Landsat Image-Based Spatiotemporal Variation Analysis of Erosion and Deposition off the Qingshuigou of the Yellow River Delta from 1984 to 2021  

作　　者：DONG Sheng LI Songda TAO Shanshan 

机构地区：[1]College of Engineering,Ocean University of China,Qingdao 266404,China

出　　处：《Journal of Ocean University of China》2024年第5期1173-1184,共12页中国海洋大学学报（英文版）

基　　金：supported by the National Key Research and Development Program of China(No.2022YFC3204301).

摘　　要：Owing to climate change and human activity,the Qingshuigou of the Yellow River Delta(YRD)has undergone dynamic changes in erosion and deposition.Therefore,studying these changes is important to ensure ecological protection and sustainable development.In this study,the trend of erosion-deposition evolution in the Qingshuigou was investigated based on 38 coastline phases extracted from Landsat series images of the YRD at one-year intervals from 1984 to 2021.The periodicity of the scouring and deposition evolution was also analyzed using wavelet analysis.Results showed that the total area of the Qingshuigou was affected by deposition and erosion and that the fluctuation first increased and then decreased.The total area reached a maximum in 1993.The depositional area first increased and then decreased,whereas the overall erosion area decreased.Deposition and erosion areas showed periodic changes to some extent;however,the periodic signal intensity decreased.Furthermore,factors including channel morphological evolution and variations in water and sediment discharge affect the spatiotemporal dynamics of erosion and deposition processes.The application of nonconsistency tests finally revealed that deposition area and flushing magnitude exhibited non-stationarities,which are potentially attributed to impacts from climatic change drivers.

关 键 词：Yellow River Delta COASTLINE erosion and deposition remote sensing wavelet analysis 

分 类 号：P343.5[天文地球—水文科学] P512.2[天文地球—地球物理学] P237