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Analysing SurfaceDeformationinSurabayafromSentinel-1ADatausingDInSAR Method
IraM.Anjasmara, Meiriska Yusfania,AkbarKurniawan,RoniKurniawan,Awalina LCResmi
Presenter Name : Ira Mutiara Anjasmara
Date of Birth : 31 December
Institution : Department of Geomatics Engineering Institut Teknologi Sepuluh Nopember
Education Background : PhD – Geodesy Curtin University, Western Australia
MPhil – Surveying & MappingCurtin University, Western Australia
ST – Teknik GeodesiInstitut Teknologi Bandung
Averaged2006–2009LOSvelocitymapofSumatra,Java,andBali,Indonesia,fromALOSInSAR time-seriesanalysis(Chaussard etal,2013)
Introduction
• SurabayaisthesecondlargestcityinIndonesiathathasbeenpredictedtosuffersurfacedeformation.• ThesurfacedeformationinSurabayaistriggeredbymanyfactorssuchasgroundwaterextraction,loadofinfrastructuresandconstructions,andgeologicconditionofSurabayathatdominatedbyalluvialconsolidation.• ThelocationofSurabayaonthecoastalareaalsocanbeaforcefactorforthesurfacedeformation.
ResearchAims
§ ToexaminethemodelofsurfacedeformationinSurabaya.
§ ToobservetheareasinSurabayathatsufferfromlandsubsidence.
§ ToquantifythesurfacedeformationinSurabay.
Studyarea:SurabayaCity
Surabaya• Location :112,75° E;7,25° S• Area :± 326,36km2
• Population :2.765.487• Mostoftheregionsarelowland,whichisaround3- 6mabovethesealevel.Exceptonthesouthregion,theelevationisupto25- 50mabovethesealevel.
SurabayaAdministrationArea SoilType
Center Alluvial, siltNorth Alluvial and alluvial not volcanic ashEast Alluvial, silt, sand depositsWest Alluvial and not volcanic ash, alluvial not volcanic ashSouth Alluvial and not volcanic ash, silt, sand sediment mud
Methodology• Data:• Sentinel-1ALevel1SLC• DEMSRTM30x30m
• Technique:• Diferrential InterferometrySAR(DInSAR)
• Software :• GMTSARforSARprocessing• GMTforplotting
Sentinel-1AData• Level1– SingleLookComplex
DeformationfromDInSAR method
DataSet
Seriesnumber
Masterimagedate
Slaveimagedate
Baselineperpendicular(m)
Baselineparallel(m)
Baselinetemporal(days)
1 25Mei2015 22Sept2015 27.73 -1.06 120
2 22Sept2015 20Jan2016 24.90 39.59 120
3 20Jan2016 19Mei2016 26.10 2.37 120
4 19Mei2016 16Sept2016 -19.97 1.42 120
TABEL1.Sentinel-1AInterferogram datausedinthisstudy
Results&Findings• Surfacedeformation• May2015toSeptember2015• September2015toJanuary2016• January2016toMay2016• May2016toSeptember2016
• Comparisonoftheresultswithotherstudies
Pair1:May2015– September2015
500
1000
1500
2000
2500
Azi
muth
14000 15000 16000 17000 18000 19000 20000
Range
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
correlation
500
1000
1500
2000
2500
Azi
mu
th
14000 15000 16000 17000 18000 19000 20000
Range
