Reference
WaReg regulates the water flow at Björkaån
There was a need to regulate the water flow from Björkaån to downstream farmland. The water intake has previously been regulated with wooden dams via manual power to the farmland at Björkaån, but this is now to be done automatically instead.
The water flow in Björkaån (catchment area approx. 335 km2) varies from lowest flows of just under 50 liters per second to high flows of over 50 m3/s. The average flow (MQ) is 4 m3/s.
The purpose of this facility is, among other things, to restore a culturally and historically interesting facility that can also function as a water purifier and where environments are important for displaced plant and animal species to be able to be recreated.
Of particular interest is creating play environments for the endangered shore toad.
The solution
We at Wapro solved this by installing two WaReg DN400s set to 250 l/s, whose main function is to restrict the inflow to the main canal at high flows. At high flows, the water level can rise approximately 1.5 meters compared to low flows. WaReg regulates the inflow to the main canal and side canals automatically at high flows in Björkaån. This means that the main canal and side canals are not damaged.
Normally, the system does not need to be supplied with more water than a couple of hundred liters per second. The solution with WaReg also means that the inlet can easily be closed completely if necessary, e.g. in connection with mowing when the fields will support agricultural machinery.
