A NEW ESTIMATION METHOD OF INFLOW INTO DAM RESERVOIR USING DIGITAL FILTER

Abstract

Amount of water inflow into a dam reservoir is estimated from the increment of hydrostatic water level in the constant time intervals. The data of water inflow is important for efficient dam operation. Therefore, the measurement of hydrostatic water level with high accuracy is important work to know the exact amount of water inflow. However, the data of water level is disturbed by the signals of wind wave, seiche and so on. The estimation method of hydrostatic water level is demanded from a dam administrator. This paper proposes the new estimation method of hydrostatic water level using IIR digital filter, and the effect of this filter is discussed. It is confirmed that the water inflow can be estimated using the new method. And the accuracy of estimation is discussed by investigating the variance of filter output.