Numerical Simulation Prediction of Sediment Erosion and Deposition in the Yellow River Delta Based on MIKE21
Due to natural environmental changes and human interventions,the coastline of the Yellow River Delta has been in constant change,and it is of great significance to explore the changes in the coastline of the delta region for economic development and ecological protection.Based on the MIKE21 mathematical model,this paper establishes a sediment scouring and silting model under shoreline conditions in different years,com-pares and verifies the changes of scouring and siltation in Diaokou from 2015 to 2023,and verifies the accuracy of the sediment model setting in the Yellow River.On this basis,three sets of runoff and sediment working con-ditions were set up to predict the erosion and siltation changes in the waters near the Yellow River estuary from 2023 to 2030.The results are as follows.Under the conditions of the minimum runoff and sediment transport of the Yellow River for many years,there is a small amount of erosion in the Yellow River estuary,the northeast of the Yellow River Delta is basically balanced in scouring and silting,and a small amount of erosion is in the old Yellow River estuary.Under the conditions of multi-year average runoff and sediment transport,there is about 3 m of siltation in the north-northeast direction of the Yellow River estuary,and the Yellow River estuary and the old Yellow River estuary continue to scour,and the most serious part is about 3 m.Under the condition of 85%of the runoff and sediment transport of the Yellow River for many years,the Yellow River estuary and the old Yellow River estuary continue to be scoured,and the most serious part is about 3 m,and the northward silt-ation of the Yellow River can reach 1.5 m.The results of this study can better understand the changes of the coastline of the Yellow River Delta,and provide scientific guidance for the future development,management and sustainable development of the coastal zone of the Yellow River estuary.
the Yellow River Deltasediment scouringMIKE21numerical simulation
NETL
NSTL
万方数据
