One of the most important works for decision makers is to decrease the bed environmental effect off human beings. For that reason, the regional environmental data is necessary to find a solution for environmental problems. The planners have to use some useful programs, methods or mathematical approach to calculate or estimate the pollution amount in the environment. The rivers are water sources for the small living areas. Moreover, the small rivers are also disposal sites for dischargers of sewage water. Therefore, the studies about river pollution are needed for the future plan of most of the regional development areas. River pollution is considered as one of the most important environmental pollution problem due to inverse effects in all river basins. Therefore, to control water quality, river pollution parameters are analyzed to represent the river situation. This is very expensive, consumes too much time and needs deep analysis. For that reason, a mathematical approach was used for the estimation of pollution level. There isn’t any other work about Araç River in Karabük province of Turkey. In this study, Araç river was analyzed by statistical and mathematical methods. The time series of the Biological Oxygen Demand (BOD) was studied. In first step, sewage system and waste water amount data were gathered from administrative registrations and then analyzed. The population data are correlated with waste water amount. Finally, total BOD values in sewage water were predicted which is disposed to Araç River. Other water pollution parameters should be also predicted and studied by this method.
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