Using the USGS Modflow package and the UN Ground Water for Windows software, J. Karanjac simulated the ground water system of the Wadi Ham in Fujayrah Emirate of the United Arab Emirates in 1995 (the original model) and 1996 (The Sequel). The processes simulated include (a) natural recharge from rainfall, (b) increased recharge from flood water stored within the Wadi Ham reservoir ("artificial recharge"), (c) pumping from the Shaara well field and from agricultural developments along the coast, (d) variable transmissivity of the Quaternary aquifer dependent on the time-dependent saturated thickness, (e) constant heads in the sea, and (f) space-dependent storage properties.

The following was concluded from both phases of the simulation:

• The Wadi Ham ground water system appears to be very sensitive to (1) location of pumping site, (2) pumping rates and volumes from individual sites, and 93) conditions at the dam recharge site.
• The effect of the dam and its recharge reservoir is very beneficial. The Shaara well field depends on the artificial recharge from the dam reservoir. Without the recharge, the Shaara well field would have to reduce its annual pumping from 1.6 MCM to about 0.9 MCM.
• The sea water intrusion can only be effectively dealt with by reducing the exploitation from the coastal plain.