How agricultural drainage works – Know the Complete Procedure

agricultural drainage

You will find two main types when it comes to the agriculture system. One is surface drainage while the other one is sub-surface drainage.


Surface Drainage System

When there is excess irrigation or there is huge rainfall, you can depend on a regular irrigation drainage system.

The land surfaces can be divided into

  1. Bedded System which uses for the flat lands
  2. Graded System that is used for sloping the lands.


Sub-surface Drainage System

The subsurface drainage system can be differentiated from the subsurface field system. The subsurface drainage system is concerned about removing water that is included in the underlying subgrade. Usually, this water is the result of exceptionally wet weather or from the high water table.

The subsurface drainage system has four different types. These are –

  1. Interceptor Drains
  2. Mole Drainage
  3. Ground Water Pumps
  4. PVC and Corrugated Pipes

You will get lots of benefits from the subsurface drainage system. For instance:-

  1. It improves the soil health since it increases the aeration of the soil
  2. Subsurface irrigation system increases the response of fertilizer
  3. In plants and soil as well, this reduces the imbalance of mineral
  4. In the early stage this reduces or prevents salinity.


Once the subsurface pipes are installed for the drainage system this strategically removes water from the isolated wet areas to drain the entire field.

You may want to know where the drainage system is needed and why. Let’s discuss them in detail here.

Soil that needs drainage

Most of the soil around the world has poor internal drainage. And without any artificial drainage, it would remain waterlogged for several days after excess rain.

And the prolonged wet prevents timely fieldwork plus the stresses of growing crops. Soil condition makes the drainage necessary for slow water permeability which restricts water movement. It improves the depressional topography. Also, it gives high salt levels to the soil surface.

Communicating water amounts

All through this website page and in like manner practice, water amounts are communicated in units of profundity inches or centimeters rather than units of volume. So, for instance, “a dirt holds three creeps of plant accessible water,” or “one inch of water was depleted from the dirt.”

Soil dampness variety

Soil dampness varies between the water table. While the agronomic terms “field limit” and “shriveling point” depict helpful agronomic reference focuses, soil dampness in the field is continually changing with time and shifts all through the dirt profile (the dirt between the ground surface and a specific profundity).

Dampness content: Field limit and withering

When dirt is adequately wet, its slender powers can hold no more water, and the dirt is at the field limit. The real soil dampness content at the field limit fluctuates with the soil surface, regularly going from 15 to 45 percent by volume. Therefore, plants can undoubtedly separate water from dirt when its dampness is at or close to the handle limit.


The extent of the dirt volume that is pore space relies upon soil surface and design, yet ordinarily differs between 35 and 55 percent. More vulnerable fine powers hold water in the dirt pores, while more grounded adsorptive powers have water as a film that encompasses soil particles.