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25 Jun 2018 description
map UNOSAT

This map illustrates satellite-detected surface water extent in the northeastern parts of Bangladesh (Sylhet distric) & India (Assam, Tipura and Mizoram states) using a Sentinel satellite image acquired on the 15 June 2018. The analysis shows an increase of surface waters in Sylhet district (Bangladesh) and Assam state (India). This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to UNITAR-UNOSAT.

20 Jun 2018 description
map UNOSAT

T his ma pillustra tes the evolutionof sa tellite detected wa ters a nd the rela ted wetconditions inthe Cox’s Ba za rMya nma rna tiona ls refugee ca mps loca ted inUkhia Upa zilla ,a s deduced from the a na lysis of twoR a da rsa t-2S potlight ima ges with 0.5m resolutiona cquired on16 J une 2018&23Ma y 2018.T he evolutionof surfa ce wa ters wa s cla ssified intothree cla sses of cha nge:low,modera te a nd high.T his a na lysis shows tha tsome ca mps experienced a lowerincrea se ofwetconditions/surfa ce wa ters, a s ca mp1W a nd ca mp2E.W herea s some ha ve modera telycha nged,a s ca …

19 Jun 2018 description
map UNOSAT

This map illustrates satellite-detected surface water extent in the northeastern part of Bangladesh using a Sentinel-1 satellite image acquired on the 15 June 2018. In the analysed area; about 500,000 ha of lands are likely affected. The population exposure analysis using WorldPop data shows that 3,500,000 people are potentially affected by floods in this analysed zone: ~1,500,000 are located in Sylhet Division and ~1,000,000 in Sumanganj Division and about 35% of the population is leaving within or close to inundated areas.

14 Jun 2018 description
map UNOSAT

This map illustrates satellite-detected surface water extent in Teknaf Upazila, District of Cox's Bazar, Chittagong Division, located in the southeastern part of Bangladesh as detected using a Sentinel-1 satellite image acquired on the 13 June 2018 compared to a Sentinel-1 satelllite image acquired on 22 May 2018. The total analysed area is about 5,000 ha, and about 1600 ha of surface waters could be observed the 13th of June 2018 whereas 1,050 ha were observed on 22 May 2018. The increase of observed surface waters in this area is about 50 %.

23 Aug 2017 description

This map illustrates satellite-detected surface water extent in the central and northern parts of Bangladesh using a Sentinel-1 satellite image acquired on the 22 August 2017. The total analysed area is about 4,284,431 ha. In this analysed area; 1,099,369 ha (39%) of lands are likely affected.

23 Aug 2017 description

This map illustrates satellite-detected surface water extent in the central and southern parts of Bangladesh using a Sentinel-1 satellite image acquired on the 22 August 2017. In the analysed area; 608,747 ha of lands are likely affected. The population exposure analysis using WorldPop data shows that ~6,400,000 people are potentially affected by floods in the analysed zone: ~2,300,000 are located in Chittagong Division and ~2,170,000 in Dhaka Division. This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to UNITAR-UNOSAT.

15 Aug 2017 description
map UNOSAT

This map illustrates satellite-detected surface water extent in the central part of Bangladesh using a Sentinel-1 satellite image acquired on the 12 August 2017 with a total surface of 4,280,650 ha. In this analyzed area; 1,644,983 ha (38%) of lands are likely affected. These lands are are mainly cropland irrigated and rainfed areas and estimated to 1,576,351 ha. The population exposure analysis using WorldPop data shows that ~17,000,000 people are potentially affected by floods in the analysed zone: ~8,400,000 are located in Dhaka Division and ~5,750,000 in Rajshahi Division.

07 Jun 2017 description

This map illustrates satellite-detected possible damaged shelter structures in Kutupalong Refugee Camp, Palong Khali Union and Cox Bazar District, Chittagong Division, Bangladesh. The UNITAR-UNOSAT analysis used Pleiades satellite imagery acquired the 6th and the 7th June 2017 as post-images. The UNITAR-UNOSAT analysis identified 1,105 possible damaged shelter structures within the extent of the camp. Kindly note that the number of possible shelter damaged structures could have been under or overestimated in some areas due to the cloud cover and the delimitation of the camp extent.

07 Jun 2017 description

This map illustrates satellite-detected potentially damaged buildings in Cox?s Bazar Paurashava Union, Chittagong Division, Bangladesh.The UNITAR-UNOSAT analysis used a Pleiades satellite image acquired 01 June 2017 and could identify 451 potentially damaged structures within the extent of Cox?s Bazar Paurashava Union.Kindly note that the number of damaged structures could have been underestimated due to the cloud cover and the characteristics of the image.This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to UNITAR - UNOSAT.

