Modeling the pond slope of Mono River with an equivalent electric scheme for flood forecasting in Nagbeto

The catchment area of the dam on Mono River in Nagbeto measures about 180 km 2 and counts among the small watersheds in the world. Forecasting in small watersheds (some hundreds of km 2 ) takes generally into account rainfall. That’s why a rainfallrunoff concept is adopted for the study. According to our observations, the feeling process in the basin of the dam on a river follows the same law as the recharging procedure of a capacitor fed by a direct input voltage. Hence, we look for a synoptic model where the hydraulic parameters of the pond slope of a river were translated into electric terms and the main laws in Electrotechnics as Ohm and Kirsshoff ones were verified. So, the runoff is similar to a current and the height to a voltage, etc. An equivalent electric scheme of the pond slope of a river was designed and the equation which governs the water flood is set up and solved. The simulation in Matlab of the solution to that equation which describes the behavior of the water flood in the pond slope gives a result which is satisfactory. The time constant τ of the RC equivalent electric scheme of the catchment area allows a flood forecasting with acceptable precision. The major difficulty of that mathematical rainfall-runoff modeling lies in determination of the hydraulic resistance of the catchment area. In the model the input is the maximal height of the water in the basin and the output is the time the water takes to reach that maximal height.