Evaluation of Plain River Network Hydrologic Connectivity Based on Improved Graph Theory

2017 4th International Conference on Environmental Systems Research

生态环境科学

Gao, Yuqin^1 ; Xiao, Xuan^1 ; Ding, Mingming^2 ; Tang, Yuqiang^1 ; Chen, Hongyu^1

College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing

210000, China^1

Water Conservancy Bureau of Nanjing, Nanjing

210036, China^2

关键词: Connectivity degree;    Connectivity factor;    HEC-HMS hydrological models;    Hydrologic connectivity;    Plain river networks;    Qinhuai River basins;    Quantitative evaluation;    Quantitative evaluation models;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/178/1/012002/pdf
DOI  :  10.1088/1755-1315/178/1/012002

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Based on graph theory, the river network was generalized by a graph model. Considering the influence of water quantity on the hydrologic connectivity of river network, the connectivity factor reflecting water quantity index was taken as the weighted value, the quantitative evaluation model of hydrologic connectivity degree was setted up. By calculating the river network weighted connectivity degree with MATLAB, the quantitative evaluation of river network hydrologic connectivity was realized. Taking the Qinhuai River Basin as an example, the HEC-HMS hydrological model was established for the simulation of short-term and long-term flood. The connectivity level of the river network in the basin under different scale floods was graded by the quantitative evaluation results of connectivity degree. The results showed that the constructed evaluation model has good applicability and reliability.