Miscellaneous

Generally, for measurement of infiltration on the field we use the Cylindrical Infiltrometer of diameter 30 cm and 60 cm. Basic infiltration rate for a different type of soil are as below:

1. If the infiltration rate is 1-5 mm/hour that it is Clay.
2. If the infiltration rate is 5-10 mm/hour that it is Clay Loam.
3. If the infiltration rate is 10-20 mm/hour that it is Loam.
4. If the infiltration rate is 20-30 mm/hour that it is Sandy Loam.
5. If the infiltration rate is greater than 30 mm/hour that it is Sand.

The following ways can help to remove or control silt at head work.

1. By installing silt excluder you can control or remove silt easily.

2. Provide a divide wall at the side of canal in river to create trap or pocket for controlling silt.

3. By making smooth flow we should have to avoid unsteady flow of water.

4. By handling carefully of regulation of weir.