TECHNOLOGY

The StormHarvester technology links civil infrastructure such as valves, pumps and floodgates to a highly accurate short to medium term rainfall runoff prediction algorithm.


StormHarvester Control Centre


The StormHarvester control centre receives site specific rainfall predictions from various sources including the British Met office. The controller runs this data through an algorithm estimating the likely runoff volume for the upcoming rain events. The site controller then automatically takes action to ensure civil infrastructure is adequately prepared to deal with the predicted runoff.


StormHarvester Controller


The StormHarvester controller receives communication links from the control centre at regular intervals. The controller is instructed of the current safe level of the reservoir, tank or pumping chamber. The system then takes action to lower water levels, if required, by temporarily opening a valve, flood gate or activating a set of pumps.

Fail-Safe System

The patented fail-safe system built into all StormHarvester technology is independently tested and regulator approved. The controller carries out an automated “System Handshake” with the control centre at agreed intervals. If the communication link is not made or any other issue is detected on the site such as a pipe blockage the system will automatically default to storm attenuation only at pre-programmed green field rates. The system will then issue SMS warning messages to the control centre and site operators.
Both the valves and the site controller has a built in battery backup pack to allow the system to continue working in the event of power failure.

Rainwater Harvesting and Storm Attenuation

When acting to combine rainwater harvesting and storm attenuation the StormHarvester system only controls the portion of attenuation for the roof runoff. As this is typically around half the overall attenuation and the second half of attenuation tanks are typical only engaged for rainfall events above a 1:2 year classification the StormHarvester system is only required to detect rainfall events categorised above 1:2 year to match the flood prevention performance of standard attenuation structures. Typically attenuation tanks will drain fully at greenfield rates in between 6-12 hours. The StormHarvester system is therefore only required to detect a 1:2 year storm event at 12 hours’ notice to match the performance of a typical attenuation tank. 3 years of theoretical and practical testing have proven StormHarvester’s ability to achieve this beyond any doubt.