Assessing the condition of underground pipelines such as water lines, sewer pipes, and telecommunication conduits in an automated and reliable manner is vital to the safety and maintenance of buried public infrastructure. In order to fully automate the condition assessment of buried pipes, it is necessary to develop a robust defect analysis and interpretation system. This paper presents the dev...

Late research and developments show a trend towards integrated models to simulate the urban drainage cycle to offer a complete picture of the system’s performance. However, in regard to integrated models considering water quality, only few actual case studies exist. We developed such a model for the urban drainage system of Graz, Austria containing runoff generation, a sewer system, actuators a...

Nutrient pollution and associated eutrophication of freshwaters threaten the ecological integrity and the services provided to humans by lakes. We examined how human residential development influenced the level of lake eutrophication in the Seattle, WA, USA, region. We surveyed 30 lakes and measured 3 indicators of eutrophication: concentrations of chlorophyll-a and phosphorus, and the proporti...

In this paper we address the problem of automatic measurement of the shape of sewer pipes. We describe a method for recovering the interior shape of a sewer pipe from a video sequence that is acquired by a fish-eye lens camera moving inside the pipe. The method is based on solving the general structure-from-motion problem by tracking interest points across successive video frames. Here the inte...

The rise in sea levels due to climate change causes a decrease the discharge capacity of sewer pipes and an increase risk urban inundation encroaching outfall coast. Therefore, it is crucial quantitatively evaluate predict increasing degree properly respond that aggravated by effects rising levels. In this study, two research areas were selected consideration regional characteristics coastal ar...

The principal sources and pathways of pharmaceutical and personal product (PPCP) compounds within an urban drainage system are identified with combined sewer discharges from households and infiltration from landfill/land sludge applications constituting major routeways. Illicit connections, sewer exfiltration and reclaimed domestic wastewaters comprise potentially significant other contaminant ...

Abstract: This paper addresses the problem of robust identification/fault detection when a model with parametric modelling is considered. Two identification methods are introduced following, respectively, the worst-case and set-membership approaches. In particular those algorithms will use zonotopes to bound the parametric uncertainty. These two identification approaches lead to two robust faul...

OBJECTIVES This study compared the prevalence of Leptospira interrogans and hepatitis A virus (HAV) antibodies in serum samples from sewer workers and controls. METHODS A blood sample was obtained from 76 of the 101 municipal sewer workers (75%) of Quebec City and from two controls matched to each for age and sex. Testing was done for antibodies against serovars of Leptospira icterohaemorragi...

Combined Sewer Overflows (CSO) of 671 Functional Urban Areas (FUAs) throughout the European Union + UK (EU28), representing almost half EU28 population. CSO loads can be quantified at local scale through measurements, or with calibrated hydrological models. However, they are difficult to quantify a large (e.g. regional national), due lack data, and models used cannot applied in absence knowledg...