Civil Engineering - Irrigation - Discussion

The borrow pit should start from a distance not less than 5 m from the toe of the embankment in the case of small channels and 10 m from the toe in-case of large channels.

Inside borrow pit should have a width not more than half the width.

Borrow pits is also known as sand box

Borrow pits: When earthwork in filling exceeds the earthwork in excavation, the earth has to be brought from somewhere. The pits, which are dug for bringing earth, are known as borrow pits.

If such pits are excavated outside the channel, they are known as external borrow pits, and if they are excavated somewhere within the channel, they are known as internal borrow pits. It is a very costly affair to bring soil from distances. Even in the nearby areas, these pits may cause mosquito nuisance due to a collection of rain water in these pits, and hence, external borrow pits are not preferred.

Basic Concept Of Borrow Pits And It's Design Requirement.

Design Requirements:

The borrow pits should start from a point at a distance more than 5 m from the toe for small channels, and 10 m for large channels.

The width of these pits b should be less than half the width of the canal B, and should be dug in the entire.

The depth of these pits should be equal to or less than 1 m.

Longitudinally, these pits should not run continuous, but a minimum space of L/2 should be left between two consecutive pits, (where L is the length of one pits).

Good Explanation, Thanks @Omkar.

Thanks all.

Good explanation. Thanks all.

@Bhawana Dubey.

What is water table?

The level below which the ground is saturated with water.

The Water table, also called Groundwater Table, upper level of an underground surface in which the soil or rocks are permanently saturated with water. The water table separates the groundwater zone that lies below it from the capillary fringe, or zone of aeration, that lies above it.

What is water table?

Thanks @Omkar.

Good explanation. Thanks all.