海水準上昇に対する河川デルタの応答

• 赤松 良久

  東京工業大学大学院　日本学術振興会　総合理工学研究科

• PARKER Gary

• 武藤 鉄司

  長崎大学　環境科学部

書誌事項

タイトル別名

• RESPONSE OF RIVER DELTAS TO SEA LEVEL RISE

抄録

A consequence of the current global warming is rising sea level as Glacial ice melts. The future effect of such sea level rise on shorelines, river deltas and river long profiles is not well known. The problem may be understood by studying the consequences of Holocene sea level rise after the last glaciation. The melting of the Pleistocene glaciers caused a sea level rise of ～ 120 m, mostly in a period of 12,000 years. Here the effect of rising sea level on river deltas and long profiles is explored numerically for the Fly-Strickland River System, Papua New Guinea for Holocene sea level rise. The result shows that the Fly-Strickland River system likely went into autoretreat in response to Holocene sea level rise, and is now recovering. The effect of river size on delta response to Holocene sea level rise is also studied for three rivers, of which initial river lengths are 400km, 600km and 800km, respectively. The comparison of the three rivers indicates that the shorelines in all rivers transgress about 500 km by the time sea level stabilizes at high stand, but the prograding speeds of new deltas depend on the feed rate from upstream and therefore the delta of the large river recovers more rapidly than that of the small river.

収録刊行物

• 土木学会論文集Ｂ

  土木学会論文集Ｂ 62 (2), 169-179, 2006

  公益社団法人 土木学会

キーワード

• fluvialdelta
• sealevel rise
• global warming
• autoretreat
• morphodynamic model

詳細情報

• CRID: 1390282680229920640
• NII論文ID: 10019321691
• NII書誌ID: AA12131726
• DOI: 10.2208/jscejb.62.169
• ISSN: 18806031
• 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