Analysis of the law and mechanism of the erosion and deposition of the Lvsi area in recent 30 years
Based on the hydro-topographical data of the area from 1989 to 2019,the study area is 34369 m2.Establishing the DEM model,the paper used Kriging Interpolation and mathematical statistics to quantitatively analyze the mechanism of the erosion and deposition of Lvsi area.The results showed that the subsea terrain of Lvsi Area had turned from deposition to erosion in the past 30 years.The to-tal sediment deposition volume was 54 million cubic meters from 1989 to 2006.The erosion started since 2006,and the total volume of the eroded sediment had been maintained between-5 and-13 million cubic meters.On the one hand,the erosion was attributed to the decreasing of the regional sediment supply due to the declining of the rate of sediment transport in Yangtze basin and along the coastline of northern Jiangsu.On the other hand,the hydrodynamic change of current and tide due to the reclama-tion projects along the coastline also caused the erosion.
Lvsi Areatopographic evolutionthe law of erosion and depositionmechanism analysis
NETL
NSTL
万方数据
