Rainfall Hydrograph

Hydrograph is an important tool for the representation of hydrological data such as precipitation, groundwater levels or discharges. The trainer includes a tank with a sand filling, which is flowed through by water.

The water is supplied to the tank via a precipitation device with two nozzles that can be adjusted separately via valves. To study different drainages, the water is drained either via a drainage pipe or a drain chamber, which is separated from the experimental section by a screen. The draining water is distributed over 17 transparent chambers. This creates a profile over time of the water drain.

Experiments:

• Effect of precipitation of varying duration or intensity on soils with different saturation

• Record hydrographs after precipitation

• Storage capacity of soils with different saturation

• Compare natural dewatering with dewatering via  drainage pipe

• Influence of rainwater retention basin on the hydrograph