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ENVIRONMENTAL ASPECTS:


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Reference Panel approved
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Environmental

Tsukabaru, Japan

Positive sustainability aspect
Water quality
Kyushu Electric Power Co., Inc. developed a novel system for controlling red tide algal blooms at the Tsukabaru Dam in Japan using ship borne ultraviolet irradiation.

Source: IEA Hydropower Implementing Agreement - Annex VIII.

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Overview

The Tsukabaru Dam is a concrete gravity hydro electric dam on the Mimi River, Japan. At completion in 1938, Tsukabaru was the highest gravity type dam in Japan, standing at 87m high. It was also the first completed using mechanical technology.

The dam design has received acclaim and recognition, with patterned bridge
railing situated at the top of the dam reminiscent of the Great Wall of China and turrets at both ends similar medieval European Castles. The dam structure was nominated for Early-Modern Civil Engineering heritage status in 2001.

Tsukabaru Dam has a total storage capacity of 34,326×103 m3. Upstream of the dam, the river basin is more than 95% mountain forests and wilderness, with cultivated land amounting to less than 1% of the catchment area.

Scheme Specifications

Dam name

Scheme operator
Kyushi Electric Power Co., Inc.
Size of scheme (MW)

Country
Japan
Catchment area
410.6 km2
River
Mimi
Effective reservoir capacity
19.6 x 106 m3
Construction years
1938 construction completed
1993 Commencement of operation
Reservoir size
1.14 km2
hometop
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