ZHAO Hai-jing, HU Chun-hong, CHEN Xu-jian
(China Institute of Water Resources and Hydropower Research, Beijing 100048, China)

Abstract: Based on the comprehensive review of the existing research on water and sediment transport characteristics, a formula expressing the relationship between water flow and suspended-sediment discharge were derived from ZHANG Rui-jin stream sediment carrying capacity formula by introducing the concept of suspended load concenteation of inflow. Water flow and suspended-sediment discharge relational expressions with good interrelationships of different reaches of the main channel in Yellow River from Lanzhou to Lijin were induced by carrying out multivariate regressions of the observed data. Analyses of the relations characteristics show that water flow and suspended-sediment discharge relations of Lanzhou-Shizuishan and Tongguan-Lijin reaches were affected by the running of big hydro-junctions, while those of Shizuishan-Toudaoguai and Toudaoguai-Tongguan reaches were resulted from the change of slop and the incoming of branches respectively, and the contributions to suspended-sediment discharge by water flow become less with the increase of suspended load concentration of inflow due to the self-adjusting function of the reaches.

Key words: water flow; suspended-sediment discharge; the main channel of Yellow River; stream sediment carrying capacity; suspended load concentration of inflow

Published in: Journal of Hydraulic Engineering, Vol. 43, No. 4, 2012