文献类型：期刊文献

英文题名：Calculating the sediment flux of the small coastal watersheds: a modification of global equations

作者：Li, Gaocong[1];Xia, Qiong[1,2];Fu, Dongyang[1];Zeng, Chunhua[3];Li, Zhiqiang[1];Gao, Shu[4]

机构：[1]Guangdong Ocean Univ, Dept Marine Technol, Zhanjiang 524088, Peoples R China;[2]Southern Marine Sci & Engn Guangdong Lab Zhuhai, Zhuhai 519000, Peoples R China;[3]Guangdong Ocean Univ, Coll Ocean Engn, Zhanjiang 524088, Peoples R China;[4]East China Normal Univ, State Key Lab Estuarine & Coastal Res, Shanghai 200046, Peoples R China

年份：2021

卷号：40

期号：1

起止页码：147

外文期刊名：ACTA OCEANOLOGICA SINICA

收录：SCI-EXPANDED(收录号：WOS:000630026800015)、、Scopus(收录号：2-s2.0-85102704939)、WOS

语种：英文

外文关键词：sediment flux; global equation; modified equation; small coastal watersheds; southeast China

外文摘要：Two kinds of regression equations are used to reproduce the sediment flux of the 26 small coastal watersheds in southeastern China. The first kind is the global equations suggested by Milliman and Syvitski (1992), Mulder and Syvitski (1996), Syvitski et al. (2003), and Syvitski and Milliman (2007). The second kind is the modified equations revised by the characteristics of the coastal watersheds, including the drainage area, mean water discharge, and mean sediment discharge. Compared with the observations of the hydrometric stations, the global equations overestimate the sediment flux by 1-2 orders of magnitude. By using the modified equations, the accuracy of the estimated sediment flux is significantly improved, with the relative error in the range of 7%-24%. The reason for the overestimation mainly caused by different parameters' domain and regression coefficients between global rivers and study coastal watersheds. This study demonstrates that modification needs to be considered when using global regression equations to reproduce the sediment flux of the small coastal watersheds in southeastern China.