noun
riverine lagoon; fluvial lagoon
A lagoon formed along a river, often a backwater or oxbow lake. Used in geography and nature contexts.
この川にはいくつかのワンドがあり、多様な水生生物が生息している。
This river has several lagoons where diverse aquatic life inhabits.
ワンドは洪水時に魚の避難場所となる。
Lagoons serve as refuges for fish during floods.
The exact origin is uncertain; it may be a loanword from a foreign language or a Japanese-coined term. The ateji 湾処 (bay/place) reflects the meaning.