Long term variation of unconfined and confined groundwater level and quality in Ota River estuary

• NAKASHITA Shinya

  Hiroshima University

• NAGATSU Yoshiyuki

  Hiroshima University

• KOMAI Katsuaki

  Kitami Institue of Technology

• HIBINO Tadashi

  Hiroshima University

Bibliographic Information

Other Title

• 太田川感潮域における不圧・被圧地下水位と水質の長期変動
• オオタガワカン チョウイキ ニ オケル フアツ ・ ヒアツ チカ スイイ ト スイシツ ノ チョウキ ヘンドウ

Abstract

Groundwater circulation is one of important substance transportation process in delta area. It is affected by the variation of groundwater level and quality. To understand variation factors of unconfined and confined groundwater level and quality in Ota River Delta, the long term data were analyzed since 1975 to 2012. The confined groundwater level is varied with sea water level and upper river water level. Moreover, the sea water level in Hiroshima bay increases 20 cm compared with 1975 and the confined groundwater level increases 130 cm compared with 1975. The unconfined groundwater is varied with precipitation.

Journal

• Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)

  Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 70 (2), I_1216-I_1220, 2014

  Japan Society of Civil Engineers

Keywords

• unconfined groundwater
• confined groundwater
• groundwater level
• groundwater quality
• long term variation

Details

• CRID: 1390001205319417984
• NII Article ID: 130004706790
• NII Book ID: AA12508551
• DOI: 10.2208/kaigan.70.i_1216
• ISSN: 18838944
• ISSN: 18842399
• NDL BIB ID: 025935310
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I025935310
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed