Floods in Rakhine State, Myanmar

Transcription

1 Floods in Rakhine State, Myanmar Situation Analysis Preliminary Report 25 July 2016 Geneva, Switzerland

2 Report Content 1. Situation Overview Figure 1: Satellite detected water extent by landcover type as of 14 July Flood Water Extent Figure 2: Satellite detected flood water extent intensity by township as of 14 July Population Exposure Figure 3: Total flood affected population aggregated to townships as of 14 July Affected Transport Network Figure 4: Potentially affected roads as of 14 July

3 1. Situation Overview The Monsoon rains since 01 July 2016 triggered flooding and landslides in several areas of Myanmar (including Rakhine, Kachin, Chin, Sagaing, Magway and Bago). The Rakhine State Government reported that 24,306 people were displaced across the four most affected townships: Minbya (13,123), Ann (4,659), Mrauk-U (3,696) and Kyauktaw (2,828 people). As of 15 July, flood waters had begun receding in most areas allowing people to return to their villages. In Rakhine State, the meteorological stations of Kyaukpyu, Sittwe and Kyauktaw recorded heavy rains from 4 to 6 July 2016 as illustrated below: These levels of rains are quite identical to the precipitation recorded in the same period of the previous year, characterised by the occurrence of a similar event. The following report explores the water extent situation of Rakhine State, Myanmar as of 14 th of July

4 The map below illustrates satellite detected water extent by landcover type derived from the landcover map data and analysis of Rakhine State, Myanmar produced by UNITAR UNOSAT in 2015 ( The potential flood water extent was achieved by subtracting the mangrove and paddy areas from the satellite detected water extent Figure 1: Satellite detected water extent by landcover type as of 14 July

5 2. Flood Water Extent Floods in Rakhine State, Myanmar: Situation Analysis Preliminary Report The analysis carried out by UNITAR-UNOSAT, using Sentinel-1 SAR image of 14 July 2016, shows a total satellite detected water extent of ~2,549 Km² corresponding to ~8% of the total area of Rakhine State : ~80 Km² of flood water extent corresponded to ~0.25% of the total area of the State. ~2,469 Km² of mangrove and paddy areas corresponded to ~7.70% of the total area of the State. The areas covered by water at all times are subject to the rising water level during floods events. The table below illustrates the recorded statistics of the township level: Admin boundaries (State/District/ Township) Area of the Units (km²) Satellite Detected Water Extent % Area of mangrove and paddy Area of mangrove and paddy (km²) Area of flooded units (km²) % Area flooded Rakhine Kyaukpyu Ann 6, Kyaukpyu 1, Ramree 1, Maungdaw Buthidaung 2, Maungdaw 1, Mrauk-U Kyauktaw 1, Minbya 3, Mrauk-U 1, Myebon 1, Sittwe Pauktaw Ponnagyun 1, Rathedaung Sittwe Thandwe Toungup 4, Total 31,994 2, Satellite Detected Water Extent Area of mangrove and paddy (km²) Area of flooded units (km²) 3

6 2.1. Figure 2: Satellite detected flood water extent intensity by township as of 14 July

7 3. Population Exposure Floods in Rakhine State, Myanmar: Situation Analysis Preliminary Report The analysis of population exposure, using WorldPop 2015 data, shows that more than 6,500 people were living within the flood areas, and were directly exposed to the flood event in Rakhine State. By including the mangrove and paddy areas, the total potentially exposed population reached ~500,000 people representing ~20% of Rakhine State population. 6,609 Total population living within the flood areas. 504,216 Total potentially exposed population (including population living in areas close to Mangrove and Paddy zones) Admin Boundaries (State/District/ Township) Total Pop (WorldPop) Population living within Mangrove and Paddy areas (WorldPop) Population living within the flood areas (WorldPop) Potentially Affected Population (WorldPop) Rakhine 2,320, ,607 6, ,216 Kyaukpyu 459,960 25, ,769 Ann 143,817 6, ,404 Kyaukpyu 198,351 15, ,678 Ramree 117,792 3, ,687 Maungdaw 112,453 23, ,034 Buthidaung 66,501 11, ,804 Maungdaw 45,952 12, ,230 Mrauk-U 803, ,648 3, ,292 Kyauktaw 207,933 75, ,503 Minbya 203,127 44, ,933 Mrauk-U 228,596 59,517 1,685 61,202 Myebon 163,958 35, ,654 Sittwe 646, ,057 1, ,822 Pauktaw 174,802 78, ,212 Ponnagyun 155,802 52, ,346 Rathedaung 135,039 50, ,245 Sittwe 180,680 44, ,019 Thandwe 297,925 7, ,299 Toungup 137,567 7, ,299 Total 2,320, ,607 6, ,216 5

8 3.1. Figure 3: Total flood affected population aggregated to townships as of 14 July

9 4. Affected Transport Network The analysis of the affected transportation network, using the transportation network data of June 2010, shows that more than 230 Kms of Rakhine State roads were potentially affected as of 14 July 2016: - ~ 60 Km of major roads. - ~172 Km of other types of roads. Admin Boundaries (State/District/ Township) Roads of the unit (km) Major Roads Other Roads Total roads Affected Roads (km) Roads of the unit (km) Affected Roads (km) Roads of the unit (km) Affected Roads (km) Rakhine , Kyaukpyu Ann Kyaukpyu Ramree Maungdaw Buthidaung Maungdaw Mrauk-U Kyauktaw Minbya Mrauk-U Myebon Sittwe Ponnagyun Rathedaung Sittwe Thandwe Toungup Total , Rathedaung, Mrauk-U, Buthidaung, Maungdaw and Minbya townships contain high levels of potentially affected roads (more than 20%). 7

10 4.1. Figure 4: Potentially affected roads as of 14 July

11 The depiction and use of boundaries, geographic names and related data shown here are not warranted to be error-free nor do they imply official endorsement or acceptance by the United Nations. UNOSAT is a program of the United Nations Institute for Training and Research (UNITAR), providing satellite imagery and related geographic information, research and analysis to UN humanitarian and development agencies and their implementing partners. Please send feedback to UNITAR-UNOSAT. UNITAR, Palais des Nations, CH-1211 Geneva 10, Switzerland Telephone: Facsimile: unosat@unitar.org