Studying the Environmental and Economical Effect of the Salty Water from

Because of the limited surface water resources man obligated to use fresh ground water, which is often has a lower quality than surface water. Mazandaran Valley, south of the Caspian Sea, has an area of about 18 000 square kilometer through which few rivers flow (with a total capacity of 40 MM square meter). The valley is filled with a newly alluvial sediments, in which a few aquifers are located. Many wells were drilled in this valley into the aquifers since 1961 and in a greater number in 1981 and thereafter to supply the required amount of water. Because of the closely location of the aquifers to the sea and because of a heavily pumping of the water from the area, it caused an early intrusion of salt water into the surface aquifer and therefore many wells changed to be salt water producer(with an EC of 20 000 micro mhos per centimeter). These wells became a problem for the nearby environment through contaminating the soil around them and therefore limiting any good cultivation of the land. The preliminary damage estimation of the soil specially the SHALTOOT RICE production from any well was 50 acres. The SHALTOOT is very delicate to the amount of salt in the water and therefore the salty water cause about 20 percent damage for any acre. Hence, there was about $ 14 000 economical lost from any well and a total o