Print Email Facebook Twitter Erosion potential of the Yangtze Delta under sediment starvation and climate change Title Erosion potential of the Yangtze Delta under sediment starvation and climate change Author Yang, H. F. (Shanghai Estuarine and Coastal Science Research Center; Louisiana State University) Yang, S. L. (Shanghai Estuarine and Coastal Science Research Center) Xu, K. H. (Louisiana State University) Wu, H. (Shanghai Estuarine and Coastal Science Research Center) Shi, B. W. (Louisiana State University; Nanjing University) Zhu, Q. (TU Delft Coastal Engineering) Zhang, W. X. (Shanghai Estuarine and Coastal Science Research Center) Yang, Z. (Ocean University of China) Date 2017 Abstract Deltas are widely threatened by sediment starvation and climate change. Erosion potential is an important indicator of delta vulnerability. Here, we investigate the erosion potential of the Yangtze Delta. We found that over the past half century the Yangtze's sediment discharge has decreased by 80% due to the construction of >50,000 dams and soil conservation, whereas the wind speed and wave height in the delta region have increased by 5-7%, and the sea level has risen at a rate of 3 mm/yr. According to hydrodynamic measurements and analyses of seabed sediments, the period when bed shear stress due to combined current-wave action under normal weather conditions exceeds the critical bed shear stress for erosion (τcr) accounts for 63% of the total observed period on average and can reach 100% during peak storms. This explains why net erosion has occurred in some areas of the subaqueous delta. We also found that the increase with depth of τcr is very gradual in the uppermost several metres of the depositional sequence. We therefore expect that the Yangtze subaqueous delta will experience continuous erosion under sediment starvation and climate change in the next decades of this century or even a few centuries. To reference this document use: http://resolver.tudelft.nl/uuid:abe60e9d-e473-416d-89a0-847caee2465b DOI https://doi.org/10.1038/s41598-017-10958-y ISSN 2045-2322 Source Scientific Reports, 7 (1), 1-12 Part of collection Institutional Repository Document type journal article Rights © 2017 H. F. Yang, S. L. Yang, K. H. Xu, H. Wu, B. W. Shi, Q. Zhu, W. X. Zhang, Z. Yang Files PDF s41598_017_10958_y.pdf 6.35 MB Close viewer /islandora/object/uuid:abe60e9d-e473-416d-89a0-847caee2465b/datastream/OBJ/view