NDLI: Monitoring and Early Warning the Debris Flow and Landslides Using VHF Radar Pulse Echoes From Layering Land Media

Content Provider	IEEE Xplore Digital Library
Author	Ya-Qiu Jin Feng Xu
Copyright Year	2004
Abstract	To monitor debris flows and landslides, geologic surveying has been usually implemented to ascertain where these natural hazards might happen. These traditional observations at discrete sites are very restrictive in both temporal and spatial scales, and cannot make accurate and timely decision for early warning of geologic disaster occurrences. In this letter, very high frequency (VHF; ~100 MHz) pulsed radar is proposed as a monitoring tool to probe the layering land media. Due to large penetration depth of VHF radar on the order of tens of meters, radar echoes can detect the change of water content underneath ground surface, which is an essential stimulator to cause the debris flow and landslides. A model of layering land media embedded by random scatterers (stone or water) with randomly rough interfaces is presented, and polarimetric radar range profiles from underground structures under different situations are numerically simulated. Results show that distinct features in radar range profiles can be directly attributed to underground water content change and/or water distribution. The proposed VHF radar seems promising for early warning of geologic hazards. The differences of radar images between the normal day and warning days, e.g., after severe storm, can be used to predict potential occurrence of debris flow or landslides.
Sponsorship	IEEE Geoscience and Remote Sensing Society
Starting Page	575
Ending Page	579
Page Count	5
File Size	557137
File Format	PDF
ISSN	1545598X
Volume Number	8
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-05-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Radar Scattering Terrain factors Media Soil Geology Monitoring very high frequency (VHF) radar echoes Early warning of debris flow Mueller matrix solution multilayer media
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Geotechnical Engineering and Engineering Geology

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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