After a big earthquake, it's key to keep the water system afloat. Water is necessary for life, and it fights the fires that often accompany such disasters.
UC Irvine engineers plan to outfit the local water system with sensors that will alert officials when and where pipes crack or break, hastening repair - thanks to nearly $5.7 million over three years from the National Institute of Standards and Technology and several local water groups.
"When an earthquake occurs and infrastructure systems fail, continued service of the water network is most critical," said Masanobu Shinozuka, lead project investigator and civil & environmental engineering chair. "Before anything happens, I'd like to have a pipe monitoring system in place to let us know when and where damage occurs. It could minimize misery and save lives."
About 240,000 water-main breaks occur per year in the U.S., according to the Environmental Protection Agency. For example, in December a burst sent about 150,000 gallons of water per minute onto a busy Maryland road, stranding motorists in the icy deluge. Water system failures are estimated to waste up to 6 billion gallons of drinking water every day.
Shinozuka and Pai Chou, electrical engineering & computer science associate professor, have created CD-sized sensing devices that attach to the surface of pressurized (drinking water) and nonpressurized (wastewater) pipes. They will detect vibration and sound changes that could indicate pipe problems. Through antennae, the sensors will relay information wirelessly over long distances to a central location for recording, processing and diagnostic analysis.
Initially, the sensor network will cover about one square mile of the local water system; eventually, it could encompass more than 10 square miles - the largest of its kind to date. A small-scale pressurized water pipe network designed and built by UCI researchers has confirmed that this type of damage identification works well.
The research team now is designing a system that functions underground as well as over a larger area. The main hurdles, Shinozuka said, are powering the sensors (batteries and solar energy are not strong enough), making them more cost-effective and robust in tough environments, and achieving long-range wireless communication efficiently and accurately.
Using existing pipe networks, the team will then test and calibrate the sensors by simulating and monitoring pressure changes equivalent to those arising from actual pipe damage. The sensors will complement an existing monitoring system called Supervisory Control and Data Acquisition.
"SCADA sensors are too sparsely placed for identifying damage with the kind of precision we desire when a large earthquake or other natural hazard affects many locations," Shinozuka said.
"An isolated malfunction is far different from a situation in which pipes break all over the place," he said. "Our next-generation system will inform us as soon as possible when and where damage occurs and to what extent so we can better mitigate the consequences."
As the research progresses, the team plans to develop methods of rapidly repairing pipe damage at joints and other vulnerable locations.
Collaborating with UCI on the endeavor are Fountain Valley-based Earth Mechanics Inc., the Irvine Ranch Water District, the Orange County Sanitation District and the Santa Ana Watershed Project Authority.
About the University of California, Irvine: Founded in 1965, UCI is a top-ranked university dedicated to research, scholarship and community service. Led by Chancellor Michael Drake since 2005, UCI is among the fastest-growing University of California campuses, with more than 27,000 undergraduate and graduate students, 1,100 faculty and 9,200 staff. The top employer in dynamic Orange County, UCI contributes an annual economic impact of $4.2 billion. For more UCI news, visit http://today.uci.edu/.
News Radio: UCI maintains on campus an ISDN line for conducting interviews with its faculty and experts. Use of this line is available for a fee to radio news programs/stations that wish to interview UCI faculty and experts. Use of the ISDN line is subject to availability and approval by the university.
Jennifer Fitzenberger | EurekAlert!
Dispersal of Fish Eggs by Water Birds – Just a Myth?
19.02.2018 | Universität Basel
Removing fossil fuel subsidies will not reduce CO2 emissions as much as hoped
08.02.2018 | International Institute for Applied Systems Analysis (IIASA)
University of Connecticut researchers have created a biodegradable composite made of silk fibers that can be used to repair broken load-bearing bones without the complications sometimes presented by other materials.
Repairing major load-bearing bones such as those in the leg can be a long and uncomfortable process.
Study published in the journal ACS Applied Materials & Interfaces is the outcome of an international effort that included teams from Dresden and Berlin in Germany, and the US.
Scientists at the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) together with colleagues from the Helmholtz-Zentrum Berlin (HZB) and the University of Virginia...
Novel highly efficient and brilliant gamma-ray source: Based on model calculations, physicists of the Max PIanck Institute for Nuclear Physics in Heidelberg propose a novel method for an efficient high-brilliance gamma-ray source. A giant collimated gamma-ray pulse is generated from the interaction of a dense ultra-relativistic electron beam with a thin solid conductor. Energetic gamma-rays are copiously produced as the electron beam splits into filaments while propagating across the conductor. The resulting gamma-ray energy and flux enable novel experiments in nuclear and fundamental physics.
The typical wavelength of light interacting with an object of the microcosm scales with the size of this object. For atoms, this ranges from visible light to...
Stable joint cartilage can be produced from adult stem cells originating from bone marrow. This is made possible by inducing specific molecular processes occurring during embryonic cartilage formation, as researchers from the University and University Hospital of Basel report in the scientific journal PNAS.
Certain mesenchymal stem/stromal cells from the bone marrow of adults are considered extremely promising for skeletal tissue regeneration. These adult stem...
In the fight against cancer, scientists are developing new drugs to hit tumor cells at so far unused weak points. Such a “sore spot” is the protein complex...
13.04.2018 | Event News
12.04.2018 | Event News
09.04.2018 | Event News
20.04.2018 | Physics and Astronomy
20.04.2018 | Interdisciplinary Research
20.04.2018 | Physics and Astronomy