Investigating Hydraulic Properties of Aquifers in Duhok Governorate, Kurdistan Region, Iraq

The properties of the aquifer that influence well performance are depth, aerial extent, number of water-bearing formations that the well penetrated through, and the hydraulic properties of the aquifer that allow water to flow through the aquifer must typically be established. The transmissivity and hydraulic conductivity are important factors. Pumping test data were carried out for 40 drilled boreholes (including observation and monitoring wells) at different locations to determine the groundwater flow direction and hydraulic properties of the aquifers in the Duhok area. The depths of the wells range from 70 to 265 m with an average of 171 m while well discharge ranged from 3.0 to 17 l/s with an average of 7.0 l/s. The results of the analysis reveal that the value of hydraulic conductivity varies from 1.25E-6 m/sec to 1.2E-3 m/sec with an average of 1.02E-4 m/sec, and the transmissivity varies from 1.82E-4 to 4.37E-2 m2/sec with an average of 8.75*10-3 m2/sec. Specific yield ranges between 0.11 to 3.29 percent with an average of 1.06 percent. Maps of the Duhok aquifer's piezometric surface, hydraulic conductivity, specific yield, and transmissivity have been created. These can be employed in the area's planning, site selection, and well drilling procedures.