Environmental change of the fluvial-estuary system in relation to Arase Dam removal of the Yatsushiro tidal flat, SW Kyushu, Japan

作者: Sansfica M. Young , Hiroaki Ishiga

DOI: 10.1007/S12665-014-3139-3

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摘要: Chemical composition of 24 elements for sediments and suspended solids, water parameters the diatoms from Yatsushiro Bay tidal flat, Kuma River, Arase Dam have been determined to examine changes 2002 2013. In 2002, sediment delivered bay by River was restricted Dam; however, in April 2010 two gates were opened also repeated seasonal flushing allowing resumption natural transport. Bulk chemical flat has changed since with marked decreases concentrations As, Zn, Pb total sulfur. Decreased heavy metal contents 2012 2013 after opening dam is attributed dilution previously impounded quartz feldspar. Restoration transport thus brought about a recovery marine environment.

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