Change of stream network connectivity and its impact on flood control
Urbanization can alter the hydrogeomorphology of streams and rivers, change stream network structures, and reduce stream network connectivity, which leads to a decrease in the storage capacity of stream networks and aggravates flood damage. Therefore, investigation of the ways in which stream networ...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2020-12-01
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| Series: | Water Science and Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1674237020300971 |
| _version_ | 1819048760500551680 |
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| author | Yu-qin Gao Yun-ping Liu Xiao-hua Lu Hao Luo Yue Liu |
| author_facet | Yu-qin Gao Yun-ping Liu Xiao-hua Lu Hao Luo Yue Liu |
| author_sort | Yu-qin Gao |
| collection | DOAJ |
| description | Urbanization can alter the hydrogeomorphology of streams and rivers, change stream network structures, and reduce stream network connectivity, which leads to a decrease in the storage capacity of stream networks and aggravates flood damage. Therefore, investigation of the ways in which stream network connectivity impacts flood storage capacity and flood control in urbanized watersheds can provide significant benefits. This study developed a framework to assess stream network connectivity and its impact on flood control. First, a few connectivity indices were adopted to assess longitudinal stream network connectivity. Afterward, the static and dynamic storage capacities of stream networks were evaluated using storage capacity indices and a one-dimensional hydrodynamic model. Finally, the impact of stream network connectivity change on flood control was assessed by investigating the changes in stream network connectivity and storage capacity. This framework was applied to the Qinhuai River Basin, China, where intensive urbanization has occurred in the last few decades. The results show that stream network storage capacity is affected by stream network connectivity. Increasing stream network connectivity enhances stream network storage capacity. |
| first_indexed | 2024-12-21T11:21:23Z |
| format | Article |
| id | doaj.art-1eb3765e16d3476db8be1592ce73c519 |
| institution | Directory Open Access Journal |
| issn | 1674-2370 |
| language | English |
| last_indexed | 2024-12-21T11:21:23Z |
| publishDate | 2020-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Water Science and Engineering |
| spelling | doaj.art-1eb3765e16d3476db8be1592ce73c5192022-12-21T19:05:46ZengElsevierWater Science and Engineering1674-23702020-12-01134253264Change of stream network connectivity and its impact on flood controlYu-qin Gao0Yun-ping Liu1Xiao-hua Lu2Hao Luo3Yue Liu4College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China; Corresponding author.College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, ChinaCollege of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China; China Water Resources Beifang Investigation, Design & Research Co., Ltd., Tianjin 300222, ChinaUniversity of Illinois at Urbana-Champaign, Champaign IL 61820, USACollege of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, ChinaUrbanization can alter the hydrogeomorphology of streams and rivers, change stream network structures, and reduce stream network connectivity, which leads to a decrease in the storage capacity of stream networks and aggravates flood damage. Therefore, investigation of the ways in which stream network connectivity impacts flood storage capacity and flood control in urbanized watersheds can provide significant benefits. This study developed a framework to assess stream network connectivity and its impact on flood control. First, a few connectivity indices were adopted to assess longitudinal stream network connectivity. Afterward, the static and dynamic storage capacities of stream networks were evaluated using storage capacity indices and a one-dimensional hydrodynamic model. Finally, the impact of stream network connectivity change on flood control was assessed by investigating the changes in stream network connectivity and storage capacity. This framework was applied to the Qinhuai River Basin, China, where intensive urbanization has occurred in the last few decades. The results show that stream network storage capacity is affected by stream network connectivity. Increasing stream network connectivity enhances stream network storage capacity.http://www.sciencedirect.com/science/article/pii/S1674237020300971Stream network connectivityStatic storage capacityDynamic storage capacityOne-dimensional hydrodynamic model |
| spellingShingle | Yu-qin Gao Yun-ping Liu Xiao-hua Lu Hao Luo Yue Liu Change of stream network connectivity and its impact on flood control Water Science and Engineering Stream network connectivity Static storage capacity Dynamic storage capacity One-dimensional hydrodynamic model |
| title | Change of stream network connectivity and its impact on flood control |
| title_full | Change of stream network connectivity and its impact on flood control |
| title_fullStr | Change of stream network connectivity and its impact on flood control |
| title_full_unstemmed | Change of stream network connectivity and its impact on flood control |
| title_short | Change of stream network connectivity and its impact on flood control |
| title_sort | change of stream network connectivity and its impact on flood control |
| topic | Stream network connectivity Static storage capacity Dynamic storage capacity One-dimensional hydrodynamic model |
| url | http://www.sciencedirect.com/science/article/pii/S1674237020300971 |
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