... Journal of Water and Environment Technology, Vol. 6, No.2, 2008 - 93 - Frequency of Routine and Flooding-stage Observations for Precise Annual Total Pollutant Loads and their Estimating Method ... tributaries and an annual mean flow of 268m3/s, flows out of Lake Biwa, runs through the Amagase Dam and flows into Osaka Bay. Point and non-point pollutant loads in Kyoto City and its adjacent ... pollutants in the Yodo River and their runoff characteristics (Ebise et al. (2001, 2003, 2004 and 2006)). Here, pollutants contain organic matter, nutrients, SS and other measured substances....