backwater silting

例句：

1. 1. The backwater of the river is a popular spot for fishing.
   这条河的回水区是钓鱼的好地方。
2. 2. The backwater silt has been causing problems for the local ecosystem.
   回水区的淤积物给当地生态系统带来了问题。
3. 3. To prevent backwater silt from accumulating, the city has implemented stricter waste management policies.
   为了防止回水区淤积物积累，城市实施了更严格的垃圾管理政策。