alluvial silt

基本解释

The seabed here consisted of alluvial silt and mud deposits.
此地的海床由冲击到这里的细沙和沉积的淤泥构成。
It is a strip of alluvial silt about 80km (50 miles) long and 17km wide that is home to some 650,000 people.
崇明岛由泥沙冲积而成，呈长条形，长约80公里（50英里），宽约17公里，全岛有居民约6万5千人。
Silt sand was largely used in the roadbed of a main road locating in alluvial plain in Haikou City. This paper discusses the construction technical essentials of this silt sand roadbed.
海口某城市干道位于冲积平原地区，路基填筑用土大部分采用周边地区粉砂土，本文主要阐述粉砂土路基施工技术要点。