Impact of Tide Gate Operation on Sediment and Water Quality of Yongding New River
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The construction of tide gate at Yongding New River estuary will influence the transportation of water, sediment and pollutant, and these changes at upstream/downstream of sluice will be different under different operation mode, which also in turn restricts the scheduling plan. In order to provide a basis for the selection of tide gate operational modes, the 1-D mathematical model for unsteady flow-sediment-water quality in channel with a sluice has been established, which was used to study the impact of tide gate operation of Yongding New River. The result shows that, comparing with the operation mode which only storing fresh water, the water quality will be better with the operation mode which storing sea water. And the water quality gradually improved with higher storage water level. However, there will be more deposition upstream & downstream of tide gate.
KeywordsTidal reach Water lock Sedimentation Pollutant transportation Yongding new river
This work was supported by the National Key R&D Program of China (2016YFC0402309),the National Natural Science Foundation of China (Grant No. 51779014), the public industry research special funding projects of Ministry of Water resources (Grant No. 201501002-1), the Special fund for basic scientific research business of central public research institutes (Grant No. CKSF2015049/HL).
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