黄河下游引黄灌区输沙渠道优化设计.

There are nearly 100 irrigation areas with the area above 10 000 mu alongside the Lower Yellow River. Irrigation from the Yellow River has brought huge benefits to agriculture, but sedimentation in channels is very serious. The key reason is that there is no reliable formula to calculate sediment transport capacity in channels and the cross-section of channels is not determined according to hydraulic optimization, which leads to larger cross-section and lower flow velocity than that needed for equilibrium sediment transport. By introducing sediment transport equilibrium relationship using sediment grading in the Lower Yellow River and the optimization methods of channel cross-sections, it had been found in this paper that the sediment transport capacity in irrigation channels could be doubled. This optimized design would introduce theoretical basis for the improvement of irrigation channels mid transportation of sediment into farm fields, and it also provided new technical support for long-distance transport of high -concentrated sediment-laden from for the Yd.low River. [ABSTRACT FROM AUTHOR]