Quality of visual sewer inspection data: The need for a new coding system?! (poster)

Previous research learned that the reproducibility of visual sewer inspection data is poor (Dirksen et al.). Further research by Arjan et al. showed that the applied coding system has a major influence on the reproducibility. The aim of this study was to give relevant suggestions to improve the quality by defining defects that are in the current...

Monitoring ground settlement to guide sewer asset management

The study into the influence of (differential) settlement on the functioning of sewer systems was initiated to search for additional criteria to make sewer pipe replacement decisions more sensible. For this Amsterdam was used as a case study. Like many megacities (e.g. Jakarta, Bangkok, Tokyo, Shanghai), Amsterdam is situated in a delta area. As...

Analysis of fat, oil, and grease deposits in sagging sanitary sewers (extended abstract)

Evaluation of operational strategies for sewer flooding based on failure data

Data from call centres at two municipalities were analysed in order to quantify flooding frequencies and associated flood risks for three main failure mechanisms causing urban flooding. The aim was to find out whether current operational strategies are efficient for flood prevention and if directions for improvement could be found. The results...

Improvement jetties near petroEcuador in La Liberdad, Ecuador

The first issue involves the accessibility of the pier of the refinery where coastal tankers moor to load or unload their cargo. The current depth at the pier is too small for large coastal tankers to fully load when mooring at the pier. In order to increase their cargo capacity, the depth in the mooring area should be increased. To expand the...