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Types of Drainage

1. Surface drainage
2. Sub-surface drainage

Surface Drainage:

Process of removing the excess water from the land surface is known as surface drainage.

Sub- surface Drainage:

If the excess of water does saturate the pore space of the soil, the process of its removal by down ward flow through the soil is known as Sub-surface drainage or Internal Drainage.

There are two type of Sub-surface Drainage:

1) Horizontal Drainage
2) Vertical Drainage

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