Document Detail

River channel network design for drought and flood control: A case study of Xiaoqinghe River basin, Jinan City, China.
MedLine Citation:
PMID:  19683855     Owner:  NLM     Status:  MEDLINE    
Vulnerability of river channels to urbanization has been lessened by the extensive construction of artificial water control improvements. The challenge, however, is that traditional engineering practices on isolated parts of a river may disturb the hydrologic continuity and interrupt the natural state of ecosystems. Taking the Xiaoqinghe River basin as a whole, we developed a river channel network design to mitigate river risks while sustaining the river in a state as natural as possible. The river channel risk from drought during low-flow periods and flood during high-flow periods as well as the potential for water diversion were articulated in detail. On the basis of the above investigation, a network with "nodes" and "edges" could be designed to relieve drought hazard and flood risk respectively. Subsequently, the shortest path algorithm in the graph theory was applied to optimize the low-flow network by searching for the shortest path. The effectiveness assessment was then performed for the low-flow and high-flow networks, respectively. For the former, the network connectedness was evaluated by calculating the "gamma index of connectivity" and "alpha index of circuitry"; for the latter, the ratio of flood-control capacity to projected flood level was devised and calculated. Results show that the design boosted network connectivity and circuitry during the low-flow periods, indicating a more fluent flow pathway, and reduced the flood risk during the high-flow periods.
Baoshan Cui; Chongfang Wang; Wendong Tao; Zheyuan You
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2009-08-15
Journal Detail:
Title:  Journal of environmental management     Volume:  90     ISSN:  1095-8630     ISO Abbreviation:  J. Environ. Manage.     Publication Date:  2009 Aug 
Date Detail:
Created Date:  2009-08-31     Completed Date:  2009-11-03     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401664     Medline TA:  J Environ Manage     Country:  England    
Other Details:
Languages:  eng     Pagination:  3675-86     Citation Subset:  IM    
School of Environment, Beijing Normal University, State Key Joint Laboratory of Environmental Simulation and Pollution Control, No. 19 Xinjiekouwai Street, Beijing 100875, China.
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MeSH Terms
Water Movements

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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