Abstract: Various factors could impact sediment transport of river flow to some extent, such as
compatibility of water-sediment flow, sediment grain size composition, water diversion volume, and
riverbed morphology. Water diversion can cause deposition increasing and decreasing through changes in
river sediment transport, and the volume of such deposition changes depend on factors of water and
sediment in the river, water diversion ratio, river boundary, etc. This paper explores the impacts of water
diversion on scour and silting in the lower Yellow mainstream under different water-sediment flow
conditions and deposition-erosion conditions based on the sediment transport laws, and quantifies the
relationship of deposition increasing (decreasing) coefficient versus diversion ratio and sediment transport
ratio. The results are useful to design of water diversion schemes and regulation of water diversion facilities
in the lower Yellow.