Hydraulic characteristics of the groundwater aquifer in Al-Dhibaei Area South Tikrit

Abstract

In this study the ground water recharge was estimated, with studying the hydrological conditions Al-Dhubaei region which located 5 km to the southwest of Tikrit city. Depending on the data of Tikrit meteorological station, the averages monthly climatic elements (rainfall, temperature and evaporation) were studied for a period of (1989-2013), the average annual rainfall reached 166.72 mm, as well as the evaporation-transpiration rates were calculated using Thornthwait method. The water balance of the area was calculated and the results show that the ratio of water surplus were reached to 38.87% of the total annual rainfall, and the groundwater recharge equal to 4.66×10⁶ m³/year.

Also, the hydrogeological study of the region show that the main bearing formations of groundwater represented by Injana formation and Quaternary deposits, which are Confined Aquifers, the hydraulic properties were studied, and  pumping test data show that the Transmissibility (T) ranged between (55.3 to 1140.48) m²/day, while the Hydraulic Conductivity (K) ranged between (0.58 to 43.38) m/day. The ground water table map and flow net were drawn, and show that the flow in northwest of the study area takes two trends, to the northeast and to the northwest, but in the middle and south of the area the flow was to the southeast.