Analysis of Geological and Hydrological Characteristics of Surface and Groundwater Reservoirs in the Water Basin of Ibb City and their Hydrogeological Implications

Abstract

This study sought to analyze the geological characteristics (lithological and structures), spatial and thickness dimensions, hydrological and hydraulic properties for each one of the following: rock correlation schemes, and hydrological scheme for sectors of drilling wells in Ibb City, as well as the hydrogeological scheme for reservoirs. The study was based on the descriptive approach to describe those characteristics, schemes and interpretations. The study concluded that there was a clear influence for the type of rocky strata in terms of its lithological characteristics on the hydrological and hydrological characteristics of rocks that  related to the movement and transfer of water, and the productivity of wells.  Furthermore, it was found that the groundwater reservoir of Ibb City was composed of: the incompact sedimentary reservoir, and the basalt groundwater reservoir (cracked and solid). The greater thickness of the cracked basalt reservoir was 110 meters in the south-east of Ibb City, and its hydrological properties were good with high productivity. From hydro-geological point of view,  this reservoir was able to store and give water. It was noticed that the biggest thickness of the solid basalt reservoir was (323) meters in the far north-west of Ibb City, and lowest thickness of this reservoir was (147) meters in the south-east of the city with weak hydrological properties. From hydro-geological point of view, this reservoir had a weak productivity due to its solid permeability rocks which were unable to store and give water, except areas that contained connected cracks or faults; which made its high productivity.