rain garden
A planted depression designed to absorb rainwater runoff, often used in sustainable landscaping.
この公園には雨庭が設置され、雨水を地下に浸透させている。
A rain garden has been installed in this park to allow rainwater to soak into the ground.
Compound of 雨 (あめ, rain) and 庭 (にわ, garden). The term is a relatively modern coinage reflecting the concept of rain gardens in landscaping.