文献类型：期刊文献

英文题名：Calculating the Sediment Flux in Hydrometric Data-Scarce Small Island Coastal Watersheds

作者：Li, Gaocong[1,2,3];Huang, Liping[2];Deng, Longbo[2];Tong, Changliang[1,4,5]

机构：[1]Hainan Marine Geol Survey Bur, Hainan Key Lab Marine Geol Resources & Environm, Haikou 570206, Peoples R China;[2]Guangdong Ocean Univ, Coll Elect & Informat Engn, Zhanjiang 524088, Peoples R China;[3]Guangdong Prov Key Lab Intelligent Equipment South, Zhanjiang 524088, Peoples R China;[4]Hainan Geol Detect & Res Ctr, Haikou 570206, Peoples R China;[5]Marine Geol Inst Hainan Prov, Haikou 570206, Peoples R China

年份：2025

卷号：13

期号：11

外文期刊名：JOURNAL OF MARINE SCIENCE AND ENGINEERING

收录：SCI-EXPANDED(收录号：WOS:001624033500001)、、EI(收录号：20254819604413)、Scopus(收录号：2-s2.0-105022927080)、WOS

基金：Opening Foundation of Hainan Key Laboratory of Marine Geological Resources and Environment (No. HNHYDZZYHJKF015); Project for Enhancing the Practical and Innovative Abilities of Postgraduates at Guangdong Ocean University (No. 100204/080504112505).

语种：英文

外文关键词：sediment flux; global regression equations; human activities impact; pristine-modified and disturbed-modified equations; hydrometric data-scarce small coastal watersheds; Hainan Island

外文摘要：The information of sediment flux (Qs) from hydrometric data-scarce small coastal watersheds is an important supplement for interpreting the sedimentary records of continental shelf sedimentary systems. This paper proposes a solution to estimate their values based upon the empirical formula of small and medium-sized coastal watersheds in adjacent regions, taking the 25 small rivers in Hainan Island as example. Three categories of methods were applied to calculate the Qs. The first category involves the direct application of global empirical formulas, while the second and third categories utilizes empirical formulas that have been calibrated with regional characteristic data. The Qs calculation accuracy the above methods was validated by the observed values of typical rivers. Key findings include: (1) The area values of watersheds extracted from SRTM (Shuttle Radar Topography Mission) data exhibit a high correlation with actual values, confirmed the reliability and applicability of SRTM data; (2) The Global equation significantly overestimates Qs for the validation rivers (average relative error of 18.73), while employing the pristine-modified and disturbed-modified equations effectively improves the calculation accuracy (average relative errors of 0.72 and 1.64, respectively); (3) By averaging the results of different models, the Qs for the major rivers in Hainan Island was calculated as 6.07 Mt/a before large-scale human activities and 4.56 Mt/a after. This study demonstrates that modification not only needs to be considered to adjust global empirical formulas but also to differentiate between the scenarios of before and after large-scale human activities in small coastal watersheds.