06 Jun 2017 description

This map illustrates satellite-detected potentially affected shelters in Leda refugee camp in Nhilla Union, Cox s Bazar District, and Chittagong Division of Bangladesh. About 18,350 people are registered in this camp. The UNITAR-UNOSAT analysis used a Pleiades satellite image acquired 05 June 2017 and could identify 215 possible damaged shelter structures within the extent of the camp. Kindly note that the number of damaged shelters could have been underestimated as some groups of shelter structures might be identified as one structure.

06 Jun 2017 description

This map illustrates satellite-detected potentially affected shelters in Nayapara refugee camp in Teknaf Union, Cox s Bazar District, and Chittagong Division of Bangladesh. About 12,500 people are registred in this camp. The UNITAR-UNOSAT analysis used a Pleiades satellite image acquired the 05th of June 2017 and could identify 560 possible damaged shelter structures within the extent of the camp.

02 Jun 2017 description

This map illustrates satellite-detected surface water extent around Maheshkhali, Chakaria and Cox’S Bazar Sadar Upazilas in the District of Cox's Bazar, Chittagong Division in the south eastern part of Bangladesh as detected by a TerraS AR -X image acquired on the 1st June 2017. A total of ~20,000 ha of lands seem to be affected with flood waters.

31 May 2017 description

This map illustrates satellite-detected surface water extent in the District of Cox's Bazar, Chittagong Division, located in the southeastern part of Bangladesh after the tropical cyclone Mora-17 using a Sentinel-1 satellite image acquired on the 30 May 2017. A total of 21,000 ha surface waters were observed. In many zones, the affected lands are mainly agricultural. The analysis of this image reveals also that about 225 km of roads mainly tertiary roads seem to be potentially affected. This is a preliminary analysis and has not yet been validated in the field.

31 May 2017 description

This map illustrates the satellite-detected water extent in the District of Chittagong, Chittagong Division, in the southeastern part of Bangladesh after the tropical cyclone Mora-17. The UNITAR-UNOSAT analysis used a Sentinel-1 satellite image acquired on the 30 May 2017 and detected several areas with standing waters. In the district of Chittagong ~4,260 ha are likely flooded and almost 4 km of the local roads seem to be affected. This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to UNITAR - UNOSAT.

30 May 2017 description
infographic UNOSAT

Overview

Mora-17 is a category 1 tropical cyclone which strongly affected the Chittagong Division of Bangladesh. This cyclone originally came from the Indian ocean (Bay of Bengal) at a speed of about 39 km/h. On 30 May 2017, tropical cyclone Mora-17 made landfall first on Cox’s Bazar District and a few hours later in the Chittagong Districts with a maximum sustainable wind speed of 130 km/h. The tropical cyclone is expected to move to the northeast of India in the next few hours however strong winds might still cause floods and mudslides.

29 May 2017 description
infographic UNOSAT

Overview

Mora-17 is a category 1 tropical cyclone moving north, over the Indian ocean (Bay of Bengal) at a speed of about 15 km/h. Tropical cyclone Mora-17 is predicted to approach the Chittagong Division, Bangladesh on 29 May 2017 and to make landfall early morning on Cox’s Bazar and Chittagong Districts on 30 May 2017 with a maximum sustainable wind speed of 150 km/h. The tropical cyclone is then expected to move northern to the Khagrachhari District and latter reach the Sylhet Division (30 May 2017).

15 Aug 2016 description
report UNOSAT

Expansion of Water Extent

This analysis was carried out using two Sentinel-1 SAR images of 30 June, 2016 and 24 July, 2016 over the central and eastern parts of Bangladesh. The analysis showed an expansion of about 75% of the total satellite detected water between the two dates. The total analysed area was approximately 50,000 km².

  • ~ 6,500 Km² of satellite detected waters were observed on 30 June, 2016.

  • ~ 11,500 Km² of satellite detected water were observed on 24 July, 2016.

30 Jul 2016 description
report UNOSAT

Expansion of Water Extent

This analysis was carried out using two Sentinel-1 SAR images of 30 June, 2016 and 24 July, 2016 over the central and eastern parts of Bangladesh. The analysis showed an expansion of about 75% of the total satellite detected water between the two dates. The total analysed area was approximately 50,000 km² .

  • ~ 6,500 Km² of satellite detected waters were observed on 30 June, 2016.

  • ~ 11,500 Km² of satellite detected water were observed on 24 July, 2016.