TY - GEN
T1 - Assessing the potential of groundwater resources west of Aswan, Egypt, using ALOS/PALSAR polarimetric information
AU - Gaber, Ahmed
AU - Koch, Magaly
AU - Sato, Motoyuki
PY - 2011/1/1
Y1 - 2011/1/1
N2 - The hydrological setting of the area west of Aswan city. Egypt that is mainly covered by dry sand is still not well understood, and its groundwater potential remains largely unknown. The ALOS/PALSAR L-band sensor has been used to detect and delineate the subsurface structures along the study area. The circular polarization transformation has been applied on the ALOS/PALSAR full polanmetric data by changing the orientation angle (ψ=0°) and elliptical angle (χ = 45°) and revealed many buried faults in various strike directions, which were not reported on the last version of the official geologic map. Such derived circular polarization images were further enhanced by applying the Optimal Polarization Contrast Enhancement (O.P.C.E) method. Thus the proper stocks vectors of the transmitter and receiver have been calculated from the PALSAR full polanmetric data and plotted on the Poincare sphere to determine the best polarization states for imaging these buried faults. The moisture content of the study sites was generally low, with an average of roughly 0.3% during the field campaign. Therefore, the average Root Mean Square Height (hRMs) of the surface roughness was 0.01 cm across all sites. On the other hand, 21 conventional 2D-GPR profiles have been acquired using 270 MHz antenna to validate the radar remote sensing results. These GPR profiles reveal obvious offset in the subsurface stratigraphy.
AB - The hydrological setting of the area west of Aswan city. Egypt that is mainly covered by dry sand is still not well understood, and its groundwater potential remains largely unknown. The ALOS/PALSAR L-band sensor has been used to detect and delineate the subsurface structures along the study area. The circular polarization transformation has been applied on the ALOS/PALSAR full polanmetric data by changing the orientation angle (ψ=0°) and elliptical angle (χ = 45°) and revealed many buried faults in various strike directions, which were not reported on the last version of the official geologic map. Such derived circular polarization images were further enhanced by applying the Optimal Polarization Contrast Enhancement (O.P.C.E) method. Thus the proper stocks vectors of the transmitter and receiver have been calculated from the PALSAR full polanmetric data and plotted on the Poincare sphere to determine the best polarization states for imaging these buried faults. The moisture content of the study sites was generally low, with an average of roughly 0.3% during the field campaign. Therefore, the average Root Mean Square Height (hRMs) of the surface roughness was 0.01 cm across all sites. On the other hand, 21 conventional 2D-GPR profiles have been acquired using 270 MHz antenna to validate the radar remote sensing results. These GPR profiles reveal obvious offset in the subsurface stratigraphy.
KW - ALOS/PALSAR L-band
KW - Buried faults
KW - Egypt
KW - GPR
KW - groundwater potential
KW - western desert
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U2 - 10.1109/IGARSS.2011.6049786
DO - 10.1109/IGARSS.2011.6049786
M3 - Conference contribution
AN - SCOPUS:80955139543
SN - 9781457710056
T3 - International Geoscience and Remote Sensing Symposium (IGARSS)
SP - 2761
EP - 2764
BT - 2011 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2011 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2011 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2011
Y2 - 24 July 2011 through 29 July 2011
ER -