Environmental Systems Research

Table 2 Comparison of typical Qanats and deep wells in Iran

From: Qanat water supply systems: a revisit of sustainability perspectives

Technology	Power need^a	Water withdrawal cost^b
Technology	Power need^a	Interest rate = 10%	Interest rate = 15%	Interest rate = 20%
Qanat	–	41.2	56.3	71.5
Diesel deep well	4.24	89.6	103.7	118.9
Electric deep well	2.60	67.5	88.8	111.4

^aHorse power (Hp) for extracting 1 liter of water per second.
^b1,000 Rials per 1 cubic meter of water.

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