−3.14 −1.57 0.00 1.57 3.14
phase, rad
Pair1:May2015– September2015
500
1000
1500
2000
2500
Azi
mu
th
14000 15000 16000 17000 18000 19000 20000
Range
−5 −4 −3 −2 −1 0 1 2 3 4 5
unwrapped phase, rad
500
1000
1500
2000
2500
Azi
mu
th
14000 15000 16000 17000 18000 19000 20000
Range
−20 −15 −10 −5 0 5 10 15 20
LOS displacement, mm
range decrease
Pair1:May2015– September2015
112˚37'52"
112˚37'52"
112˚42'50"
112˚42'50"
112˚47'49"
112˚47'49"
−7˚18'14" −7˚18'14"
−7˚13'16" −7˚13'16"
0 5km
112˚37'52"
112˚37'52"
112˚42'50"
112˚42'50"
112˚47'49"
112˚47'49"
−7˚18'14" −7˚18'14"
−7˚13'16" −7˚13'16"
0 5km
−25 −20 −15 −10 −5 0 5 10 15 20 25
LOS displacement
mm
Pair1:May2015– September2015
112˚37'52"
112˚37'52"
112˚42'50"
112˚42'50"
112˚47'49"
112˚47'49"
−7˚18'14" −7˚18'14"
−7˚13'16" −7˚13'16"
0 5km
−25 −20 −15 −10 −5 0 5 10 15 20 25
LOS displacement
mm
−20
−15
−10
−5
0
5
10
15
20
Dis
pla
cem
en
t(m
m)
0.0 2.5 5.0 7.5 10.0 12.5 15.0
Distance(km)
−20
−15
−10
−5
0
5
10
15
20
Dis
pla
cem
en
t(m
m)
0.0 2.5 5.0 7.5 10.0 12.5 15.0
Distance(km)
−20
−15
−10
−5
0
5
10
15
20
Dis
pla
cem
en
t(m
m)
0.0 2.5 5.0 7.5 10.0 12.5 15.0
Distance(km)
Pair2:September2015– January2016
500
1000
1500
2000
2500
Azi
mu
th
14000 15000 16000 17000 18000 19000 20000
Range
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
correlation
500
1000
1500
2000
2500
Azi
muth
14000 15000 16000 17000 18000 19000 20000
Range
−3.14 −1.57 0.00 1.57 3.14
phase, rad
Pair2:September2015– January2016
500
1000
1500
2000
2500
Azi
muth
14000 15000 16000 17000 18000 19000 20000
Range
−5 −4 −3 −2 −1 0 1 2 3 4 5
unwrapped phase, rad
500
1000
1500
2000
2500
Azi
mu
th
14000 15000 16000 17000 18000 19000 20000
Range
−20 −15 −10 −5 0 5 10 15 20
LOS displacement, mm
range decrease
Pair2:September2015– January2016
112˚37'52"
112˚37'52"
112˚42'50"
112˚42'50"
112˚47'49"
112˚47'49"
−7˚18'14" −7˚18'14"
−7˚13'16" −7˚13'16"
0 5km
112˚37'52"
112˚37'52"
112˚42'50"
112˚42'50"
112˚47'49"
112˚47'49"
−7˚18'14" −7˚18'14"
−7˚13'16" −7˚13'16"
0 5km
−25 −20 −15 −10 −5 0 5 10 15 20 25
LOS displacement
mm
Pair2:September2015– January2016
112˚37'52"
112˚37'52"
112˚42'50"
112˚42'50"
112˚47'49"
112˚47'49"
−7˚18'14" −7˚18'14"
−7˚13'16" −7˚13'16"
0 5km
−25 −20 −15 −10 −5 0 5 10 15 20 25
LOS displacement
mm
−20
−15
−10
−5
0
5
10
15
20
Dis
pla
cem
en
t(m
m)
0.0 2.5 5.0 7.5 10.0 12.5 15.0
Distance(km)
−20
−15
−10
−5
0
5
10
15
20
Dis
pla
cem
ent(
mm
)
0.0 2.5 5.0 7.5 10.0 12.5 15.0
Distance(km)
−20
−15
−10
−5
0
5
10
15
20
Dis
pla
cem
ent(
mm
)
0.0 2.5 5.0 7.5 10.0 12.5 15.0
Distance(km)
Pair3:January2016– May2016
3500
4000
4500
5000
Azi
mu
th
14000 15000 16000 17000 18000 19000 20000
Range
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
