alluvia

The sandy soil that upland lime calcium pledges earth and fluvial two sides reach alluvion, sandy loam 4 kinds big.

丘陵石灰钙质土和河流两岸及沙洲的沙土、沙壤土等四大。

There are vast non-consolidated alluvia deposits freshly formed in estuary area of Yangtze River and nearby coastal area.The deposits contribute to land subsidence.

长江河口滨海地区广泛分布有大量的填土，由于其形成时间短，具有欠固结特，对地面沉降影响较大。