男友太凶猛1v1高h,大地资源在线资源免费观看 ,人妻少妇精品视频二区,极度sm残忍bdsm变态

USEUROPEAFRICAASIA 中文雙語Fran?ais
China
Home / China / Innovation

Satellites may warn of killer landslides

By ANGUS MCNEICE | China Daily | Updated: 2017-07-14 07:54

Researchers in China and the United Kingdom hope to use satellite imaging for the early detection of landslides in Southwest China, such as the one in late June that engulfed a village in Maoxian county, Sichuan province, leaving at least 10 dead and 73 missing.

A team of researchers from the UK's Newcastle University and several Chinese institutions analyzed before and after satellite images of the Maoxian region that show the danger area had been moving at a slow pace for at least six months before failing completely.

The team identified 10 other active landslides in the region and forwarded the information to authorities.

"When you consider this sort of time scale, it suggests that a landslide early-warning system is not only possible but would also be extremely effective," Li Zhenhong, professor of imaging geodesy at Newcastle University, said.

Brought on by heavy rainfall, the Maoxian landslide swept through homes in the village of Xinmo and buried a 1.6 kilometer section of road under an estimated 8 million cubic meters of rubble. A second landslide hit the village three days later, and a third also struck Shidaguan, a town 20 km away.

"If we can detect movement at a very early stage," Li said, "then in many cases it is likely we would have time to put systems in place to save lives."

Researchers from Chengdu University of Technology, Tongji University, the China Academy of Space Technology and Wuhan University, participated in the study. They analyzed images captured by the European Space Agency's Sentinel-1 satellite radar mission, composed of two polar-orbiting satellites, that operate day and night in all weather conditions.

Sichuan is frequently disrupted by tremors.

In 2008, one of the most devastating earthquakes in China's history struck the province, claiming more than 69,000 lives.

The team hopes to use the technology to build a landslide database, mapping active landslides in Sichuan and other seismically active regions of Southwest China.

"Going forward, we can use this information to set up real-time monitoring systems using existing satellites such as GPS, Beidou and Galileo for those sites and whenever we detect abnormal behavior, the system can send out an early-warning message," Li said.

Landslides are among the most common natural disasters.

More than 20,000 people were killed by more than 7,000 rainfall-caused landslides recorded around the world between 2007 and 2015, according to NASA's Global Landslide Catalog.

Editor's picks
Copyright 1995 - . All rights reserved. The content (including but not limited to text, photo, multimedia information, etc) published in this site belongs to China Daily Information Co (CDIC). Without written authorization from CDIC, such content shall not be republished or used in any form. Note: Browsers with 1024*768 or higher resolution are suggested for this site.
License for publishing multimedia online 0108263

Registration Number: 130349
FOLLOW US
 
主站蜘蛛池模板: 南城县| 长春市| 赞皇县| 凌源市| 榆树市| 新绛县| 当阳市| 贺兰县| 宁城县| 中西区| 江都市| 澜沧| 大姚县| 札达县| 平远县| 海林市| 乐都县| 石门县| 铁力市| 文登市| 顺平县| 富民县| 邹城市| 兴安盟| 道孚县| 莲花县| 奇台县| 平和县| 嘉峪关市| 扶余县| 溆浦县| 仁怀市| 江城| 黄龙县| 贵定县| 敦煌市| 屏东县| 维西| 黄龙县| 黄梅县| 桂林市|