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How have the river discharges and sediment loads changed in the Changjiang River basin downstream of the Three Gorges Dam? / Guo, Leicheng; Su, Ni; Zhu, Chunyan; He, Qing.

In: Journal of Hydrology, Vol. 560, 01.05.2018, p. 259-274.

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Guo, Leicheng ; Su, Ni ; Zhu, Chunyan ; He, Qing. / How have the river discharges and sediment loads changed in the Changjiang River basin downstream of the Three Gorges Dam?. In: Journal of Hydrology. 2018 ; Vol. 560. pp. 259-274.

BibTeX

@article{c8e4a30442734c58aecf4db446e6f353,
title = "How have the river discharges and sediment loads changed in the Changjiang River basin downstream of the Three Gorges Dam?",
abstract = "Streamflow and sediment loads undergo remarkable changes in worldwide rivers in response to climatic changes and human interferences. Understanding their variability and the causes is of vital importance regarding river management. With respect to the Changjiang River (CJR), one of the largest river systems on earth, we provide a comprehensive overview of its hydrological regime changes by analyzing long time series of river discharges and sediment loads data at multiple gauge stations in the basin downstream of Three Gorges Dam (TGD). We find profound river discharge reduction during flood peaks and in the wet-to-dry transition period, and slightly increased discharges in the dry season. Sediment loads have reduced progressively since 1980s owing to sediment yield reduction and dams in the upper basin, with notably accelerated reduction since the start of TGD operation in 2003. Channel degradation occurs in downstream river, leading to considerable river stage drop. Lowered river stages have caused a ‘draining effect’ on lakes by fostering lake outflows following TGD impoundments. The altered river–lake interplay hastens low water occurrence inside the lakes which can worsen the drought given shrinking lake sizes in long-term. Moreover, lake sedimentation has decreased since 2002 with less sediment trapped in and more sediment flushed out of the lakes. These hydrological changes have broad impacts on river flood and drought occurrences, water security, fluvial ecosystem, and delta safety.",
keywords = "Changjiang, River discharge, Sediment loads, Streamflow, Three Gorges Dam",
author = "Leicheng Guo and Ni Su and Chunyan Zhu and Qing He",
year = "2018",
month = "5",
day = "1",
doi = "10.1016/j.jhydrol.2018.03.035",
language = "English",
volume = "560",
pages = "259--274",
journal = "Journal of Hydrology",
issn = "0022-1694",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - How have the river discharges and sediment loads changed in the Changjiang River basin downstream of the Three Gorges Dam?

AU - Guo, Leicheng

AU - Su, Ni

AU - Zhu, Chunyan

AU - He, Qing

PY - 2018/5/1

Y1 - 2018/5/1

N2 - Streamflow and sediment loads undergo remarkable changes in worldwide rivers in response to climatic changes and human interferences. Understanding their variability and the causes is of vital importance regarding river management. With respect to the Changjiang River (CJR), one of the largest river systems on earth, we provide a comprehensive overview of its hydrological regime changes by analyzing long time series of river discharges and sediment loads data at multiple gauge stations in the basin downstream of Three Gorges Dam (TGD). We find profound river discharge reduction during flood peaks and in the wet-to-dry transition period, and slightly increased discharges in the dry season. Sediment loads have reduced progressively since 1980s owing to sediment yield reduction and dams in the upper basin, with notably accelerated reduction since the start of TGD operation in 2003. Channel degradation occurs in downstream river, leading to considerable river stage drop. Lowered river stages have caused a ‘draining effect’ on lakes by fostering lake outflows following TGD impoundments. The altered river–lake interplay hastens low water occurrence inside the lakes which can worsen the drought given shrinking lake sizes in long-term. Moreover, lake sedimentation has decreased since 2002 with less sediment trapped in and more sediment flushed out of the lakes. These hydrological changes have broad impacts on river flood and drought occurrences, water security, fluvial ecosystem, and delta safety.

AB - Streamflow and sediment loads undergo remarkable changes in worldwide rivers in response to climatic changes and human interferences. Understanding their variability and the causes is of vital importance regarding river management. With respect to the Changjiang River (CJR), one of the largest river systems on earth, we provide a comprehensive overview of its hydrological regime changes by analyzing long time series of river discharges and sediment loads data at multiple gauge stations in the basin downstream of Three Gorges Dam (TGD). We find profound river discharge reduction during flood peaks and in the wet-to-dry transition period, and slightly increased discharges in the dry season. Sediment loads have reduced progressively since 1980s owing to sediment yield reduction and dams in the upper basin, with notably accelerated reduction since the start of TGD operation in 2003. Channel degradation occurs in downstream river, leading to considerable river stage drop. Lowered river stages have caused a ‘draining effect’ on lakes by fostering lake outflows following TGD impoundments. The altered river–lake interplay hastens low water occurrence inside the lakes which can worsen the drought given shrinking lake sizes in long-term. Moreover, lake sedimentation has decreased since 2002 with less sediment trapped in and more sediment flushed out of the lakes. These hydrological changes have broad impacts on river flood and drought occurrences, water security, fluvial ecosystem, and delta safety.

KW - Changjiang

KW - River discharge

KW - Sediment loads

KW - Streamflow

KW - Three Gorges Dam

UR - http://www.scopus.com/inward/record.url?scp=85044123572&partnerID=8YFLogxK

UR - http://resolver.tudelft.nl/uuid:c8e4a304-4273-4c58-aecf-4db446e6f353

U2 - 10.1016/j.jhydrol.2018.03.035

DO - 10.1016/j.jhydrol.2018.03.035

M3 - Article

VL - 560

SP - 259

EP - 274

JO - Journal of Hydrology

T2 - Journal of Hydrology

JF - Journal of Hydrology

SN - 0022-1694

ER -

ID: 42961868