Please use this identifier to cite or link to this item: http://archive.cmb.ac.lk:8080/xmlui/handle/70130/5874
Title: Environmental change of the fluvial-estuary system in relation to Arase Dam removal of the Yatsushiro tidal flat, SW Kyushu, Japan
Authors: Young, Sansfica M.
Ishiga, Hiroaki
Keywords: Marine environment
Kuma River
Tidal flat
Yatsushiro Bay
Arase Dam
Recovery
Issue Date: 2014
Publisher: Springer-Verlag Berlin Heidelberg
Citation: Young, Sansfica M. & Ishiga, Hiroaki (2014). Environmental change of the fluvial-estuary system in relation to Arase Dam removal of the Yatsushiro tidal flat, SW Kyushu, Japan, Environmental Earth Sciences, 72, 2301–2314 http://doi.org/10.1007/s12665- 014-3139-3
Abstract: Chemical composition of 24 elements for sed iments and suspended solids, water parameters and the diatoms from Yatsushiro Bay tidal flat, Kuma River, and Arase Dam have been determined to examine changes from 2002 to 2013. In 2002, sediment delivered to the bay by the Kuma River was restricted by the Arase Dam; however, in April 2010 two gates were opened and also repeated sea sonal flushing allowing resumption of natural sediment transport. Bulk chemical composition of the tidal flat sed iments has changed since 2002, with marked decreases in concentrations of As, Zn, Pb and total sulfur. Decreased heavy metal contents in 2012 and 2013 for bay sediments after opening the dam and repeated flushing is attributed to dilution by previously impounded quartz and feldspar. Restoration of natural sediment transport by opening the dam and repeated flushing has thus brought about a recovery in the Yatsushiro marine environment.
URI: http://archive.cmb.ac.lk:8080/xmlui/handle/70130/5874
Appears in Collections:Department of Environmental Technology

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