Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

The drinking water network: software for forecasting damage

06.11.2008
In France, drinking water is transported to the tap via an 850,000-km network of underground pipes: the condition of this network directly influences the quality of the water and the health of millions of consumers.

Such a large network – accounting for more than 80% of the value of this national legacy, i.e., the installations of a service providing the population with drinking water – is of major importance to the public bodies managing this resource.

How should the frequency of equipment renewal be assessed and these works be prioritized while containing costs? To aid the managers of this network, Cemagref scientists in Bordeaux have developed software that can forecast the network’s aging, thus identifying the pipes that are at the highest risk.

With time, the hydraulic performance and the quality of the water transported by the pipes in place decrease and water losses and damage to the infrastructure increase. The latter phenomena, which can cause spectacular damage (floods, water cuts, disturbances in road traffic), are generally recorded by the agencies responsible for their maintenance within the local government bodies.

Corrosion, an increase in water pressure in the network, destabilization of the underlying land by roadworks, the conditions at installation, and age can all cause damage. While the duration and lifespan of the pipes can be long: some, put in place more than 150 years ago, continue to function properly; certain sections, however, deteriorate more quickly and should be replaced earlier.

- Modeling the risk of damage...

To assist the managers of this network in evaluating how often various sections of the network need to be replaced, as well as in organizing and planning the works in sync with roadworks, for example, Cemagref’s Netwater team scientists are developing tools that can supervise network aging, from data collection to the decision to renew pipes. Software called Casses, on the market since October 2007, was developed after research lasting more than 10 years. The approach chosen estimates, for a future period, the number of breakages that each section of piping will undergo. It is based on data available in the archives that describes the pipes, their environment, and the past history of damage. Initiated in 1994, this work was pursued within a CARE-W 1 European research program, from 1999 to 2002, during which comparison with field data made it possible to assess the relevance of this approach and refine it. Since then, the Casses software has been successfully applied in France and abroad, notably in the cities of Oslo and Las Vegas. Designed to adapt to the diversity of management practices, it has been shown to perform well in predicting the number of future breakages and in identifying the pipes that are at the greatest risk.

- and evaluating the extent of damage…

A second software program, baptized Criticité, also developed and marketed by Cemagref, was designed to quantify the distruptions in water distribution when a section is damaged. Distribution is not disrupted in the same proportions if the damage occurs at the end of the network that serves a few users or in a water main coming out of a reservoir. For a given event, the interaction between its probability, calculated by Casses, and its impact, provided by Criticité, provides information on the extent of the risk related to this event. Studies are ongoing so the users that are particularly deprived of water as well as those who have no water can be taken into account, as the current version of the software forecasts.

- And the small towns ?

Mutualizing the data of small towns so that they can take advantage of statistical modeling: such is the objective of the SIROCO program. This software was developed by Cemagref and G2C Environnement R&D. Individually, these small towns do not have sufficient data for an optimal use of the Casses forecasting models. In addition to Casses and Criticité, SIROCO uses a geographical information system, the Cart@jour GIS to mutualize data. This is an integrated system that allows the user to prioritize the sections of the network that are candidates for renewal.

Marie Signoret | alfa
Further information:
http://www.cemagref.fr
http://www.cemagref.fr/Informations/Presse/InfMediaEV/infomedia85EV/im85_reseau_eau_article2.htm

More articles from Information Technology:

nachricht UT professor develops algorithm to improve online mapping of disaster areas
29.11.2016 | University of Tennessee at Knoxville

nachricht New standard helps optical trackers follow moving objects precisely
23.11.2016 | National Institute of Standards and Technology (NIST)

All articles from Information Technology >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Novel silicon etching technique crafts 3-D gradient refractive index micro-optics

A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.

Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...

Im Focus: Quantum Particles Form Droplets

In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.

“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...

Im Focus: MADMAX: Max Planck Institute for Physics takes up axion research

The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.

The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...

Im Focus: Molecules change shape when wet

Broadband rotational spectroscopy unravels structural reshaping of isolated molecules in the gas phase to accommodate water

In two recent publications in the Journal of Chemical Physics and in the Journal of Physical Chemistry Letters, researchers around Melanie Schnell from the Max...

Im Focus: Fraunhofer ISE Develops Highly Compact, High Frequency DC/DC Converter for Aviation

The efficiency of power electronic systems is not solely dependent on electrical efficiency but also on weight, for example, in mobile systems. When the weight of relevant components and devices in airplanes, for instance, is reduced, fuel savings can be achieved and correspondingly greenhouse gas emissions decreased. New materials and components based on gallium nitride (GaN) can help to reduce weight and increase the efficiency. With these new materials, power electronic switches can be operated at higher switching frequency, resulting in higher power density and lower material costs.

Researchers at the Fraunhofer Institute for Solar Energy Systems ISE together with partners have investigated how these materials can be used to make power...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ICTM Conference 2017: Production technology for turbomachine manufacturing of the future

16.11.2016 | Event News

Innovation Day Laser Technology – Laser Additive Manufacturing

01.11.2016 | Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

 
Latest News

UTSA study describes new minimally invasive device to treat cancer and other illnesses

02.12.2016 | Medical Engineering

Plasma-zapping process could yield trans fat-free soybean oil product

02.12.2016 | Agricultural and Forestry Science

What do Netflix, Google and planetary systems have in common?

02.12.2016 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>