天ケ瀬貯水池の濁水に関する調査研究

Abstract

This paper treats the turbidity problem and the sedimentation in Amagase Reservoir. Inorder to catch the characters of these phenomena we took up observing the concentration of turbidity, the water temperature and the sedimentation rate in Amagase Reservoir in May 1973.It is clarified from these observed results and other data that the turbidity in the reservoir usclosely relatied to the transport rate of wash load in Daido River. By using the calculated transportrate of wash load in Daido River as the boundary condition, the turbidity concentration in thereservoir is analyzed by means of the mass conservation equation which includes the effect of particleswith fall-velocity. The calculated results in some cases of flood are in good agreement with theobserved values as a whole. As for the detailed parts, however, we leave room for investigatingthem.