Diurnal Changes of Dissolved Oxygen and Water Temperature of the River

Abstract

At Daiichi Dam of the Tachiyazawa River, the amount of dissolved oxygen and the water temperature are observed throughout the day. The hourly observation reveals that the linear relationship (negative correlation) is found to exist between the two. Regarding this river, the following equation is obtained:
DO=13, 98-0.367 Tw (r=-0.933),
where DO is dissolved oxygen in ppm and Tw in °C.