Karoun River is one of the most important water ways and longest rivers of Iran. Because ofagricultural farms, industrial units and cities in its vicinity, the Karoun River has a strategical position.Hence, its water quality monitoring is essential due to many point and
More
Karoun River is one of the most important water ways and longest rivers of Iran. Because ofagricultural farms, industrial units and cities in its vicinity, the Karoun River has a strategical position.Hence, its water quality monitoring is essential due to many point and non point sources of pollution.This study was carried out to evaluate Karoun River’s water quality in Ahvaz region.For water quality data's analysis in various stations, index of water quality NSF (National SanitationFoundation) software from Wilkes University is used. Therefore Dissolved Oxygen, fecal coliform,pH, BOD5, Nitrate, Phosphate, Temperature, Turbidity and Total solids were determined on monthlybasis.The monthly WQI in studied stations fluctuates from 57 to 70 that fall within medium category. Waterquality index from first to last station gradually decreased. The results of WQINSF for river bankwater quality computation during 1 year sampling period show that Koot-Abdollah station (lower partof the river) has the worst situation with yearly index of 62.5 and Kian-Abad station (upper section ofthe river) has the best quality amongst studied stations (65.25).Because of river bed and self purification, seasonal change has insignificant effects on water quality inPol-e-Siah station. Water quality (in spring) because of the suitable conditions for growth of fecalcoliforms and increased turbidity- has worst situation and in autumn season -because of theincensement of rain and decreasing of contaminations- has best situation.
Manuscript profile
