Scholarly record

QUANTITY AND QUALITY STUDIES FOR CONTAMINATED UNDERGROUND WATER IN ABHAR PLAIN (NW OF IRAN)

H. Moghimi

Abstract

The studied area is 1960 km2 and located in Zanjan province and is placed between 48Вє, 48Вґ to 49Вє, 30Вґ east longitude and 35 Вє, 57Вґ to 36Вє, 36Вґnorth latitude. Human pollutants are mainly home and human sewage which is discharged by absorbent wells that seems to be one of the best ways of discharging sewage. On the other hand in the places where the underground water recharge the river, there is a possibility of having some environmental problems in the nearly future.Presently, the amounts of BOD5 and COD are due to the rapid growth in population, farm lands and industrial sites. From the bacteriological point of view, Abhar Roud River is highly contaminated. Underground water sources from recharge to discharge area are naturally made up of Carbonate, Bicarbonate, Sulphate and chloride. Although sulphate type is more found near the recharge place, but there are no evaporative layers and in all probability, this change has been made as a result of discharge urban and factory sewage by absorbent wells. Necessary from the bacteriological point of view, no pollution has been reported from the wells in Abhar plain. But with due attention to the critical point, growth in population, in parallel with using more farm lands and different kinds of chemical fertilizers and the growth in the number of industrial sites, it is believed that in the nearly future, under ground water of Abhar plain would be polluted, too.

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