Study of Biological and Physico-Chemical Quality of Babolrood River in Mazandaran province, Iran

River in the southern Caspian Sea is an important and valuable habitat for migrating species and birth collect valuable fisheries. In the present study, to assess the quality of river water Babolrood river in the year 1389-1390 based on physic-chemical in River studies at some stations within so many sampling intervals with van veen grap and another system. Water quality monitoring is an important role in the sustainable management of river ecosystems. Changes influenced by human activities and land when and where the river is the border river. Overall assessment of water quality which, given the different standards for different usages of water is used, it is not easy. Water Quality Index (WQI) is simple and understandable as a tool for determining water quality and potential application is for managers and decision makers. Babolrood River in northern Iran, one of the major rivers of the aquaculture and agriculture due to urban and industrial development in recent years has suffered a loss of quality. In this study, sampling and analysis of quantitative and qualitative indicators Babolrood river water quality, water quality was investigated. Sampled during the year was performed and the parameters of temperature, pH, NO--, NH3, Ca++, Mg++, SO4--, CL-, NO3-, PO4-, HCO3-, K+, CO3-- and Na+ monthly and heavy metals, suspended water were measured on a seasonal basis. The results showed that the average values of dissolved oxygen, BOD5 and COD are significant differences between months and between different stations (T<0.05). Parameters in the cold season with a better quality have increased river flow. PH, turbidity, TSS and TDS showed no significant differences among the different stations and between the months of the year have been significant (T<0.05). In the study of water quality using different indices used by most stations in poor condition and have been averaged. NSSWQI index and topical index, because the number of parameters and impact parameters weight factor swelling surgical results are presented. Is merit in maintaining the survival of aquatic ecosystems, rivers and uses the laws governing the operation of their water, while complying with international standards, should be taken into consideration and properly implemented to also benefit from a variety of applications, the life of ecosystems to be maintained.