Short-Term Forecasting for Water Level of a Flood by Radar Hyetometer

Abstract

Recently, weather radar has been fully utilized and detailed real-time information over a wide range of area has become obtainable with hight time-space resolution. But the accuracy of the radar hyetometer is not always high enough to use for flood forecasting.
In this paper, a forecasting method by using radar data is proposed, in which, a radar constant is included in the system parameters and identified together by Kalman filtering. The application of this method to the Onga river basin shows that the forecasting of water satges by using radar data is possible with the same accuracy of that by rainfall data on the ground.