Long Term Simulation of Shazand Plain Aquifer under Changing Resources and Applications




Iran is among the world’s arid and semi-arid regions and its demand for water has been increased due to
population growth, urbanization and the development the economic sectors (industrial and agricultural). In
many of these regions, the lack of planning and the unauthorized use of resources have led to excessive
exploitation and a lower level of groundwater. The usable groundwater for the country water supply is about
55 percent. Research has been carried out for modeling the Shazand groundwater, which is located in
Markazi Province. Modeling has been carrying out using Visual Modflow software. In recent years Shazand
aquifer groundwater levels have dropped significantly. Groundwater level during 8 years (1998-2006) was
0.84 m and the annual average 0.105 m has also fallen. Population, urbanization and increasing migration in
this region have resulted in higher demand for water which its only solution is inevitably limited
consumption in the agriculture sector through efficiency improvement. The model execution results for these
two options reveal that efficiency improvement will increase the basin hydrograph about 3.4m during an 8
year period with 0.42 m annual average. Increasing population trends during a 10 year period have resulted
in 2.5m reduction in the water table level with annual average of 0.23 m. According to planning horizon and
drinking water supply, final results indicate that the stability of aquifer resources without other
complementary resources depends on more limited agricultural usage through the improvement of efficiency
and irrigation methods.