Development of a global sediment dynamics model

Progress in Earth and Planetary Science

Kei Yoshimura¹  Misako Hatono² 

[1] Institute of Industrial Science, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, 277-8574, Chiba, Japan;School of Engineering, Tohoku University, 6-6-06 Aoba, Aramaki, Aoba, 980-8579, Sendai, Miyagi, Japan;Graduate School of Advanced Science and Engineering, Hiroshima University, 1-4-1 Kagamiyama, 739-8527, Higashi-Hiroshima City, Hiroshima, Japan;

关键词: Global sediment dynamics;    Suspended sediment flow;    Amazon River basin;    Oceania;   

DOI  :  10.1186/s40645-020-00368-6

来源: Springer

【 摘 要 】

Sediment dynamics play an important role in various aspects of earth system modeling. In this study, we developed a global sediment dynamics model that considers suspended sediment and bedload at short timescales. We validated suspended sediment from four observation stations in the Amazon River basin and over 60 observation stations from around the world based on a variable criteria such as availability of data samples. Our model was able to effectively reproduce seasonality and spatial distribution of suspended sediment flow. However, our global estimate of approximately 4 Bt/a was significantly lower than previous estimates; therefore, we discuss potential causes of this discrepancy, including target time period and discrepancies with previous extrapolated methods. Our newly developed sediment dynamics model could provide a better understanding of global sediment transfer and contributes to various related research fields such as coastal modeling and natural disasters.

【 授权许可】

CC BY