“Catchment basin” in Japanese
Short answer
Catchment basin in Japanese is “流域” (ryuuiki). Full meaning: drainage basin, catchment basin, river basin, watershed, valley.
Other ways to say “Catchment basin” in Japanese
流いき
ryuuiki drainage basin, catchment basin, river basin, watershed, valley
りゅういき
ryuuiki drainage basin, catchment basin, river basin, watershed, valley
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