Throttling and metering the outflow from the Erlet stormwater basin

Reinhalteverband Mühltal & Region Böhmerwald

The Upper Austrian Reinhalteverband Mühltal & Region Böhmerwald comprises 24 municipalities and manages about 1,000 km of sewer, 18,000 sewer shafts, 300 pumping stations, 60 storm water basins and 5 sewage treatment plants. One of the storm water basins, the Erletbasin near Ulrichsberg, consists of two storagepipes each 30 m long and 2,000 mm in diameter.The pipes store the rainwater and retain it beforeit enters the main sewer towards the Ulrichsberg sewage treatment plant. The outflow is reduced by a throttle weigher at the outlet of thestructure. For reasons of operational safety and the throttle and in view of growing demands on the sewer management, an alternate throttle solution was required which would also measurethe flow.

Products in use