首页|Landsat Image-Based Spatiotemporal Variation Analysis of Erosion and Deposition off the Qingshuigou of the Yellow River Delta from 1984 to 2021
Landsat Image-Based Spatiotemporal Variation Analysis of Erosion and Deposition off the Qingshuigou of the Yellow River Delta from 1984 to 2021
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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 devel-opment.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 depo-sition evolution was also analyzed using wavelet analysis.Results showed that the total area of the Qingshuigou was affected by deposi-tion and erosion and that the fluctuation first increased and then decreased.The total area reached a maximum in 1993.The deposi-tional area first increased and then decreased,whereas the overall erosion area decreased.Deposition and erosion areas showed peri-odic 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.
Yellow River Deltacoastlineerosion and depositionremote sensingwavelet analysis
DONG Sheng、LI Songda、TAO Shanshan
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College of Engineering,Ocean University of China,Qingdao 266404,China
National Key Research and Development Program of China
NETL
NSTL
万方数据
