It is used to demonstrate the hydrological phenomena of rainfall. It shows the relationships between rainfall and the seepage of rainwater. A stainless steel tank filled with gravel acts as the ground. The water can be drained from the ground using a drainage tube or a filter. A time-controlled motorised water drain distributes the leakage water to 17 transparent measuring tanks. This allows a chronological profile of the discharge of water from the ground to be identified. The ground sample is irrigated by 2 nozzles that can be separately selected using ball valves. A solenoid valve releases the rain.
The quantity of rain is adjusted using a control valve and a flow meter. 3 electronic time switches control the irrigation time, the delay time and the measuring time. The unit includes an extra cleaning connection for cleaning the tubes. A tarpaulin is supplied for experiments including a non-permeable layer. Plastic containers that can be inserted in the tank act as rain storage reservoirs.
EXPERIMENTS
Investigation of the effect of rainfall of varying duration on soil of varying saturation
Hydrography of different types of irrigation
Hydrography of saturated or dry gravel
Investigations of water seepage
Investigation of capacity of soil to store water
Ground as a storage medium for water
Ground with a non-permeable layer
Comparison of natural and man-made drainage (tile drain)
Influence of sources on the flow of groundwater
Overflow of rain storage reservoirs
TECHNICAL DETAIL
Product & Code
Rainfall Hydrograph & AHH 04
Experimental tank
1200x600x200mm, suitable for ground samples up to max. 18.5cm layer thickness
