Paper Title
Correlation and Linear Regression Model Between BOD and COD in ARAC Stream in Turkey

Abstract
Water quality parameter research or experiment are very expensive and very hard analyses for river or stream. In addition to that, many expert staff are necessary to be able to make these analyses. For this reason, prediction method is used in generally. Estimating some analytic parameters allows the decision makers to quick access the data that they need. To decide something in someposition as soon as possible. Moreover the cost of the data is reduced by using estimation method. Araç stream analyzed for BOD, COD and Temp. these data were determined by making experiment near the stream. These experiments were done by expert from DSİ between 2011 and 2014 for selected months. In this paper survey, firstly outlier detection was done to get rid of fault experiment result, than correlation coefficient and regression model were calculated and finally, MSE was checked to support these idea Key words - BOD, COD, correlation, regression, MSE