Abstract
In recent years, the incoming sediments from upstream of the Huai River have continuously decreased. The relationship between flow and sediment has significantly changed. Therefore, the erosion and deposition characteristics of the river could be affected. To investigate this interaction between flow and sediment, the present study was conducted using the Wanglin section in the middle reach of the Huai River as the study site. A 1D hydrodynamic model was developed and validated using field data. Data from 1985–2014 were used as a continuous series while data from 2004–2014 were used as a repetitive series. The sediment variation and distribution processes at different locations were discussed. It was found that the river channel displayed several notable characteristics. In the flow direction, the channel had frontal erosion and backward deposition. The variation rate was relatively slow. With reduced sediment, the overall deposition at the Wanglin section was significantly mitigated. Future recommendations are provided based on the present simulation for flood mitigation along the Huai River.
Highlights
IntroductionPredicting the response of natural or man-made channels to imposed supplies of flow and sediment is one of the most difficult practical problems faced by hydraulic engineers
2004–2014 were used as a repetitive series
Future recommendations are provided based on the present simulation for flood mitigation along the Huai River
Summary
Predicting the response of natural or man-made channels to imposed supplies of flow and sediment is one of the most difficult practical problems faced by hydraulic engineers. The interaction between flow and sediment is one of the primary dynamic factors in shaping riverbed channels This complex interaction has been a continuous interest for river researchers and engineers. The interaction between flow and sediment along the Huai River has been significantly changed. A significant reduction in sediment has been noted in the middle reach of the Huai River [8]. It was found that the river channel erosion had been significantly increased due to sediment mining activities, which caused an uneven channel cutting in many sections of the Huai River. Investigation into the flow and water interaction in the Huai River is urgently needed. It was found that the river channel erosion had been significantly applied to rivers None of these models have been applied to the middle reach increased to sediment activities, anreasonable uneven channel cutting of the Huaidue.
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