Drainage and Dewatering | Building Construction

Introduction to Drainage and Dewatering

In this article, we will discuss and classify drainage and dewatering in brief.

What is drainage?

As the name itself suggests, drainage is the process in which the free water is removed with the help of gravity in order to maintain stable soil conditions.

Drainage can be classified into two categories:

  1. Surface drainage
  2. Sub-surface drainage

What is Surface drainage?

The water that runs on the surface of the ground is collected and or diverted into a water body.

Sub-surface drainage

It is the collection and disposal of ground water. It is also called as dewatering.

What is dewatering?

The process in which the water is removed from a foundation pit;

  • when it is situated below the ground water table or
  • when it is surrounded by a coffer dam.