Surface deformation monitoring of Dongting Lake beach based on SBAS-InSAR technology
In response to the large fluctuation range of water level in the Dongting Lake area,which leads to serious incoherence issues in deformation monitoring based on InSAR technology in lake and beach areas,this article uses Sentinel-1A satellite data during the dry season from March 2017 to December 2022,and uses a small baseline subset interferometric synthetic aperture radar method to obtain surface deformation monitoring results of Dongting Lake and beach areas,revealing their spatiotemporal changes;Study the effects of factors such as erosion and sedimentation changes,precipitation,and human activities in the lake and beach areas on the surface deformation of the shoals.The results indicate that ① the spatiotemporal distribution of surface deformation in the Dongting I-Iuzhou Beach area is uneven,and the deformation rate in most areas ranges from-6 mm/month to 6 mm/month;②-There is a negative correlation between surface deformation and precipitation events in Dongting Lake during the dry season;③The surface deformation of beach areas is mainly caused by the erosion and deposition of sediment in the lake,which is closely related to changes in precipitation and dynamic changes in water cover in the lake area.
SBAS-InSARDongting Lake beachdeformation monitoring
NETL
NSTL
万方数据
