INFLUENCE OF WATERWORKS FACILITIES ON CHANNEL PROCESSES IN THE LOWER REACHES OF THE HUANG HE AND YANGTZE RIVERS
Abstract
Specific features of channel transformation are discussed for the largest rivers of China downstream the Three Gorges and Gezhouba waterworks on the Yangtze River and Sanmenxia and Xiaolangdi waterworks on the Huang He River which were put into operation during the end of the 20th century and the beginning of the 21st century. They differ from the rivers ofRussiain reservoir regimes (decrease of storage during the summer high-water period and accumulation during the winter low-water period), high sediment yields, partly retention of bed load in reservoirs, practically total damming of rivers downstream the waterworks and other large-scale flood-control regulations. Different rates and forms of river incision, e.g. the absence of sediment accumulation in front of channel scour, were identified, as well as different stream-bank erosion processes and resulting channel widening typical mostly for theHuang HeRiver. This is mainly the result of the narrowing channel-forming zone limited by the flood-control dams and the removal of meanders (on theYangtze River). Positive effects of incision succeeding the sediment accumulation typical for the rivers before the waterworks construction are the reduction of dam failure risk and the lower probability of inundation of developed areas.
Keywords
channel processes,
tail bay,
water reservoir,
sediment yield,
incision,
stream-bank erosion,
the Huang He River,
the Yangtze River
Supporting agencies: RFBR (project 15-05-037520 and the Presidential Programme of Support for the RF Leading Scientific Schools (SSc-1010.2014.5)
About the Authors
R. S. Chalov
Lomonosov Moscow State University
Russian Federation
Professor, D.Sc. in Geography; Faculty of Geography, Department of Land Hydrology
Russian Federation
Professor, D.Sc. in Geography; Faculty of Geography, Department of Land Hydrology
Yean Zhao
Yellow River Institute of Hydraulic Research, Zhengzhou
China
Professor
China
Professor
T. I. Volkova
Lomonosov Moscow State University
Russian Federation
Post-graduate student; Faculty of Geography, Makkaveev Research Laboratory of Soil Erosion and Channel Processes
Russian Federation
Post-graduate student; Faculty of Geography, Makkaveev Research Laboratory of Soil Erosion and Channel Processes
Shuguang Liu
Tongji University, Shanghai
China
Professor
China
Professor
S. R. Chalov
Lomonosov Moscow State University
Russian Federation
Senior Research Scientist, Ph.D. in Geography; Faculty of Geography, Department of Land Hydrology
Russian Federation
Senior Research Scientist, Ph.D. in Geography; Faculty of Geography, Department of Land Hydrology
A. S. Zavadsky
Lomonosov Moscow State University
Russian Federation
Leading Research Scientist, Ph.D. in Geography; Makkaveev Research Laboratory of Soil Erosion and Channel Processes
Russian Federation
Leading Research Scientist, Ph.D. in Geography; Makkaveev Research Laboratory of Soil Erosion and Channel Processes
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Review
For citations:
Chalov R.S., Zhao Ye., Volkova T.I., Liu Sh., Chalov S.R., Zavadsky A.S. INFLUENCE OF WATERWORKS FACILITIES ON CHANNEL PROCESSES IN THE LOWER REACHES OF THE HUANG HE AND YANGTZE RIVERS. Vestnik Moskovskogo universiteta. Seriya 5, Geografiya. 2015;(5):67-75. (In Russ.)
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