Abstract
As load of storm weather flow in small rivers differs from load of dry weather flow in their total amount and components, their weights in total' load of all weather days must be made clear. For small rivers incoming to Lake Biwa, cumulative loads under a storm weather flow differ from daily load of dry weather flow in their quantities and qualities, on many various rain events. Because of the heavier weight of load for storm weather flow, reexamination of runoff rate of load is essential based on data of both of storm and dry weather flows. Especially, runoff of sediment in river bed among preceding dry weather days and erosion of slopes and naked lands in river basin brings out load of suspended matter and components of total water quality items in large quantities by heavy storm. Also, excepting the influences of scale of river basin area, the relation between specific cumulative load and specific cumulative flow under storm weather condition was approximately expressed as an expornential function for application to other various rivers.
