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By: Tran Tuan Ngoc Vietnam National Remote Sensing Centre

By: Tran Tuan Ngoc Vietnam National Remote Sensing Centre

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Page 1: By: Tran Tuan Ngoc Vietnam National Remote Sensing Centre

By: Tran Tuan NgocVietnam National Remote Sensing Centre 

Page 2: By: Tran Tuan Ngoc Vietnam National Remote Sensing Centre

CONTENTS

1.

Flood in Vietnam 2.

Sentinel Asia activation for flood 

observation in Vietnam3.

Conclusions and recommendations

Page 3: By: Tran Tuan Ngoc Vietnam National Remote Sensing Centre

FLOODING IN VIETNAM

Vietnam is one of the countries in the world that severely suffered from typhoon;Every year, there are about 10 typhoons coming to Vietnam;Central of  Vietnam is the most effected region by typhoon.In 2009, this area is continuously suffered by two strong typhoons, Ketsana, and Mirinae, which caused huge destruction.

Page 4: By: Tran Tuan Ngoc Vietnam National Remote Sensing Centre

KETSANA TYPHOON IN SEPTEMBER 2009It struck Centre of Vietnam on 29th September 2009Number dead: 163.Number injured: 616.Number of houses collapsed: 21,429.Number of houses with broken roofs: 268,000.Schools damaged: 5,280.Agricultural damage: 35,000 hectares rice paddies,12,000 hectares sugar cane; 3,700 hectares of aquaculture inundated.

Page 5: By: Tran Tuan Ngoc Vietnam National Remote Sensing Centre

MIRINEA TYPHOON IN NOVEMBER 2009Tropical storm Mirinae caused widespread damage in central provinces when it struck centre of Vietnam on 2nd, Nov 2009.Deaths caused: 122.Injured: 145Houses collapsed: 2198Rice paddies flooded: 19,272 haFish and shrimp ponds damaged: 1987 haBoat sunk: 337Total estimated damage: 278,658,000 USD

Page 6: By: Tran Tuan Ngoc Vietnam National Remote Sensing Centre

Pictures of flood

Page 7: By: Tran Tuan Ngoc Vietnam National Remote Sensing Centre

Pictures of flood

Page 8: By: Tran Tuan Ngoc Vietnam National Remote Sensing Centre

Pictures of flood

Page 9: By: Tran Tuan Ngoc Vietnam National Remote Sensing Centre

SENTINEL ASIA ACTIVATION FOR  KETSANA TYPHOON OBSERVATION

Emergency observation request was submitted to Sentinel Asia on 29th, September 2009 by VNRSCResponse was almost immediately as an ALOS PALSAR image in fine mode on 30th, September 2009 were acquired.

Page 10: By: Tran Tuan Ngoc Vietnam National Remote Sensing Centre

Image  foot  print

Page 11: By: Tran Tuan Ngoc Vietnam National Remote Sensing Centre

Rapid Map Making work flow

Page 12: By: Tran Tuan Ngoc Vietnam National Remote Sensing Centre

Flood map  Flood map  over Quang Binh Province

Page 13: By: Tran Tuan Ngoc Vietnam National Remote Sensing Centre

Flood map  over  Quang Binh Province

Page 14: By: Tran Tuan Ngoc Vietnam National Remote Sensing Centre

SENTINEL ASIA ACTIVATION FOR   MIRINAE TYPHOON 

Emergency observation request has been ordered on 3rd, Nov 2009 through ADRC.Response has been made almost immediately ALOS PALSAR in fine modes on 5th,Nov 2009 were provided.Reference data: from 1st, Dec 2008 and 3rd, Mar 2009.

Page 15: By: Tran Tuan Ngoc Vietnam National Remote Sensing Centre

ALOS PALSAR coverage

Page 16: By: Tran Tuan Ngoc Vietnam National Remote Sensing Centre

1st, Dec 2008

Page 17: By: Tran Tuan Ngoc Vietnam National Remote Sensing Centre

3rd, Mar 2009

Page 18: By: Tran Tuan Ngoc Vietnam National Remote Sensing Centre

5th, Nov 2009

Page 19: By: Tran Tuan Ngoc Vietnam National Remote Sensing Centre

Data AnalysisData from 1st, Dec 2008, 3rd, Mar 2009 and 5th Nov 2009 were used for flood analysisClassification of flooded area from 5th, Nov 2009.Making Rapid map 

Page 20: By: Tran Tuan Ngoc Vietnam National Remote Sensing Centre

RGB  Composed

R: 5th, Nov 2009G: 1st, Dec 2008B: 3rd, Mar 2009

Page 21: By: Tran Tuan Ngoc Vietnam National Remote Sensing Centre

Flood map in  Binh

Dinh

province

Page 22: By: Tran Tuan Ngoc Vietnam National Remote Sensing Centre

Flood Rapid map in Binh

Dinh

province

Page 23: By: Tran Tuan Ngoc Vietnam National Remote Sensing Centre

Flood Rapid map in Phu

Yen province

Page 24: By: Tran Tuan Ngoc Vietnam National Remote Sensing Centre

Flood Rapid map in Phu

Yen province

Page 25: By: Tran Tuan Ngoc Vietnam National Remote Sensing Centre

DAM building

Page 26: By: Tran Tuan Ngoc Vietnam National Remote Sensing Centre

Forest lost in Binh dinh province

Page 27: By: Tran Tuan Ngoc Vietnam National Remote Sensing Centre

Forest lost in Phu Yen province

Page 28: By: Tran Tuan Ngoc Vietnam National Remote Sensing Centre

CONCLUSIONSSentinel Asia  responses well to observe the disaster. Normally, only two or three days after activation ,the satellite image acquisition is made;The ALOS PALSAR data provided before and during flood is useful for inundation mapping.Flood map is useful  for understanding overall disaster situation;

Page 29: By: Tran Tuan Ngoc Vietnam National Remote Sensing Centre

RECOMENDATIONS1.

Scan SAR mode is enough for flood map making.

Page 30: By: Tran Tuan Ngoc Vietnam National Remote Sensing Centre

Recommendations2.

To react to the disaster in time, the predicting 

information should be used. For example, incase  of typhoon we can you the meteology

information to activate the Sentinel sooner in  order to get the images over the effected areas in 

time;3.

Technical matter such as low data transfer rate 

is the hinder for delivering data and disaster  map to the end‐users as the EO data  always has 

large size, and it may be difficult to transfer  through the Internet. Hopefully the exploitation 

of WNDS stations can overcome this problem.

Page 31: By: Tran Tuan Ngoc Vietnam National Remote Sensing Centre