Asian Surveying & Mapping
Breaking News
Russian Scientists to Set Up Space Observation Posts in Arctic by 2020
MOSCOW - Russian scientists intend to set up a...
Soyuz Launches European Weather Satellite
WASHINGTON — A Soyuz rocket successfully launched a European...
China-France Oceanography Satellite to Assist with Disaster Management
China and France launched a new joint Earth observation...
Countdown to the 1st GMES & Africa forum in Gabon
The African Union Commission is Organizing the 1st forum...
Harnessing Earth-observation data for practical healthcare applications
The EU-funded AURORA project will develop technologies to turn...
HOT Indonesia Completed Mapping Lifeline Infrastructures in Semarang
Humanitarian OpenStreetMap Team has completed mapping Semarang, the capital...
Israel to provide EU unmanned maritime patrol system in 68 mln USD deal
JERUSALEM - Israel's Elbit Systems will operate its flagship...
Japan launches greenhouse gas observing satellite
Japan has launched a new satellite to observe greenhouse...
Philippine-made Diwata-2B goes into orbit with KhalifaSat
Just as the UAE rejoiced when the first 100-per...
Japan’s NTT & Furuno Electric develop GNSS receiver for severe reception conditions
Nippon Telegraph and Telephone Corporation (NTT) and Furuno Electric...

Kolkata, situated on the banks of the Hooghly River in the Indo-Gangetic plain, is home to an estimated 14.1 million people. But like most cities in India, it’s worried about depleting groundwater. Data from the Kolkata Municipal Corporation report of 2007 shows a fall in groundwater from 11 meters to 7 meters between 1958 to 2003. Now, an alarming study shows that this depletion could slowly sink the city due to land subsidence.

In this study, researchers from the Anna University, Chennai, used a microwave-based remote-sensing technique to assess changes in Kolkata’s land subsidence for the years 2003, 2007 and 2011.

“The remote-sensing technique allows the detection and monitoring of ground settlements by generating velocity maps of the underground deformation with high accuracy up to the millimeter”, explained Dr. Elango, professor at Anna University and one of the authors of the study.