Quantifying subsurface propagation losses for VHF radar sounding waves in hyper-arid terrains

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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 ~60% of the overall losses in karstic environments.

Original languageEnglish
Title of host publication2018 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2018 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages6800-6803
Number of pages4
ISBN (Electronic)9781538671504
DOIs
Publication statusPublished - 31 Oct 2018
Event38th Annual IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2018 - Valencia, Spain
Duration: 22 Jul 201827 Jul 2018

Publication series

NameInternational Geoscience and Remote Sensing Symposium (IGARSS)
Volume2018-July

Conference

Conference38th Annual IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2018
CountrySpain
CityValencia
Period22/7/1827/7/18

Fingerprint

Radar
radar
Aquifers
Groundwater
desert
scattering
aquifer
Scattering
Ground penetrating radar systems
groundwater
eolian deposit
ground penetrating radar
Limestone
dune
water table
Sand
Deposits
limestone
fossil
sand

Keywords

  • Dielectric & Scattering
  • Groundwater
  • Radar
  • Sounder

ASJC Scopus subject areas

  • Computer Science Applications
  • Earth and Planetary Sciences(all)

Cite this

Scabbia, G., & Heggy, E. (2018). Quantifying subsurface propagation losses for VHF radar sounding waves in hyper-arid terrains. In 2018 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2018 - Proceedings (pp. 6800-6803). [8517891] (International Geoscience and Remote Sensing Symposium (IGARSS); Vol. 2018-July). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/IGARSS.2018.8517891

Quantifying subsurface propagation losses for VHF radar sounding waves in hyper-arid terrains. / Scabbia, Giovanni; Heggy, Essam.

2018 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2018 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 2018. p. 6800-6803 8517891 (International Geoscience and Remote Sensing Symposium (IGARSS); Vol. 2018-July).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Scabbia, G & Heggy, E 2018, Quantifying subsurface propagation losses for VHF radar sounding waves in hyper-arid terrains. in 2018 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2018 - Proceedings., 8517891, International Geoscience and Remote Sensing Symposium (IGARSS), vol. 2018-July, Institute of Electrical and Electronics Engineers Inc., pp. 6800-6803, 38th Annual IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2018, Valencia, Spain, 22/7/18. https://doi.org/10.1109/IGARSS.2018.8517891
Scabbia G, Heggy E. Quantifying subsurface propagation losses for VHF radar sounding waves in hyper-arid terrains. In 2018 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2018 - Proceedings. Institute of Electrical and Electronics Engineers Inc. 2018. p. 6800-6803. 8517891. (International Geoscience and Remote Sensing Symposium (IGARSS)). https://doi.org/10.1109/IGARSS.2018.8517891
Scabbia, Giovanni ; Heggy, Essam. / Quantifying subsurface propagation losses for VHF radar sounding waves in hyper-arid terrains. 2018 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2018 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 2018. pp. 6800-6803 (International Geoscience and Remote Sensing Symposium (IGARSS)).
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