STOPP I AVLOPPSLEDNINGAR - PROBLEMETS OMFÅNG, SYMPTOM OCH ORSAK / Blockage in sewer pipes - the cause and symptom of the problem
This paper presents the results of a study on blockages in sewer pipes in 10 Swedish municipalities. The blockage rate has been studied over a ten year period. There was no trend of increase or decrease of the blockage rate over the studied period. The blockage rare was found ro be higher in the periodjanuary to March than over the rest of the year. A systematizing of the cause and symptom of sewer blockage has also been done, with the objective of defining the concept of sewer blockage. The study is a part of continuing projecr called PUFF, with the objective to develop guidelines for maintenance and renewal of water and sewer pipe systems.