Science Service System

Summary of Proposal HYD0836

TitleAnalysis of penetration depth of X,C and L-band for groundwater and moisture level change measurement
Investigator Poncos, Valentin - Kepler Space Inc. / University of Calgary, SAR systems and exploitation
Team Member
Director Oaie, Gheorghe - Marine Geology and Ecology Institute, Marine Geology and Sedimentology
SummaryThe objective of the proposal is to study the penetration depth of the radar as a function of frequency and also the variation of the penetration depth as a function of soil moisture and grounwater levels variation. The Danube Delta is a good study area because of the presence of uncompacted soil and large variation of moisture and grounwater level, controlled by the Danube river debit and occasionally by rainfalls. Soil moisture is an important factor for agriculture and vegetation health in general and also for the ecological system that depends on it. Previous studies on this subject used ERS/ASAR and the ocassional Palsar data; SOAR-DLR represents an important opportunity to study this subject using higher resolution and better quality data. The method will consist in InSAR analysis; interferograms generation, deformation maps calculation and comparison between frequency bands. Results will be correlated to the rainfall activity and Danube river debit variation. Ideally, the data acquisition will span one full year in order to characterize the soil moisture variatiation in every season. This is equivalent to 33 TerraSAR-X scenes at 11 days repeat pass. If decreas the repeat pass to 22 days, there is a risk that the scenes will decorrelate. ERS/ASAR data at 35 days show good correlation in 70% of the areas but at 70 days the coherence is present only in 30% of the areas. The areas that lose coherence faster are the most interesting ones because according with L-band measurements, the dynamics is the highest there. Based on previous results with L-band, the chances of succes for this project are high. The deliverables will consist in conference papers and hopefully on publications.

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DLR 2004-2016