The hydrogeological map of the Sultanate shows the main aquifers in the various regions of the Sultanate, such as the alluvial reservoirs (the Quaternary era) in the Dhahirah, Al Batinah, Dakhiliyah and Eastern regions, and the triple era reservoirs (Al-Faris group in the north of Al-Musarat, the Umm Al-Ruduma aquifer in the Al-Najd region, the Adonib reservoir in the Salalah plain), Wadi Ronab and a depression in the central region. Which are considered as fresh water lenses above the salty regional groundwater.
The map also shows the method of classifying geological formations using colors and numbers for all rocks of the Sultanate into productive layers, semi-productive layers, and impermeable layers (non-water-producing). The map also contains contour lines for the water level of the aquifer of the Umm al-Radhumah layers (red color) and Fares layer (purple). The map also includes the most important locations of seawater desalination plants, springs, main aflaj, caves, main dams, protection areas for well fields, the direction of groundwater movement, and the direction of increasing salinity (orange)
The hydrogeological map also contains a cross-section of the lower geological formations and a depth of more than 3000 meters from sea level. The first line starts from the Al Batinah coast in the north to Adam in the south (line AB), while the second line starts from the coast of the Dahariz region in the Wilayat of Salalah to the Najd region (line CD). Establishing a hydrogeological database that includes collecting hydrogeological data for wells such as well identification number, coordinates, total depth of wells, water level, height above sea level, depth of refinery pipes, salinity rate, productivity, hydraulic characteristics of the aquifer, type of geological formation of the aquifer, and this database is linked to the geographic information system.
The hydrogeological map of the Sultanate is considered one of the important achievements that have been made in the water resources sector at the Ministry of Regional Municipalities and Water Resources. Many entities in the ministry and outside the ministry will benefit from this work. This project is considered a reference for future water studies of the Sultanate.