Analysing Surface Deformation in Surabaya from Sentinel file• GMTSAR for SAR processing •...

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.

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