Monitoring Deterioration in a Catchment’s Sewerage System

Groundwater seepage through cracks in the sewerage pipeline is a major maintenance issue in most cities’ sewer networks. The more the sewer pipes crack – and the wider these cracks are – the worse the rainfall seepage problem becomes. The total volume of rainwater seepage into the sewer pipes for a catchment is correlated with deterioration and can therefore be used to estimate the rate of deterioration. This paper describes a monitoring system that can be used to identify significant trends in sewer deterioration. Effective monitoring by asset managers can highlight the need for early maintenance such as removing tree roots from pipe cracks and patching the cracks.

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Groundwater Seepage Mapping Using Electrical Resistivity Imaging

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.773-774.1524 ◽

2015 ◽

Vol 773-774 ◽

pp. 1524-1534 ◽

Cited By ~ 4

Author(s):

Mohd Hazreek Zainal Abidin ◽

Mohamad Faizal Tajul Baharuddin ◽

Mohd Hafiz Zawawi ◽

Nor’aishah Md Ali ◽

Aziman Madun ◽

...

Keyword(s):

Electrical Resistivity ◽

Image Interpretation ◽

Ground Surface ◽

Electrical Resistivity Imaging ◽

Fresh Groundwater ◽

Groundwater Seepage ◽

Water Seepage ◽

Resistivity Imaging ◽

Electrical Resistivity Survey ◽

Seepage Problem

In recent years, electrical resistivity method (ERM) has widely being applied as an alternative tool in engineering, environmental and archeological studies. A global image of groundwater seepage problem was difficult to obtained using conventional geotechnical method due to the efficiency of cost, time and result coverage. This study was conducted using electrical resistivity survey in order to investigate the potential of the problematic zone due to the groundwater seepage problem. ABEM SAS 4000 equipment set was used in during the resistivity data acquisition stage. Six (6) resistivity spread lines (SP) were performed across the slopes area using 2-D electrical resistivity imaging. The raw data was processed using RES2DINV and SURFER software for 2-D and 3-D subsurface image. Interpretation of electrical resistivity results was verified using the existing borehole and geochemistry results. Geochemistry results analyses were used Atomic Absorption Spectrometer (AAS) for determining cation and Ion Chromatography (IC) is for anions. Anion elements were studied consists of chloride, bicarbonate, nitrate and sulfate while cation elements consists of sodium, potassium, calcium and magnesium. All the elements were analyzed by using Piper Diagram to determine geochemistry facies in the groundwater. It was found that low resistivity value (ERV) which associated to groundwater (10 ~ 100 Ωm) can be found starts from the ground surface (0 m) to a greater (> 10 m) depth of the subsurface profile. The finding of the study water seepage can be categorized as Ca-HCO that indicator a typical of shallow fresh groundwater. The finding of the study is important to determine source process of water seepage on that area. This study has successfully demonstrates that the application of ERM with supporting borehole and geochemistry data was able to provide a comprehensive results due to the groundwater leakage detection.

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Long term pollution simulation in combined sewer networks

Water Science & Technology ◽

10.2166/wst.2001.0395 ◽

2001 ◽

Vol 43 (7) ◽

pp. 83-89 ◽

Cited By ~ 3

Author(s):

B. Masse ◽

M. Zug ◽

J. P. Tabuchi ◽

B. Tisserand

Keyword(s):

Conceptual Model ◽

Combined System ◽

Sewerage System ◽

Sewer Network ◽

Reference Flow ◽

Combined Sewer ◽

Stream System ◽

Long Time ◽

Sewer Networks

This paper presents results of long term pollution simulations on the example of the sewerage system of Grand-Couronne. This modelling work is part of a study where objective is to develop a method to define the reference flow of a WWTP. The model HYDROWORKS DM™ has been successfully validated in hydraulics and pollution for the sewer network, for long time simulations. A conceptual model has been built to model the pollution in the tank at the outlet of the combined system. One synthetic year of rain has been used to simulate the working of the “up stream system” of the WWTP (combined sewer + tank + separate sewer + pre-treatments) and has been successfully validated by measurements of the 1998-1999 year. If this paper is focused on the “up stream system”, the SIMBA/SIMBAD WWTP model has been successfully calibrated and validated too, and the combination represents a fully validated “Integrated Model” for the sewerage system.

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Automatic Identification of Sewer Fault Types Using CCTV Footage

10.29007/w41w ◽

2018 ◽

Author(s):

Joshua Myrans ◽

Zoran Kapelan ◽

Richard Everson

Keyword(s):

Real Life ◽

Random Forest Classifier ◽

Automatic Identification ◽

Feature Descriptor ◽

Sewer Pipes ◽

Fault Type ◽

Wide Range ◽

The World ◽

Water Companies ◽

Sewer Networks

Water companies all over the world regularly perform inspections of their sewer networks. The data collected this way is then analysed by human technician which is time consuming and expensive. Previous work by the authors has developed methodology that can automatically detect faults in sewer pipes using standard CCTV footage. This paper presents a methodology to automatically identify types of detected faults aiming to further improve the efficiency and accuracy (i.e. consistency) of surveys. The methodology calculates a feature descriptor for individual frames of CCTV footage, before predicting the contents using a multi-class Random Forest classifier. Demonstrated on a comprehensive library of frames extracted from real-life CCTV footage of a UK water company, the methodology correctly identified the fault type in 71% of frames. Most common fault types were included in this experiment, covering a wide range of pipe sizes and materials, including vitrified clay, PVC and brick. Overall, this preliminary work shows promise for application in industry, proving an effective tool for analysing CCTV surveys.

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Monitoring des Arzneimittelmissbrauchs 2006 bei Klienten von Suchtberatungsstellen (PHAR-MON)

SUCHT - Zeitschrift für Wissenschaft und Praxis / Journal of Addiction Research and Practice ◽

10.1024/2007.07.05 ◽

2007 ◽

Vol 53 (7) ◽

pp. 65-77 ◽

Cited By ~ 1

Author(s):

Susanne Roesner ◽

Heinrich Küfner

Keyword(s):

Monitoring System

Hintergrund und Zielsetzung: PHAR-MON ist ein Monitoring-System, das die auf dem deutschen Markt befindlichen Arzneimittel in ihrer Bedeutung für die Entwicklung von Missbrauch und Abhängigkeit in Suchtberatungsstellen überwacht. Methodik: Klienten ambulanter Beratungsstellen werden im Rahmen der Standarddokumentation zu ihrem Arzneimittelkonsum befragt und Fälle eines abhängigen Konsums, eines schädlichen Gebrauchs oder eines Missbrauchs in PHAR-MON dokumentiert. Ergebnisse: Im Jahr 2006 wurden insgesamt 448 Meldungen von 276 überwiegend alkohol- und drogenabhängigen Klienten in das Monitoring einbezogen. Tranquilizer vom Benzodiazepin-Typ wurden in allen Klientengruppen mit Anteilen zwischen 29,1 % und 35,3 % am häufigsten dokumentiert. An benzodiazepinabhängige Klienten werden zunehmend auch Nicht-Benzodiazepin-Hypnotika verordnet. Bei opioidabhängigen Klienten war im Zeitraum der letzten fünf Jahre ein Anstieg im missbräuchlichen Substitutionsmittelkonsum von 14,9 % auf 33,8 % zu verzeichnen. Schlussfolgerungen: Das Risiko gefährlicher Wechselwirkungen zwischen Arzneimitteln mit Alkohol und Drogen sollte stärker als bisher in die ärztliche Verordnungsentscheidung einbezogen werden.

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