Abstract
The most secure method in providing water in the dry and semi-dry regions is the use of underground water sources and due to over consumption of water aquifers capacities, most of fields and specially Imamzadeh Jafar are faced with negative performance and balance, which threatens the land subsiding. The plateau with the annual raining of 438 millimeters has 169 deep and semi-deep wells with annual 36.68 million consumption and this issue has increased the research signification, in order to protect and relive the required water aquifers, there is a need to predict the underground water level accurately in different condition. In this research, by the use of balance equation and modflow software in Imamzadeh Jafar, water aquifer was analyzed within seven scenario. The underground water level evaluation for the short run periods for 2 years and middle term of 4 years and 12 years of long term was performed; and the results showed that the performance and balance of the plateau was increased due to increase of water consumption compared to the water aquifer quantity in the region that was negative. To the point that the 1, 3, 4, 5, 7 scenarios (minimum 0.17 and maximum -11.34) and 2, 6 scenarios in different timely periods show that the underground water saving volume is positive (minimum 3.64 and maximum 19.83).
Highlights
Iran is the land with semi dry climate and the average rainfall of 240 millimeter is equal to or even less than one third of average rainfall in the world, and from the other hand, the Iran annual evaporation rate is three times more than other part of earth [1]
[2] evaluated the artificial feeding effect on the sweat water displacement in Tasuj field by the use of underground water mathematical model, GIS system, and evaluation of region water balance, they concluded that the artificial feeding plan and flood distribution in the underground water have suitable influence. [3] simulated aquifer of Jahrom field in order to evaluate different operational options by the use of modflow numerical model and in addition to measure two parameters of hydraulic directing and saving coefficient and the output model evaluation, the aquifer stationary drop is assumed definitely in the future 10 years that the main reason in the drought period is the increase of water consumption rate from the operating wells and lack of wells territory obtaining
The result of modflow model calibration included the 98% coefficient and different volumes of hydraulic coefficient and the special watering was obtained 0.26 and 0.031 and after the calibration analysis results evaluation, the model sensitivity is identified that the made model had more sensitivity compared to tow other parameters to evaluate the model accuracy, the timely period between 2012 to 2014 has been considered
Summary
Iran is the land with semi dry climate and the average rainfall of 240 millimeter is equal to or even less than one third of average rainfall in the world, and from the other hand, the Iran annual evaporation rate is three times more than other part of earth [1] In such condition, in order to response to water inquires and avoid negative performance and balance of aquifer, we should define and operate the aquifer water projects at national level. Lotfie and Mehrdad (2012) in their research by title of pumping parameters evaluation, feeding and evaporation and perspiration of water from the underground water level evaluated the conditions in Orumieh by the use of modeflow software and in this model the 38 wells water lever piezometer was used that evaporation parameters and pumping from operating wells and feeding of under evaluation and sensitivity was considered and the feeding parameter is recognized as the most effective factor in the underground water level and it was put in the second rate of pumping that evaporation and perspiration had the fewest effect and the results showed that by supplying the agricultural wells proper management and reducing the pumping in received water from the climate raining and directing them to the position that feeding could be used in the water level increasing. [6] performed a research by title of future condition prediction in Hashem well aquifer and by use of modflow software to realize the future condition of aquifer and proceeded to simulate the aquifer by the use of modflow software that the results in this research the agricultural well pumping parameters and hydraulic directing were considered as the most effective parameters in the aquifer model
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