ph.
1. The old harbor is now all silted up.
旧港现在已完全被淤泥堵塞了。
1. 淤泥充塞：silo 筒仓 | silt up 淤泥充塞 | silt 淤泥
2. 淤塞：silo 粮仓 | silt up 淤塞 | silt arrester 拦砂坝
3. 被淤泥阻塞：watershed 流域 | silt up 被淤泥阻塞 | terrain 地域,地带
1. (使)(河流、湖泊)淤塞
If a river or lake silts up or something silts it up, it becomes blocked with silt.
e.g. Without huge investment the reservoirs will silt up...
如果没有巨额投资的话，水库肯定会淤塞。
e.g. The soil washed from the hills is silting up the hydroelectric dams.
从山上冲刷下来的泥土就要让水电大坝淤塞了。