泥でい流りゅう

noun

mudflow; volcanic mud flow

A flow of water-saturated volcanic ash and debris, often triggered by heavy rain on volcanic slopes. Used in geology and disaster contexts.

• 火か山ざんの噴ふん火か後ご、大おお雨あめで泥でい流りゅうが発はっ生せいした。

  After the volcanic eruption, heavy rain caused a mudflow.

• 泥でい流りゅうは谷たに沿ぞいの集しゅう落らくを襲おそった。

  The mudflow struck the settlements along the valley.