
基于水流阻力与图论的河网连通性评价
Evaluation of river network connectivity based on hydraulic resistance and graph theory
摘要
Abstract
River network connectivity is an important parameter for consideration in the context of regional flood control, water supply and ecological security. Based on graph theory, the natural river network might be represented by a graph model. Taking into account the variability in delivery capacity of different channel types, the hydraulic conductivity (or the reciprocal of the hydraulic resistance) is used to describe the degree of patency within a river channel. Using the ArcGIS platform with the degree of patency as a weighted factor, the graph model can then be represented by a weighted adjacency matrix. Using MATLAB , the degree of patency within a river channel can be estimated, and the connectivity in river channel networks can also be calculated. The quantitative analysis of river network connectivity can thus be achieved. The proposed approach has been tested on a river network of the Jiaxing Plain in the Taihu Lake Basin. The result shows that the river network connectivity is improved significantly after dredging. The study provides a useful tool for evaluating the river network connectivity.关键词
河网连通性/水流阻力/防洪/图论Key words
river network connectivity/ hydraulic resistance/ flood control/ graph theory分类
天文与地球科学引用本文复制引用
徐光来,许有鹏,王柳艳..基于水流阻力与图论的河网连通性评价[J].水科学进展,2012,23(6):776-781,6.基金项目
国家自然科学基金资助项目(40730635) （40730635）
水利部公益性行业科研专项经费资助项目(201201072) （201201072）
