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[1]YAN Ming,HE Li,WANG Yanjun,et al.Temporal and Spatial Variation of Flood-Conveying and Sediment-Transporting Capacity of the Lower Reaches of the Yellow River During 1950-2015[J].Research of Soil and Water Conservation,2019,26(04):1-6,12.

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Temporal and Spatial Variation of Flood-Conveying and Sediment-Transporting Capacity of the Lower Reaches of the Yellow River During 1950-2015

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 26 Number of periods: 2019 04 Page number: 1-6,12 Column: Public date: 2019-06-11

Title:: Temporal and Spatial Variation of Flood-Conveying and Sediment-Transporting Capacity of the Lower Reaches of the Yellow River During 1950-2015

Author(s):: YAN Ming¹, HE Li¹, WANG Yanjun², LIU Wei¹, WANG Suiji¹, PEI Liang¹, ZHENG Mingguo¹, SUN Liying¹; 1. Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China;
2. State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China

Keywords:: lower reaches of Yellow River; sediment transporting capacity; spatial and temporal variation

CLC:: TV14

DOI:: -

Abstract:: Based on data measured during 1950—2015, the flood-conveying and sediment-transporting capacities were studied by methods of time series analysis and statistical analysis. Analyses showed that, flood-conveying capacities of different sub-reaches of the lower reaches of Yellow River (LYR) were similar. The variances of capacities with time in different sub-reaches were almost constant. The flood-conveying capacity decreased in different stages, and it was closely related to discharge hydrographs from the upper and middle drainage areas. It may also be partially influenced by reservoir regulation, especially the Xiaolangdi Reservoir during water-sediment regulation. For sediment-transporting capacity, capacity of the wandering sub-reach (upper Gaocun) decreased during 1995—2000, and then it showed the increasing trend after 2000. However, the sediment-transporting capacity of the sub-reach downstream Gaocun was almost constant before 1998. After 1998, capacity of Aishan-Luokou sub-reach increased with limited magnitude, and the value for Sunkou-Aishan sub-reach decreased with limited magnitude. In total, the flood-conveying and sediment-transporting capacities decreased. Despite the decreased water runoff and sediment load, deposition in the lower channel made delivering flood and sediment through the channel worse. It indicates that enlarging the capacities of flood-conveying and sediment-transporting is the key aspect of channel regulation in the LYR.

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