The resource of the dulcet water decreasing on our plant. Obstacles and problems that face water resources are the pollution and increasing of industrial wastes because of the human activities, lack of water resources in a place is considered dryness on well as unacceptable quality and quantity. The effect of outstretch and tide in estuaries of rivers increase the concentration of the salt in surface water. The city of Basra suffers from the lack of water discharge and high concentration of salt , wastewater, and the salt wedge ascending from downstream of Shat al – Arab river. The water decrease in quantities due to the decrease of water discharge in Shat al –Arab river from 1300 m3 /s to 1000 m3 /s . Now the water discharge reaches less than 40 m3 /s by the end of 2015. Shat al – Arab river suffers from the shortage of incoming water from rivers, which cause increase of salinity. Proposals are made for resolving some of the questions.