Study On Yellow River Estuary Sediment Transport And It's Distributing Regulation

Yellow River estuary is typical weak tide and high sediment deposition estuary, the Yellow River sediment transport and settling deposition process is the capital factor to determine estuary evolvement characteristics. Any method provided for estuary management, there is no exception to have tight relationship with estuary sediment transport and settling deposition process. This paper summarized the Yellow River estuary basic characteristics firstly, point out existing problem in this research domain. Analyze the Yellow River estuary sediment transport and distributing affected factors, utilize the field measured data, based on the hydraulics, river hydrodynamic and statistics fundamental theory, analyze the estuary sediment transport and settling deposition regulation, Yellow River estuary gate area sediment deposition mechanism and estuary delta coastline dynamic balance, and some important achievements acquired. Study achievement appears as following aspects:(1) Yellow River estuary gate river flow and tide flow mixed area is not keep standing deposition status , on special income water and sediment conditions, boundary conditions and oceanic power conditions, this area may on the scour status;(2) Observed from estuary sediment deposition distributing process:delta and sea offing area sediment deposition vary trend is similar, each part sediment deposition scale varies as wave shape;(3) On estuary gate, affect the sediment deposition factors, primary factors are tide prop, the gate widens gradually, estuary gate have branches, brine induced flocculation. This paper study the estuary gate widen, estuary gate have branches to affect the river channel deposition in quantity;(4) Based on field measured data, for the first time, deduce the estuary sediment deposition and distributing regress formula which can estimate estuary different areas sediment deposition volume;(5) This subject demonstrate the estuary delta coastline dynamic balance conception, build the relationship between the estuary income sediment with deposition land area, draw the following important conclusion: when estuary years-averaged income sediment keeps at 345 million tons, the delta coastline may on the dynamic balance status.(6) This subject firstly brings up estuary sediment optimized control conception, and has the primary study on the macroscopically optimized control conception method.This paper summarize the estuary sediment management methods also, analyze and the following aspects and give evaluations: estuary dredging and lead the flow, lead water to scour the river channel, build the Xihekou Reservoir, estuary gate deposition management, dike reinforced etc.