International Irrigation Center
There are four objective functions available to date (11/86), these include 1) maximimize total regional groundwater withdrawl. 2) minimize total coat of satisfying regional needs. and 3) maximize the sum of selected local withdrawls. and 4) maximize the present value of total net economic return.
Peralta, R.C., Killian, P.J., Yazdanian, A. and V. Kumar. 1989. SSTAR Users Manual. International Irrigation Center Report, IIC-89/3. 40 p.