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流
りゅう
域
いき
治
ち
水
すい
Meanings
Noun
1. river basin management; river basin flood control; river flood risk reduction
Kanji used
流
current (in a fluid)
域
region
治
rein in
水
water
Composed of
流
りゅう
域
いき
drainage basin; catchment basin; river basin; watershed; valley
治
ち
水
すい
river management; river improvement; flood control