Changes in river water quality by impoundment as the cause of discontinuity in the river continuum

• KAGAWA Hisanori

  College of Agriculture, Ehime University

Bibliographic Information

Other Title

• ダム構造物の影響　　河川連続体で不連続の原因となるダム貯水による水質変化
• カセン レンゾクタイ デ フレンゾク ノ ゲンイン ト ナル ダム チョスイ ニ ヨル スイシツ ヘンカ

Abstract

The author firstly introduces three fundamental concepts regarding river ecosystems, i.e. river continuum, serial discontinuity and nutrient spiralling. Secondly, the author reviews the states of discontinuity caused by impoundment of rivers in five categories of water quality, i.e. water temperature, particulate matter, chlorophyll-a, nutrients and anaerobic water environment, taking into consideration with the effects of water quality changes on the downstream ecosystems. Finally, the author discusses measures to mitigate discontinuities using natural water movements and natural substances, and recommends the throughflow regulation method and the application of barley straw, especially against eutrophication.

Journal

• Ecology and Civil Engineering

  Ecology and Civil Engineering 2 (2), 141-151, 1999

  Ecology and Civil Engineering Society

Keywords

• discontinuity
• eutrophication
• reservoir
• river continuum
• water quality

Details

• CRID: 1390001204473176192
• NII Article ID: 10021975838
• NII Book ID: AA11528360
• DOI: 10.3825/ece.2.141
• ISSN: 18825974
• ISSN: 13443755
• ISSN: http://id.crossref.org/issn/13443755
• NDL BIB ID: 4955252
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4955252
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed