Impacts of urbanization on river system structure --A case study on Qinhuai River Basin
Rivers are influenced by natural and human factors in the evolution of streams, but are dominated by various human activities in a short term. An analysis of variance in stream structure in recent 30 years in the Qinhuai River Basin, China was performed based on remote sensing images and topographic maps by using ArcGIS. A series of river parameters derived from river geomorphology are listed to describe the status of river structure in the past and present. Results showed that urbanization caused a huge increase in the impervious area. The number of rivers in the study area has decreased and length of rivers has shortened. In past 30 years, there was a 41.03% decrease in river length. Complexity and stability of streams have also changed and consequently river channel storage volumes are not as high in intensively urbanized areas as moderately ones, indicating a greater risk of floods. Therefore, more attention should be paid to the urban disturbance to rivers.
Qinhuai River Basin river structure urbanization water environment and water resource
X.M.Ji Y.P.Xu L.F.Han
School of Geographic and Oceanic Science, Nanjing University, Nanjing 210093, China
国际会议
The 3rd Biennial ISRS Symposium Achieving Healthy and Viable Rivers (ISRS)第3届国际河流大会
北京
英文
85-91
2013-08-05（万方平台首次上网日期，不代表论文的发表时间）