The water‐supply system in the margin of Dasht‐e‐Kawir (central Iran)

The Dasht‐e‐Kawir in central Iran is a catchment, which includes saline, swampy areas and sandy land.

The system of water supply in the margins of the Dasht‐e‐Kawir is limited by the amount of underground water which can be extracted by qanats and wells.

Six kinds of qanats and two kinds of shallow wells have been recognized in the region.

A qanat is usually produced in six stages, of which measurement of the gradient is the most crucial for its successful construction. Thus, the construction of thirty qanats in the margin of Dasht‐e‐Kawir has been studied to determine the logical relationship between (a) the gradient, (b) the depth of main well, (c) the length and (d) the discharge of the qanat.