FIELD EXPERIMENT ON SAND COVERING USING DAM-DEPOSITED SEDIMENT IN THE TIDAL FLAT AT THE MOUTH OF THE MIDORIKAWA RIVER

DOI Web Site 7 References
  • TAI Akira
    福岡工業大学 社会環境学部社会環境学科
  • KOMORITA Tomohiro
    熊本県立大学 環境共生学部環境資源学専攻
  • YAMADA Katsumasa
    熊本大学 くまもと水循環・減災研究教育センター合津マリンステーション

Bibliographic Information

Other Title
  • ダム堆積土砂を用いた緑川河口干潟への覆砂の現地実証実験
Published
2026
DOI
  • 10.2208/jscejj.25-16149
Publisher
Japan Society of Civil Engineers

Description

<p> Tidal flats are important coastal ecosystems with rich biodiversity and high water-purification capacity and serve as productive habitat substrates for shellfish harvesting and nori cultivation. However, river structures and coastal development have promoted mud deposition and habitat degradation. In this study, we conducted a field experiment applying sand covering with gravel deposited in the Midorikawa Dam lake at the mouth of the Midorikawa River tidal flat, and evaluated effects on ground elevation and the habitat conditions of Ruditapes philippinarum. Six months after covering, elevation remained stable, and both population density and shell-length growth of R. philippinarum increased markedly in sand-covered areas. In particular, using coarse materials improved the habitat environment, showing positive effects on settlement and growth.</p>

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