[1]WANG Suiji,LIU Wei,YAN Ming,et al.Stepped Changes in Suspended Sediment Transport Efficiency and Discharge Ratio and the Main Causes in the Lower Reaches of Yellow River[J].Research of Soil and Water Conservation,2020,27(02):104-111.
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Stepped Changes in Suspended Sediment Transport Efficiency and Discharge Ratio and the Main Causes in the Lower Reaches of Yellow River
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 02
Page number:
104-111
Column:
Public date:
2020-03-30
- Title:
- Stepped Changes in Suspended Sediment Transport Efficiency and Discharge Ratio and the Main Causes in the Lower Reaches of Yellow River
- Keywords:
- suspended sediment transport efficiency; suspended sediment discharge ratio; the lower reaches of Yellow River
- CLC:
- TV141.3
- DOI:
- -
- Abstract:
- The purpose of this paper is to reveal the change trend of sediment scouring and silting and its main influencing factors in the lower reaches of Yellow River. Based on the measured data of runoff and suspended sediment load(SSL)at the Huayuankou and Lijin stations(channel cross-sections)in the lower reaches of the Yellow River since 1960, the phased variations of the runoff and SSL in flood seasons was analyzed by means of double cumulative curve analysis. By using linear regression analysis, the suspended sediment transport efficiency(SSTE)at the channel cross-sections and suspended sediment discharge ratio(SSDR)in the channel reach between the stations for flood seasons of different stages are obtained. The results showed that five different stages, 1960—1965, 1966—1981, 1982—1987, 1988—1999, and 2000—2015, appeared in the STE variations at the cross-sections since 1960, when the average SSTE of the two cross-sections was 2.1, 4.3, 2.6, 4.1, 0.8 t/100 m3, respectively, while the SSDR in the river reach from Huayuankou to Lijin stations of the lower reaches of Yellow River was 1.34, 0.78, 1.01, 0.62, 1.48, respectively; the phased variations of SSTE and SSDR in flood seasons revealed the essential characteristics of erosion and siltation evolution in this reach; the climate change and soil and water conservation measures in the Yellow River Basin just caused changes in water and sediment yield, and had a limited effect on SSTE and SSDR in the lower reaches of Yellow River during flood seasons; however, the construction and operation mode of the large reservoirs in the main river channel of the Yellow River are the main control factors on SSTE and SSDR change; in addition, the natural damages of some silt storage dams in the middle and upper reaches of the Yellow River have the significant effect on the variations of SSTE and SSDR in the lower reaches of Yellow River during the period 1988—1999.
- References:
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Last Update:
2020-02-25