Arid
Quantifying Subsurface Propagation Losses for VHF Radar Sounding Waves in Hyper-Arid Terrains
Scabbia, Giovanni1,2; Heggy, Essam2,3
通讯作者Scabbia, Giovanni
会议名称38th IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
会议日期JUL 22-27, 2018
会议地点Valencia, SPAIN
英文摘要

To assess the detectability of fossil aquifers using sounding radars, we investigate the VHF attenuation characteristics of the most common sedimentary layers overlaying shallow groundwater systems in hyper-arid deserts. In particular, we quantify the dielectric and scattering losses using GPR profiles acquired over mafic dunes and sand sheets in Oman, and on the karstic limestone in Qatar, which both present radar characteristics representative of substantial portions of the upper layer of most desert environments of North Africa and the Arabian Peninsula. Understanding the amplitude and spatial variability of these losses will significantly support the ongoing development of airborne and orbital VHF sounders dedicated to large-scale groundwater mapping in hyper-arid areas [1]. Our results suggest that VHF radars with 80-100dB effective dynamic range at the surface are capable of probing the water table in hyper-arid sedimentary environments up to 70-120 m of depth, hence covering most of the shallow aquifers located in the considered area. We observe that dielectric absorption is the main loss factor in aeolian deposits, while volume scattering, controls similar to 60% of the overall losses in karstic environments.


英文关键词Radar Sounder Groundwater Dielectric & Scattering
来源出版物IGARSS 2018 - 2018 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM
ISSN2153-6996
出版年2018
页码6800-6803
EISBN978-1-5386-7150-4
出版者IEEE
类型Proceedings Paper
语种英语
国家Qatar;USA
收录类别CPCI-S
WOS记录号WOS:000451039806142
WOS类目Engineering, Electrical & Electronic ; Geosciences, Multidisciplinary ; Remote Sensing
WOS研究方向Engineering ; Geology ; Remote Sensing
资源类型会议论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/307428
作者单位1.Qatar Fdn, Qatar Environm & Energy Res Inst, Doha 34110, Qatar;
2.Univ Southern Calif, Ming Hsieh Dept Elect Engn, Los Angeles, CA 90089 USA;
3.NASA, Jet Prop Lab, Pasadena, CA 91109 USA
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GB/T 7714
Scabbia, Giovanni,Heggy, Essam. Quantifying Subsurface Propagation Losses for VHF Radar Sounding Waves in Hyper-Arid Terrains[C]:IEEE,2018:6800-6803.
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