noun
soil runoff; soil erosion
Technical and environmental term referring to the washing away of topsoil by water or wind.
大雨による土壌流出が農地に被害を与えた。
Soil runoff caused by heavy rain damaged the farmland.
森林伐採は土壌流出の原因となる。
Deforestation causes soil erosion.
土壌浸食 (soil erosion) emphasizes the gradual wearing away process, while 土壌流出 focuses on the actual washing away or runoff of soil.
Compound of 土壌 (soil) and 流出 (outflow, runoff).