抄録
Thus far the pollution of closed waters has been pointed out all over the world. In this study, especially, the changing volumes of chlorophyll a and phosphate-phosphorus (PO4) 3- were examined with the observation of both sunlight UV-rays volume and water temperature in the reservoirs. And constructed simple water quality estimation model on the basis of the observation data was tried, and the closed water environment viewed from sunlight UV-rays by using this model was estimated. As a result, it has turned out that we could obtain the related equation, viz., Dλ=Dα on the assumption that a related equation, viz., Dλ=DαDβDγ (where, D: elapsed time, λE: quantity of chlorophyll a, α: UV-rays volume, β: water temperature, γ: quantity of (PO4) 3-) would be applicable. It is therefore considered that the specific characteristic of closed water environment such as a lake, a marsh or a reservoir etc. could be decided from the coefficient of observation value.
