Physical and topographic factors affecting suspended particulate matter composition in a shallow tropical estuary

被引:7
|
作者
Umezawa, Yu [1 ]
Komatsu, Teruhisa [2 ]
Yamamuro, Masumi [3 ]
Koike, Isao [4 ]
机构
[1] Nagasaki Univ, Fac Fisheries, Nagasaki 8528521, Japan
[2] Univ Tokyo, Ocean Res Inst, Behav Ecol & Observat Syst Lab, Tokyo 1648639, Japan
[3] Univ Tokyo, Grad Sch Frontier Sci, Inst Environm Studies, Dept Natl Environm Studies, Kashiwa, Chiba 2778562, Japan
[4] Univ Ryukyus, Okinawa 9030123, Japan
基金
日本学术振兴会;
关键词
Resuspension; Suspended particulate matter (SPM); Stable isotopes; Mangrove; Estuaries; Multiple regression analysis; Seafloor morphology; Thailand; ORGANIC-MATTER; NUTRIENT ENRICHMENT; TURBIDITY MAXIMUM; DYNAMIC BEHAVIOR; SEDIMENT; CARBON; MANGROVE; SEAGRASS; BAY; NITROGEN;
D O I
10.1016/j.marenvres.2009.04.004
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
To better understand topography-dependent characteristics of suspended particulate matter (SPM) in a tropical shallow estuary during dry season, the physical factors causing an increase in SPM and the sources of SPM were investigated at the western coast of Thailand. Single and multiple regression analyses using physical parameters as independent variables indicated that periodic tidal current-driven resuspension, episodic wind-driven resuspension, and river-borne inputs were the most important factors controlling SPM increases in areas surrounded by sand bars, areas directly facing the ocean, and areas close to the river mouth, respectively. The assessment of the origin of increased SPM over the background levels estimated from the chemical signatures (delta C-13 and C/N ratio) at all investigated locations and for each event responsible for an increase in SPM confirmed the results of the multiple regression analyses. The results suggested that specific characteristics of SPM at each location were highly contributed by sedimentary materials and could be rather consistent through the season under similar weather conditions. (C) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码:59 / 70
页数:12
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