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--- mika:report [2014/12/10 16:12]
usherm42
+++ mika:report [2014/12/10 16:19]
usherm42
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 I used the ENVI program to make horizontal profiles through interferograms that showed signs of deformation. Radians of phase difference were converted to centimeters of vertical displacement using the equation
-{{:mika:eqn|}} \\
+{{ :mika:eqn.png?100 |}}
+where phi is the phase difference in radians, lambda = 5.6 cm is the Envisat pulse wavelength, and d is the vertical displacement in the line of sight.  Though this isn’t an accurate measurement of ground displacement, it is sufficient to check for errors and the feasibility of the displacement values.
 ====Results====
+Six interferograms were produced over the area of interest (Fig. 4). Interferograms 1 and 2 (Table 1; Fig. 2; Fig. 4a) were created from scenes previously studied in Wicks’ 2011 paper.  Interferogram 1 (Table 1; Fig. 2) shows ground deformation south of Wooded Island.  The deformation spans ~3 km in the east-west direction.  A horizontal profile cut through this section (Fig. 5) shows that there was a maximum subsidence of ~7 mm in the line-of-sight direction.  Interferogram 4 (Table 1; Fig. 4c), which spans full time period of my research, shows evidence of atmospheric effects over the Hanford Site but no deformation that matches with the earthquake locations.  There may be a small amount of deformation in interferogram 2 (Table 1; Fig. 4a), however it shares a slave scene with interferogram 5 (Table 1; Fig. 4d), which shows extensive atmospheric effects in the same area.  The remaining interferograms fall within the master and slave dates of interferogram 4 and also display no definite signs of ground deformation.
+I observed some ground deformation in interferogram 1 and 3 that coincides with the location of one of Hanford’s tank farms (Fig. 6). Horizontal profiles reveal line-of-sight vertical subsidence of ~3 mm and ~2 mm respectively. The displacement is concentrated entirely to the location of the tank farm facility.
+No observations were made of seasonal variations in groundwater or changes in irrigation practices because of phase decorrelation over the farmland areas east of Hanford.  Interferogram 3 (Fig. 4b) does show phase differences over the farm areas, I could not differentiate between ground displacement and artifacts in the interferogram without more information.  In this interferogram (Fig. 4b), yellow marks areas of potential uplift and pink marks areas of subsidence.
 ====Discussion====
 ====Conclusions====

mika/report.txt · Last modified: 2014/12/10 19:12 by usherm42

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