Flash flood warning system in risky area

This paper proposes a system that can early warn about the upcoming flash flood and also landslide for the upstream and downstream areas. The system uses solar cells together with batteries as the main power and can be split into two parts. The first part is the transmitter installed at the upstream and composes of a data logger, a water level meter with two sensors, a rain gauge, a processing unit with an SMS (Short Message Service) transmitter and a warning siren. The second is the receiver installed at the downstream and composes of an SMS receiver with a warning siren as well. The system can warn the upstream village immediately and then warn the downstream area about 2 hours in advance. The warning alarm takes place when the runoff level, the rainfall in 1 hour, or the rainfall in 1 day or in 3 days, over critical points, and if the groundwater level also exceeds a critical point, the warning will show that a landslide may happen as well.