Rainfall Hydrograph

Product Description

Rainfall Hydrograph:

This apparatus sets out to demonstrate, on a small-scale, some of the physical processes found in hydrology. These fall into two related categories: the relationship between rainfall and runoff from catchment areas of variable permeability and the abstraction of ground water by wells, with or without surface recharge from rainfall. Thus it is concerned with that part of the hydrological cycle bounded by the arrival of 'net rainfall' on the ground surface and the catchment runoff by surface streams.

Specification of  Rainfall Hydrograph :

• A unit designed to obtain catchment rainfall and runoff values as functions of time.
• Comprising a bench- or floor-standing tank with two overhead square pattern spray nozzles supplying water via a flow control valve, flow meter and solenoid valve.
• A motor-driven traversing vessel with 17 compartments is moved by timer beneath the outlet at a preselected rate to collect the runoff and provide an immediate display of the hydrograph.
  
• The tank is 1.2m long x 0.8m wide x 0.2m deep.
• The flow range is 0.4-4.4 l/min.

• Storm hydrograph from single or multiple storms.
• Storm hydrograph from a previously saturated catchment.
• Storm runoff from an impermeable catchment.
• Effect of a moving storm on flood hydrograph.
• Effect of reservoir storage on flood hydrograph.
• Effect of land drains on flood hydrograph.