Simulation of Marvdasht Groundwater Level and Investigation of Forecast Scenarios Using MODFLOW Mathematical Code

Abstract

Irregular abstraction of groundwater aquifers in the country has caused a sharp decline in the aquifer water level and the destruction of aquatic aquifers. In this study, in order to investigate the groundwater level of Marvdasht-Kharameh aquifer, located in Fars province, in relation to the uncontrolled abstraction of groundwater from the data of 81 piezometric wells in the period (2018-2018), the Modflow model was simulated. Also, the results of calculating the water balance of 7,500 wells in the basin indicate that the amount of 1100 million cubic meters of water from the aquifer constant storage has been reduced over a period of 10 years. According to the prepared interpolation maps, the highest rate of groundwater loss has occurred in Dorodzan, Ramjerd and Shool areas. Therefore, it is in line with the statistics of the Fars Regional Water Organization that there are wells with high discharge in these areas. According to the maps prepared from Marvdasht aquifer, due to the alluvial nature of the groundwater aquifer, the effect of water level drop can be observed from a short distance. On the other hand, in the intermediate maps, the coefficient of hydraulic conductivity parameter indicates that the rate of aquifer drop in the northwest, center and southeast of the basin has the highest value, which is appropriate with 11% relative error confirms modeling. Finally, by performing two scenarios of 10 and 30% reduction,