In the design of sand basin, the first problem is to select the calculation method of suspended silt deposition rate.

The disasters due to silt deposition took place in the lake area and mainly expressed in flooding, soil gleization and snail fever.

Mawei harbor is located at the Minjiang estuary. Owing to severe silt deposition, the water depth decreased from 8.2m to 1.5m in the past few years.