Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Geologists’ model reveals foundation flaws in bedrock under new urban centers

13.11.2002


Before developers decide to make the desert bloom, they better take a look at what’s under the surface of the Earth.



That’s the conclusion of research by Texas A&M University geologist Mohamed Aly, who’s using GIS (geographic information systems) techniques to conduct engineering geomorphology assessments of some of Egypt’s newest urban developments to predict - and thus avoid - foundation problems stemming from instabilities in the underlying bedrock.

The resulting GIS model may also be used to study similar new developments worldwide.


"For the past 50 years, the Egyptian government has encouraged the building of new cities in the desert, away from the Nile valley and its delta, where 96 percent of the Egyptian population lives," said Aly, a doctoral student in the Department of Geology and Geophysics of the College of Geosciences. "New Minia City is one of 16 developments being built in the desert over the last few years. It is still close to the Nile, from which it gets its drinking water and to Old Minia City, which supplies surface necessities.

"While New Minia City is in the early stages of construction, its planners wanted an assessment of any geo-environmental problems that might occur," he continued. "Our study revealed that some areas of proposed development were underlain by soft highly fractured and jointed limestone, which is prone to dissolution by acidic rainfall, creating sink holes and caves in the heterogeneous bedrock."

Other new Egyptian cities had not investigated their bedrock foundations before building, creating later problems and leading authorities to seek the advice of geologists like Aly, who, along with being a student in Texas, holds an assistant lecturer appointment at Zagazig University, Egypt.

Aly and advisers John Giardino, dean of graduate studies and professor of geology and geophysics, and Andrew Klein, professor in the geography department, developed a GIS model to assess New Minia City’s site risk, urban development suitability and land use potentials. Aly presented a paper on their model at this month’s annual meeting of the Geological Society of America.

GIS produces a digitally registered geographic database from data layers obtained from different sources, such as satellite remote sensing and seismic ground testing. Aly’s model system used data layers including geology, land use/cover, soil types, karst distribution, fracture density, slope, stream ordering, roads and administrative boundaries.

"Our GIS model, which was found to be effective at revealing the foundation bedrock problems, was adopted locally to assess the area’s main geo-environmental problems threatening urban development of New Minia City," Aly said.

"We hope the model will provide a good base for informed decision-making in support of integrated sustainable development for New Minia City, allowing more geologically unstable areas to be used for agriculture or parks, instead of for housing or other structures. Finally, we recommend our GIS model be used not only for this city, but also for new cities with similar geologic and geomorphologic settings across the world."


###
Contact: Judith White, 979-845-4664, jw@univrel.tamu.edu; Mohamed Aly, 979-862-9153, aly@tamu.edu.


Judith White | EurekAlert!
Further information:
http://www.tamu.edu/

More articles from Earth Sciences:

nachricht Colorado River's connection with the ocean was a punctuated affair
16.11.2017 | University of Oregon

nachricht Researchers create largest, longest multiphysics earthquake simulation to date
14.11.2017 | Gauss Centre for Supercomputing

All articles from Earth Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: A “cosmic snake” reveals the structure of remote galaxies

The formation of stars in distant galaxies is still largely unexplored. For the first time, astron-omers at the University of Geneva have now been able to closely observe a star system six billion light-years away. In doing so, they are confirming earlier simulations made by the University of Zurich. One special effect is made possible by the multiple reflections of images that run through the cosmos like a snake.

Today, astronomers have a pretty accurate idea of how stars were formed in the recent cosmic past. But do these laws also apply to older galaxies? For around a...

Im Focus: Visual intelligence is not the same as IQ

Just because someone is smart and well-motivated doesn't mean he or she can learn the visual skills needed to excel at tasks like matching fingerprints, interpreting medical X-rays, keeping track of aircraft on radar displays or forensic face matching.

That is the implication of a new study which shows for the first time that there is a broad range of differences in people's visual ability and that these...

Im Focus: Novel Nano-CT device creates high-resolution 3D-X-rays of tiny velvet worm legs

Computer Tomography (CT) is a standard procedure in hospitals, but so far, the technology has not been suitable for imaging extremely small objects. In PNAS, a team from the Technical University of Munich (TUM) describes a Nano-CT device that creates three-dimensional x-ray images at resolutions up to 100 nanometers. The first test application: Together with colleagues from the University of Kassel and Helmholtz-Zentrum Geesthacht the researchers analyzed the locomotory system of a velvet worm.

During a CT analysis, the object under investigation is x-rayed and a detector measures the respective amount of radiation absorbed from various angles....

Im Focus: Researchers Develop Data Bus for Quantum Computer

The quantum world is fragile; error correction codes are needed to protect the information stored in a quantum object from the deteriorating effects of noise. Quantum physicists in Innsbruck have developed a protocol to pass quantum information between differently encoded building blocks of a future quantum computer, such as processors and memories. Scientists may use this protocol in the future to build a data bus for quantum computers. The researchers have published their work in the journal Nature Communications.

Future quantum computers will be able to solve problems where conventional computers fail today. We are still far away from any large-scale implementation,...

Im Focus: Wrinkles give heat a jolt in pillared graphene

Rice University researchers test 3-D carbon nanostructures' thermal transport abilities

Pillared graphene would transfer heat better if the theoretical material had a few asymmetric junctions that caused wrinkles, according to Rice University...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Ecology Across Borders: International conference brings together 1,500 ecologists

15.11.2017 | Event News

Road into laboratory: Users discuss biaxial fatigue-testing for car and truck wheel

15.11.2017 | Event News

#Berlin5GWeek: The right network for Industry 4.0

30.10.2017 | Event News

 
Latest News

NASA detects solar flare pulses at Sun and Earth

17.11.2017 | Physics and Astronomy

NIST scientists discover how to switch liver cancer cell growth from 2-D to 3-D structures

17.11.2017 | Health and Medicine

The importance of biodiversity in forests could increase due to climate change

17.11.2017 | Studies and Analyses

VideoLinks
B2B-VideoLinks
More VideoLinks >>>