Tanka is a technique to collect rainwater by making tanks (tanka). A pit is dug in the courtyard and it is made pucca. The tanka is kept covered with a lid. The roof of the house is made sloping so that the rainwater collected here flows through a pipe into the tanka. A sieve is attached to the mouth of the pipe so that no dirt goes into the tanka. This water is used for drinking after it is cleaned.

Further Reading:

• Geography Notes
• Water – A Resource