Effects of dams on physical environment of rivers

DOI 15 Citations Open Access

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Other Title
  • ダム構造物の影響　　ダムが河川の物理的環境に与える影響　　河川工学及び水理学的視点から
  • 河川工学及び水理学的視点から

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Description

Dams and reservoirs are constructed in order to regulate river discharge from the view points of flood control and water resource development. Reservoirs store water but bring discontinuity of sediment, other materials and even organisms. Reservoir sedimentation is one of globally serious problems. Ecosystems not only around reservoirs but also in the downstream reaches must be degenerated. The latter is focussed on in the present paper particularly from the aspects of river engineering and hydraulics. The effects of dams on the downstream reaches are brought by changes in the temporal pattern of water discharge and decrease in sediment supply. Fluvial processes in such rivers are characterized by river-bed degradation, armoring, drying up of bars and flood plains, invasion of vegetation, deposition of fine material and so on. Understanding of such processes must be important in environmental assessment of new dam projects and following-up management of previously constructed dams. Evaluation of habitat suitability is also required there as one of rivereneineering subiects.

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Details 詳細情報について

  • CRID
    1390282679449886976
  • NII Article ID
    130003441718
  • DOI
    10.3825/ece.2.103
  • ISSN
    18825974
    13443755
    http://id.crossref.org/issn/13443755
  • Text Lang
    ja
  • Data Source
    • JaLC
    • Crossref
    • CiNii Articles
    • OpenAIRE
  • Abstract License Flag
    Disallowed

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