Impact Mechanisms of Canals on Hydrological Connectivity of River and Lake System Interconnection Networks

• Published in: Shui tu bao chi xue bao Vol. 39; no. 2; pp. 167 - 178
• Main Authors: SUN Guangru, QIU Guoqiang, JIANG Xiaojun, WANG Xuewei, WANG Jing
• Format: Journal Article
• Language: Chinese
• Published: Editorial Department of Journal of Soil and Water Conservation 01.04.2025
• Subjects: canal; graph theory; hydrological connectivity; river-lake system interconnected network; swat+model
• ISSN: 1009-2242
• DOI: 10.13870/j.cnki.stbcxb.2025.02.031

［Objective］ As newly constructed river and lake system interconnection projects, canals change the connectivity pattern of the river and lake system interconnection network. Furthermore, it affects the pathways of material, energy and risk across the network, but the mechanism by which newly constructed canals affect the the river and lake system interconnection network is not yet clear. ［Methods］ The area around Laizhou Bay was selected as the study area. The SWAT+model and graph theory method were employed to analyze the hydrological connectivity of the river and lake system interconnection network under two scenarios, with and without the canal. This was done to explore the differences in the impacts of canals on the various river basins, as well as on different types of water bodies, such as lakes, low-flow streams and high-flow streams. ［Results］ In comparison to other river basins, the hydrological connectivity of the Weihe River Basin and the Mihe River Basin is greater under the no-canal scenario, wit