Trapping and escaping processes of Yangtze River-derived sediments to the East China Sea
Published:January 01, 2016
Jiaxue Wu, Jie Ren, Huan Liu, Chunhua Qiu, Yongsheng Cui, Qianjiang Zhang, 2016. "Trapping and escaping processes of Yangtze River-derived sediments to the East China Sea", River-Dominated Shelf Sediments of East Asian Seas, P. D. Clift, J. Harff, J. Wu, Y. Qui
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Contour-parallel sediment dispersal from the Yangtze Estuary into the East China Sea develops a large-scale mud belt on the inner shelf. The sediment dynamics of long-distance dispersal is, however, still an open question. This was investigated by field observations in the 2013 wet season. To clarify the physics of the large-scale mud belt, we examined: (a) shelf circulation currents and their interaction with the Yangtze River; (b) small-/meso-scale processes including bottom boundary-layer flows, stratification and mixing, upwelling, and fronts; and (c) river-borne sediment gravity and contour currents. Field observations demonstrated that estuarine turbidity maxima can trap benthic concentrated suspensions...
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River-Dominated Shelf Sediments of East Asian Seas
The rivers of East Asia are some of the largest and most important to human society and the global economy. They drain a variety of terrains from the Tibetan plateau, the hill country of southern China and the steep mountains of Taiwan. The sediment they carry potentially records the long-term evolution of continental environments within the marine stratigraphic record. Sediments reaching the ocean have to traverse the wide continental shelves where they may be reworked and transported by longshore currents, typhoon storm waves, as well as large ocean currents such as the Kuroshio. Deciphering any marine record requires us to understand the dynamics of sediment transport on the continental shelves, and this region acts as a global type example of such processes. Studies in this volume span a wide range of subdisciplines in the marine sciences and provide new insights into how sediment is distributed offshore after leaving the river mouths.