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 Planning and designing a dry dam

Essentially, dams constantly store river water in their reservoirs to supply water or for replenishment. However, dry dams, which have their discharge system on the riverbed and which store water only during floods, and are normally not submerged, have recently attracted interest. The planning of dry dams involves the following different factors from conventional dams:

[1] Mitigation of environmental impact such as by shortening the discharge time of turbid water by storing flood discharges and preventing the upstream migration of fish.

[2] Ensuring the continuous movement of sediment in the river.

[3] Reducing the size and construction cost of dams.

The Japan Dam Engineering Center is studying reservoir planning that considers the shape of the deposition of sediment inside the reservoir or designing discharge facilities to discharge sediment downstream during flood discharge for dry dams, which is a new concept for dams.

  Masudagawa Dam

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