river basin management; river basin flood control; river flood risk reduction
A policy and engineering concept for managing flood risk across an entire river basin, including upstream, midstream, and downstream measures.
In the river basin management approach, not only dams but also forests and retarding basins are utilized.
In recent years, river basin flood control has been attracting attention as a response to climate change.
治水 is general flood control, while 流域治水 specifically refers to integrated management across the entire river basin.
洪水対策 is a broader term for flood countermeasures; 流域治水 is a specific policy framework within that.
Compound of 流域 (river basin) and 治水 (flood control). The term became prominent in Japanese water management policy in the 21st century.