Vegetation recruitment on the ‘white’ sandbars on the Nakdong River at the historical village of Hahoe, Korea
Hahoe, a historical village, is famous for two large nonvegetated sandbars. These sandbars have become covered with vegetation after construction of the two upstream dams. To identify the contributing factors to vegetation recruitment, flow regime, soil moisture, flood intensity and climate conditio...
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Published in | Water and environment journal : WEJ Vol. 28; no. 4; pp. 577 - 591 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
London
Lead Media
01.12.2014
Blackwell Publishing Ltd Wiley Subscription Services, Inc |
Subjects | |
Online Access | Get full text |
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Summary: | Hahoe, a historical village, is famous for two large nonvegetated sandbars. These sandbars have become covered with vegetation after construction of the two upstream dams. To identify the contributing factors to vegetation recruitment, flow regime, soil moisture, flood intensity and climate conditions before and after two dams were investigated. The occurrence of drought caused flow change and significant encroachment of riparian vegetation in just 3 years after the second dam was in place. Numerical results show that the dimensionless shear stress was a useful factor for predicting vegetation recruitment. Decrease in peak flows and aggradation of the sandbars resulted in more of the sandbar area experiencing low shear stress, hence facilitating vegetation colonization. In conclusion, the development of optimal dam operation rule to increase the difference of peak release flows between germination and flood season may be required to manage the riparian vegetation sustainably and economically in the regulated river. |
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Bibliography: | http://dx.doi.org/10.1111/wej.12074 Korea Institute of Construction Technology ark:/67375/WNG-P9HTZG0F-C istex:7B132EA5CECE43CDEC93F034E2B6735ADA2439A8 ArticleID:WEJ12074 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 1747-6585 1747-6593 |
DOI: | 10.1111/wej.12074 |