gully and valley erosion

例句：

1. 1. The rapid flow of waterhas caused significant gully and valleyerosion in the area.
   水流的快速流动导致了该地区严重的山谷和河谷侵蚀。
2. 2. Theconstruction of a new road will greatly reducegully and valley erosion inthe region.
   修建一条新路将大大减少该地区的山谷和河谷侵蚀。
3. 3. The governmentis working on a plan to prevent gully and valley erosion by plantingmore trees.
   政府正在制定一项计划，通过种植更多树木来防止山谷和河谷侵蚀。