Disaster mapping by TerraSAR-X data Takashi Nonaka PASCO - - PowerPoint PPT Presentation

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Disaster mapping by TerraSAR-X data Takashi Nonaka PASCO - - PowerPoint PPT Presentation

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Workshop on ! Renovation of Observation of Natural Disasters using High Resolution Satellite Remote Sensing " Disaster mapping by TerraSAR-X data Takashi Nonaka PASCO

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Disaster mapping by TerraSAR-X data

Takashi Nonaka PASCO Corporation

Workshop on !Renovation of Observation of Natural Disasters using High Resolution Satellite Remote Sensing"

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Contents Few examples of the information extracted by TerraSAR-X for; － Mud flood in Hofu region (Yamaguchi) － Cyclone Aila in Bangladesh － Overflow of Kosi River in Nepal

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  • Study Area
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  • ・ Changes of the shapes of the slopes

may affect the changes of 0.

Area 1

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  • ①

① ① ①

・ Deforested area is extracted as a changed area.

Area 2

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  • ・Deforested area and construction from
  • Feb. 10, 2008 to Aug. 13, 2009 affected 0.

Area 3

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Estimated changed areas are the collapsed sides of roads around Makinohara SA and changed forest area.

)* +,))*

)-./0120,)34

Makinohara SA

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Omaezaki-Bay

Composite image created from two TerraSAR-X images

Decreasing Feb. 08＞ Aug. 09 Increasing：Feb. 08＜ Aug. 09

TerraSAR-X image

!"#$% !"#$%

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Disaster mapping example from 2008 to 2009

TerraSAR-X Flooded area estimation Flood 2009/05/05 Flood in northern Brazil TerraSAR-X Flooded area estimation Flood 2009/05/25 Cyclone AILA in Bangladesh TerraSAR-X Flooded area estimation Flood 2008/08/18 Overflow of Kosi River in Nepal TerraSAR-X In-situ observation Landslide 2009/07/23 Mud flood in Hofu region (Yamagchi) TerraSAR-X EROS-B Volcano 2009/02/06

  • Mt. Asama Eruption

TerraSAR-X Change Detection Volcano 2009/02/02～ Sakurajima Eruption TerraSAR-X EROS-B Interpretation In-situ observation Earthquake 2008/06/14 Iwate-Miyagi Nairiku Earthquake TerraSAR-X Flooded area estimation In-situ Observation Flood 2008/08/29 Torrential Rain in Aichi Prefecture 2009/08/11 2008/05/12 Date TerraSAR-X In-situ observation Earthquake Earthquake around Suruga-bay (Shizuoka) TerraSAR-X EROS-B Interpretation Earthquake Great earthquake in Sichuan, China Acquisition or observation Classification Disaster

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＜TerraSAR-X＞ ■Acquisition Date After the disaster Jul. 25, 2009 After the disaster Jul. 26, 2009 ■Acquisition Mode High-resolution SpotLight （5km×10km） Descending High-resolution SpotLight （5km×10km） Ascending ■Product EEC ■Incidence Angle 37.04 degree 39.98 degree ■Spatial Resolution Range1.98m Azimuth1.68m Range1.86m Azimuth1.59m ■Pixel Spacing 0.75m

Mud flood in Hofu region

Acquisition from both direction

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TerraSAR-X image interpretation (1)

Ortho

Infoterra GmbH, Distribution [PASCO]

Ortho

Infoterra GmbH, Distribution [PASCO]

TSX Ascending TSX Descending

beam

  • 1/4,000 (approx.)

Katsusaka region

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TerraSAR-X image interpretation (2)

Ortho Optical image TSX Ascending TSX Descending

Infoterra GmbH, Distribution [PASCO] Infoterra GmbH, Distribution [PASCO]

  • 1/9,000

(approx)

beam

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Interpretation of flooded area in agricultural field

TSX下降軌道

下流部 下流部 下流部 下流部の土石流流下痕が明瞭に判読可

8 At first, agricultural field area was derived using optical airborne sensor, then flooded areas were estimated from the TerraSAR-X image.

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TSX下降軌道

下流部 下流部 下流部 下流部の土石流流下痕が明瞭に判読可

Interpreted flooded area

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Track of Cyclone Aila (May 2009)

ReliefWeb HPより

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Flooded village

boston.com HP

Flood water flows back to the sea as villagers rebuild an embankment at Protap Nagar in Shatkhira, Bangladesh on Sunday, May 31, 2009. (AP Photo/Pavel Rahman) A flooded village is seen in this aerial view taken from an Indian Air Force (IAF) helicopter in the Cyclone-hit area of Patharpatima Island in the Sundarbans delta, about 100 km (62 miles) south of Kolkata, India on May 27, 2009. (REUTERS/Jayanta Shaw)

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Comparison of two images

New acquisition Archive November 19, 2007 June 2, 2009

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Flooded area estimation

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Overflow in Kosi River in Nepal Aug. 2008

Imja Lake Kosi River （Flooded area） Cyclone Aila

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Flooded area estimation in Kosi River

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Summary

8 TerraSAR-X can acquire several images soon after the

  • ccurrence of a big disaster, and the damaged areas can

be extracted to provide the information of rescue operation, and reconstruction works etc. 8 Changed detection using the pair of SAR images showed that the deforested area was also mis-extracted. 8 Methodology to utilize single image after the disaster is necessary for practical uses.

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!Addressing National Land"

8 Overviews of the disaster monitoring using optical airborne data and TerraSAR-X data 8 Japanese case: 9 International case: 6

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