noun
Refers to a ridge of sand or gravel formed in a river, lake, or coastal area. Used in geography and everyday descriptions.
河口に大きな砂州ができている。
A large sandbar has formed at the river mouth.
干潮になると砂州が現れる。
The sandbank appears at low tide.
Compound of 砂 (sand) and 州 (sandbank/shoal). The variant 砂洲 uses 洲, which also means sandbank or islet.