correlation
3500
4000
4500
5000
Azi
mu
th
14000 15000 16000 17000 18000 19000 20000
Range
−3.14 −1.57 0.00 1.57 3.14
phase, rad
Pair3:January2016– May2016
3500
4000
4500
5000
Azi
muth
14000 15000 16000 17000 18000 19000 20000
Range
−5 −4 −3 −2 −1 0 1 2 3 4 5
unwrapped phase, rad
3500
4000
4500
5000
Azi
mu
th
14000 15000 16000 17000 18000 19000 20000
Range
−20 −15 −10 −5 0 5 10 15 20
LOS displacement, mm
range decrease
Pair3:January2016– May2016
112˚37'52"
112˚37'52"
112˚42'50"
112˚42'50"
112˚47'49"
112˚47'49"
−7˚18'14" −7˚18'14"
−7˚13'16" −7˚13'16"
0 5km
112˚37'52"
112˚37'52"
112˚42'50"
112˚42'50"
112˚47'49"
112˚47'49"
−7˚18'14" −7˚18'14"
−7˚13'16" −7˚13'16"
0 5km
−25 −20 −15 −10 −5 0 5 10 15 20 25
LOS displacement
mm
Pair3:January2016– May2016
112˚37'52"
112˚37'52"
112˚42'50"
112˚42'50"
112˚47'49"
112˚47'49"
−7˚18'14" −7˚18'14"
−7˚13'16" −7˚13'16"
0 5km
−25 −20 −15 −10 −5 0 5 10 15 20 25
LOS displacement
mm
−20
−15
−10
−5
0
5
10
15
20
Dis
pla
cem
en
t(m
m)
0.0 2.5 5.0 7.5 10.0 12.5 15.0
Distance(km)
−20
−15
−10
−5
0
5
10
15
20
Dis
pla
cem
ent(
mm
)
0.0 2.5 5.0 7.5 10.0 12.5 15.0
Distance(km)
−20
−15
−10
−5
0
5
10
15
20
Dis
pla
cem
en
t(m
m)
0.0 2.5 5.0 7.5 10.0 12.5 15.0
Distance(km)
Pair4:May2016– September2016
2000
2500
3000
3500
4000
Azi
muth
14000 15000 16000 17000 18000 19000 20000
Range
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
correlation
2000
2500
3000
3500
4000
Azi
mu
th
14000 15000 16000 17000 18000 19000 20000
Range
−3.14 −1.57 0.00 1.57 3.14
phase, rad
Pair4:May2016– September2016
2000
2500
3000
3500
4000
Azi
mu
th
14000 15000 16000 17000 18000 19000 20000
Range
−20 −15 −10 −5 0 5 10 15 20
LOS displacement, mm
range decrease
2000
2500
3000
3500
4000A
zim
uth
14000 15000 16000 17000 18000 19000 20000
Range
−5 −4 −3 −2 −1 0 1 2 3 4 5
unwrapped phase, rad
Pair4:May2016– September2016
112˚37'52"
112˚37'52"
112˚42'50"
112˚42'50"
112˚47'49"
112˚47'49"
−7˚18'14" −7˚18'14"
−7˚13'16" −7˚13'16"
0 5km
112˚37'52"
112˚37'52"
112˚42'50"
112˚42'50"
112˚47'49"
112˚47'49"
−7˚18'14" −7˚18'14"
−7˚13'16" −7˚13'16"
0 5km
−25 −20 −15 −10 −5 0 5 10 15 20 25
LOS displacement
mm
112˚37'52"
112˚37'52"
112˚42'50"
112˚42'50"
112˚47'49"
112˚47'49"
−7˚18'14" −7˚18'14"
−7˚13'16" −7˚13'16"
0 5km
−25 −20 −15 −10 −5 0 5 10 15 20 25
LOS displacement
mm
Pair4:May2016– September2016
−20
−15
−10
−5
0
5
10
15
20
Dis
pla
cem
en
t(m
m)
0.0 2.5 5.0 7.5 10.0 12.5 15.0
Distance(km)
−20
−15
−10
−5
0
5
10
15
20
Dis
pla
cem
en
t(m
m)
0.0 2.5 5.0 7.5 10.0 12.5 15.0
Distance(km)
−20
−15
−10
−5
0
5
10
15
20
Dis
pla
cem
en
t(m
m)
0.0 2.5 5.0 7.5 10.0 12.5 15.0
Distance(km)
DisplacementfromFourDInSAR pairs
112˚37'52"
112˚37'52"
112˚42'50"
112˚42'50"
112˚47'49"
112˚47'49"
