Research on the stability of river mouth shoreline in the Yellow River Delta from 1996 to 2022
The current mouth of the Qing8 has undergone tremendous changes since its reconstruction.Monitoring its shoreline changes and exploring its stability are of great significance to the sustainable development of the coastal zone and the assessment of coastal zone resilience.This study uses GPS、GIS、RS technology to infer the annual average coastline position from 220 remote sensing images of the Qing8 from 1996 to 2022.At the same time,it is divided into 5 stages according to the number of swings in the estuary.Based on this,the coastline changes and its stability was quantitatively analyzed.The results show that the shoreline of Qing8 has been in a long-term dynamic change process,and the overall state is in a state of siltation.The spatiotemporal change characteristics of the shoreline of each bank segment are different,and the maximum erosion area(-73.89m/a)occurred between the two groins,the maximum siltation(393.20m/a)area appears near the river mouth area.And 90%of the coastline shows strong to severe siltation.The stability index ranges from between the two groins(0.135),to the old river mouth before the reconstruction in 2007.(0.068),and the New River Estuary(0.006)after the reconstruction in 2007 decreased successively.The amount of sediment entering the sea,changes in the location of the estuary,and sediment transport along the coast are the main reasons for the spatiotemporal differences in shoreline stability.
annual mean shorelineshoreline stabilityDigital Shoreline Analysis System3SYellow River Delta
NETL
NSTL
万方数据
