Over time, though, silt and leaves had clogged the drain.
但是，时间久了，淤泥和树叶就会阻塞下水道。
2
If it's mostly silt and clay, it will benefit from the addition of washed sand to help it drain and aerate well.
如果我们考虑的主要是泥沙和粘土，将有利于从另外的水洗砂，以帮助它流失和通气良好。
3
Through the comparison of the construction schemes the dewatering with open drain, replacement and dynamic compaction are used for the treatment of saturated silt ground under groundwater.