Leakage Water Survey on the Sewer Network in Ritoniemi, Jyväskylä
We began the leak survey on the sewer network in Ritoniemi, Jyväskylä, by dividing the 15-km network into subcatchments and measuring the total leakage in the area. This revealed the three catchments with the most leakage. These areas were then examined more closely to determine the sources of the leaks. This way, we first obtained an overall view of the area and then, with the aid of the closer examination, a detailed analysis of the leaks. The majority of these leaks are easy enough to repair with simple measures, and that already significantly reduces the amount of excess water flowing into the sewer network. The investments in the surveys pay for themselves in the form of saved energy (pumping stations) and wastewater treatment costs.