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Soil erosion and deposition in the new shorelines of the Three Gorges Reservoir
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences. Key Laboratory of Eco-Environments in Three Gorges Reservoir Region (Ministry of Education), Chongqing Key Laboratory of Plant Ecology and Resources in Three Gorges Reservoir Region, School of Life Sciences, Southwest University, Beibei, Chongqing 400715, PR China.
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
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2017 (English)In: Science of the Total Environment, ISSN 0048-9697, E-ISSN 1879-1026, Vol. 599, 1485-1492 p.Article in journal (Refereed) Published
Abstract [en]

During the last few decades, the construction of storage reservoirs worldwide has led to the formation of many new shorelines in former upland areas. After the formation of such shorelines, a dynamic phase of soil erosion and deposition follows. We explored the factors regulating soil dynatitics in the shorelines of the Three Gorges Reservoir (TGR) on the Yangtze River in China. We selected four study sites on the main stem and three on the tributaries in the upstream parts of the reservoir, and evaluated whether the sites close to the backwater tail (the point at which the river meets the reservoir) had more soil deposition than the sites far from the backwater tail. We also tested whether soil erosion differed between the main stem and the tributaries and across shorelines. We found that soil deposition in the new shorelines was higher close to the backwater tail and decreased downstream. Soil erosion was higher in the main stem than in the tributaries and higher at lower compared to higher shoreline altitudes. In the tributaries, erosion did not differ between higher and lower shoreline levels. Erosion increased with increasing fetch length, inundation duration and distance from the backwater tail, and decreased with increasing soil particle fineness. Our results provide a basis for identifying shorelines in need of restorative or protective measures.

Place, publisher, year, edition, pages
Elsevier, 2017. Vol. 599, 1485-1492 p.
Keyword [en]
Reservoir margins, Soil dynamics, Three Gorges Dam, Yangtze River
National Category
Soil Science Environmental Sciences related to Agriculture and Land-use
Identifiers
URN: urn:nbn:se:umu:diva-137925DOI: 10.1016/j.scitotenv.2017.05.001ISI: 000405253500045PubMedID: 28531957OAI: oai:DiVA.org:umu-137925DiVA: diva2:1129589
Available from: 2017-08-04 Created: 2017-08-04 Last updated: 2017-08-04Bibliographically approved

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