REGIONALIZATION AND MAPPING OF DISSOLVED OXYGEN CONCENTRATION OF SAKARYA BASIN BY L‒MOMENTS METHOD

In this study, a regionalization study was conducted with the L–Moments method in order to determine change of dissolved oxygen (DO) required sustain life aquatic organisms given return period and also consider effects all stations. Dissolved concentration data 20 meteorological stations for spring months were evaluated between 1995 2014 Sakarya Basin, Turkey. Firstly, Homogeneity Criterion (H1) statistical results have been determined that area is not uniformly homogeneous Basin (H1= 18.01 >> 1.0). implement L−Moments method, divided into five regions considering topographic characteristics basin. second phase method; Wakeby distribution proposed by Hosking parameters estimated. By using parameter values distribution, dimensionless DO content corresponding periodic repetition periods obtained. last stage study; 50, 100, 200, 500 1000 years repetitive thematic maps created Inverse distance weighted interpolation (IDW) aim visually expressing estimated method.