沖縄地方における赤土流出モデルの開発

• 市川 温

  京都大学大学院地球環境学堂

• 藤原 一樹

  京都大学大学院地球環境学舎環境マネジメント専攻

• 中川 勝広

  独立行政法人通信総合研究所沖縄亜熱帯計測技術センター

• 椎葉 充晴

  京都大学大学院地球環境学堂

• 池淵 周一

  京都大学防災研究所

書誌事項

タイトル別名

• DEVELOPMENT OF DISTRIBUTED RED SOIL RUNOFFMODEL FOR OKINAWA REGION

抄録

Okinawa region has been suffering from severe red soil runoff which is caused by heavy rainfall and overland flow. The soil particle is very fine and will not sink once the soil is eroded and involved into water flow. The muddy water containing red soil particles pollutes the shores and coasts, and it gives heavy damage to ecosystems of the sea, farming and tourism. In this study we developed a distributed red soil runoff model which describes the erosion process of plane soil surface due to overland flow on the basis of a kinematic wave flow model and a digital topographic model. The erosion of surface soil is assumed to occur at a point where overland flow occurs. The rate of erosion is calculated by using the friction velocity at the point, which is determined from water depth of overland flow. The model was applied to Taiho River basin (24 km²), which is located at the north part of Okinawa main island. The results of simulations showed good agreements with observations, while the model needs further improvements.

収録刊行物

• 水工学論文集

  水工学論文集 47 751-756, 2003

  公益社団法人 土木学会

キーワード

• Red soil
• Kunigami Maaji
• Slope erosion
• Runoff
• Distributed model
• Okinawa region

詳細情報

• CRID: 1390282680146677376
• NII論文ID: 130003841949
• DOI: 10.2208/prohe.47.751
• ISSN: 18849172
• ISSN: 09167374
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可