−7˚18'14" −7˚18'14"
−7˚13'16" −7˚13'16"
0 5km
−25 −20 −15 −10 −5 0 5 10 15 20 25
LOS displacement
mm
112˚37'52"
112˚37'52"
112˚42'50"
112˚42'50"
112˚47'49"
112˚47'49"
−7˚18'14" −7˚18'14"
−7˚13'16" −7˚13'16"
0 5km
−25 −20 −15 −10 −5 0 5 10 15 20 25
LOS displacement
mm
112˚37'52"
112˚37'52"
112˚42'50"
112˚42'50"
112˚47'49"
112˚47'49"
−7˚18'14" −7˚18'14"
−7˚13'16" −7˚13'16"
0 5km
−25 −20 −15 −10 −5 0 5 10 15 20 25
LOS displacement
mm
112˚37'52"
112˚37'52"
112˚42'50"
112˚42'50"
112˚47'49"
112˚47'49"
−7˚18'14" −7˚18'14"
−7˚13'16" −7˚13'16"
0 5km
−25 −20 −15 −10 −5 0 5 10 15 20 25
LOS displacement
mm
May2015– Sept2015 Sept2015– Jan2016 Jan2016– May2016 May2016– Sept2016
Max: 70.45 mmMin: - 58.57 mmMean: 2.35 mmStd: 16.42 mmRMS: 16.58 mm
Max: 59.49 mmMin: - 51.89 mmMean: - 3.52 mmStd: 11.79 mmRMS: 12.31 mm
Max: 74.21 mmMin: - 71.33 mmMean: 1.54 mmStd: 14.21 mmRMS: 14.29 mm
Max: 50.10 mmMin: - 57.47 mmMean: 0.89 mmStd: 12.22 mmRMS: 12.25 mm
GPSmeasurementpoints
112˚37'52"
112˚37'52"
112˚42'50"
112˚42'50"
112˚47'49"
112˚47'49"
−7˚18'14" −7˚18'14"
−7˚13'16" −7˚13'16"
−7˚08'17" −7˚08'17"
0 5km
1
2
3
4
5
6
7
8
GPS point Location
1 Rungkut2 Kota3 ITS4 Waru5 Sby Barat6 Kenjeran7 Kalianak8 Pasarturi
Hasil LandSubsidencedari dataALOSPALSARtahun 2009-2011(Resmi etal,2016)
Comparisonwithotherstudies
Samplepoint Location
Handoko etal,2011(GPSmeasurement)
Resmi etal,2016(DInSAR ALOSPALSAR) Thisresearch(DInSAR Sentinel-1A)
2007-2010 2009-2011 052015-092015 092015-012016 012016-052016 052016-092016
Verticaldisplacement(mm)
LOSdisplacement(mm) LOSdisplacement(mm)
1 Rungkut -70.53 -51.55 -14.42 1.84 4.84 18.162 Kota -46.54 -50.77 0.72 10.74 -6.73 6.153 ITS 30.54 25.01 0.75 -2.46 3.88 3.554 Waru -5.99 -15.14 -14.16 14.17 5.39 19.455 Sby Barat -0.64 -1.61 10.92 -9.33 -0.11 4.536 Kenjeran 4.94 24.28 22.28 -14.53 -1.76 -4.847 Kalianak 11.96 4.29 10.51 -5.52 -0.39 -5.238 Pasarturi 13.22 14.18 20.12 -6.38 -4.22 1.27
Distributionofgroundwaterwells
112˚37'52"
112˚37'52"
112˚42'50"
112˚42'50"
112˚47'49"
112˚47'49"
−7˚18'14" −7˚18'14"
−7˚13'16" −7˚13'16"
−7˚08'17" −7˚08'17"
0 5km
Conclusion• ThesurfacedeformationinSurabayaoccursintheformofsubsidenceanduplift.• Comparisonwithotherstudiesshowsthatthepatternofsurfacedeformationisnotveryclear.ButitcanbeconfirmedthatthecoastalareaofSurabayasufferfromsubsidencemorethatotherareas.• TheaveragerateofdeformationfromMay2015toSeptember2016isvariesfrom-3.52mm/4monthsto+2.35mm/4months
Recommendations• Toconfirmthefindingsinstudy,comparisonwithmoreaccuratedataisneeded,forexampleGNSSmeasurements.• OtherSARprocessingmethodsuchasPS-InSAR canbeappliedtogainmoreaccuratedeformationrate.• ItwouldbegoodtocheckthegroundwaterextractionoverSurabayaarea.
THANKYOU
