Hydrology and Suitability of Ground Water in Samawa for the Different Purposes

Study area lies between (44 00 - -44 41) longitude (30 18 - -30 40 ) latitude. It is lies south-west to AL_Muthana. The area is about 140 km 2 . Its boundary from the south is Saudi, from North is Euphrates river, from East is Besia, and from West is Shbicha. The geological formations in study area are: Russformation, Dammam formation (Tertiary deposits)-Quaternary deposits, and they are belongs to Eocen_Paleocen. The study area belong to stable shelf of the Nubio- Arabian plat form and the regional bedding strike is trending NW-SE direction and the dip amount is 2-3 toward NE. The study area is considers as a part of western desertof Iraq. Therefore it depends on ground water for many purposes such as: drinking-agriculture and others activities. The ground water movement from recharge area in SW outside the Iraqi border towards the discharge area along Euphrates river and the main sources of recharge is the rain and infiltration of water across the valleys. Climate of study area is arid; monthly average of rainfall (8 mm), temperature (25 °C), Humidity (44%) evaporation (318 mm) and sunshine (8.8 H/D). Therefore the area depends on ground water which consider the main source of waterthat used in the different purposeslike: industrial domestic, drinking and agriculture. According to analysis of parameters (EC, PH, T.D.S), and chemical analysis: (Na, K, Ca, Mg, Cl, SO 4 , HCO 3 ) ground water is unsuitable for drinking and industrial, but suitable-unsuitable for irrigation.