[1]ZHANG Xiao-zhong,WANG Sha,SHEN Nan,et al.Experimental Study on Variations of Sediment Concentration in Water Flow on Waste Grassland in Banduo Hydropower Station Construction Area of Yellow River[J].Research of Soil and Water Conservation,2014,21(02):72-75,81.
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Experimental Study on Variations of Sediment Concentration in Water Flow on Waste Grassland in Banduo Hydropower Station Construction Area of Yellow River
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
21
Number of periods:
2014 02
Page number:
72-75,81
Column:
Public date:
2014-04-28
- Title:
- Experimental Study on Variations of Sediment Concentration in Water Flow on Waste Grassland in Banduo Hydropower Station Construction Area of Yellow River
- Keywords:
- Yellow River; Banduo hydropower station; construction area; waste grassland; sediment concentration
- CLC:
- S157
- DOI:
- -
- Abstract:
- Waste grassland is the main primary land type in the construction area of Banduo hydropower station of the Yellow River. Elucidating variations of sediment concentrations in water flow in the processes of runoff and sediment yield may provide an important basis for the quantitative evaluation of soil and water loss in the area. The variations of sediment concentrations over waste grassland were studied by a field scouring experiment conducted in the construction area of Banduo hydropower station of the Yellow River. Results showed that in the case of different added discharges, sediment concentration varies with added water discharge and manifests a trend of the overall decrease and eventual steady sate, which can be well described by using a power equation. At different slope degrees, sediment concentration also shows an overall decreasing trend and finally approaches to a steady state in 15 min after water is added. The variations of different slope degrees are basically consistent and can be also well described by using a power equation. Comparatively, a major difference is that the decreased rate of sediment concentration in the case of different slope degrees is greater that in the case of different discharges 5 min after runoff generated and later on, less than that in the case of different discharges. The variation of the average sediment concentration with added discharge can be well described by using a parabolic equation and the critical discharge for an abrupt change is found to be 7.388 5 L/min. The average sediment concentration increases rapidly with rise of slope degree, which can be well described by an exponential equation. The variation of the average sediment concentration with slope degree and added discharge can be well described by using a dual power equation.
- References:
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Last Update:
1900-01-01