Listening for Landslides

Researchers have developed a new technology to sense the acoustic conditions that indicate oncoming landslides.

The technology can be especially useful in flood-prone areas and hillsides villages constructed ad hoc.

"Earlier attempts at landslide warning systems had problems that the Loughborough group has solved. Like the new device, earlier versions converted acoustical energy to digital signals. Some operated on low-frequency sound, which travels farther before it attenuates. The main drawback was that this range of frequencies is in a band that's very noisy, and the systems returned too many false positives. But high-frequency devices struggled to capture the shear surface sounds because of attenuation and required off-site computing to handle the system's data-processing duties.

The Loughborough team sidestepped these problems with a high-frequency device that takes readings at a rate of 20 to 30 kilohertz. They limited the effect of attenuation by boosting the sound with as low tech a solution as it gets: gravel."

Full Story: Sensor System Yields Landslide Warnings

Comments

Prepare for the AICP* Exam

Join the thousands of students who have utilized the Planetizen AICP* Exam Preparation Class to prepare for the American Planning Association's AICP* exam.
Starting at $245
AICP CTP Storefont Display

The first online AICP* CTP exam prep class

Are you ready to take the AICP* Certified Transportation Planner exam?
Priced at $245 for May exam!
Women's t-shirt with map of Los Angeles

City T-Shirts for the ladies!

Women's Supersoft CityFabric© Fashion Fit Tees. Now available in six different cities.
$24.00
Planetizen Courses image ad

Planetizen Courses

Advance your career with subscription-based online courses tailored to the urban planning professional.
Starting at $16.95 a month