October 2017 Vietnam tropical depression explained

Tropical Depression 23W
Formed:October 7, 2017
Dissipated:October 10, 2017
Winds:30
Pressure:1000
Winds:30
Pressure:999
Basin:WPac
Year:2017
Fatalities:109 total
Damages:608510000
Areas:Philippines, South China, Vietnam, Laos, Thailand
Ibtracs:2017282N17113
Season:2017 Pacific typhoon season

The October 2017 Vietnam tropical depression, also known officially by its designation as Tropical Depression 23W, was a weak but deadly system that brought torrential rainfall and extreme flooding over northern and central Vietnam in October 2017. The depression formed on October 7, located to the northwest of Luzon, Philippines. The system moved in a general westward direction as it steadily intensified. Despite being forecast to strengthen into a tropical storm, 23W failed to reach this intensity, due to lack of organization as it made landfall in Hà Tĩnh Province on October 10.

Meteorological history

During October 6, the United States Joint Typhoon Warning Center (JTWC) started to monitor a tropical disturbance, that had developed about 1010round=5NaNround=5 to the east of Manila in the Philippines.[1] The system had a broad low level circulation centre, while atmospheric convection associated with the system was displaced to the northeast of the centre.[1] The system was also located within a favourable environment for further slow development, with low to moderate vertical windshear and very warm sea surface temperatures of NaN°C.[1] Over the next couple of days, the disturbance organised slightly, with atmospheric convection to the south of the disturbance improving as it moved westwards.[2] [3] During October 7, the Japan Meteorological Agency (JMA) reported that the disturbance had developed into a tropical depression, before the system passed over the Philippine island of Luzon.[1] [4]

By 10:00 UTC of October 8, the JTWC had issued a Tropical Cyclone Formation Alert,[5] while the JMA had determined that the system had winds of 55 km/h (35 mph).[6] Several hours later, the JTWC began issuing advisories and upgraded the system to a tropical depression, giving the designation of 23W.[7] The JMA followed suit and began issuing advisories three hours later on October 9.[8]

Preparations and impact

Vietnam

Ref
sco"row" style="text-align: left;" Thanh Hoá3.335 trillion[9]
Hoà Bình2.473 trillion[10]
Hanoi1.409 trillion[11]
Ninh Bình1.052 trillion[12]
Sơn La814 billion[13]
Nghe An758 billion[14]
Yen Bai700 billion[15]
Ha Nam277 billion[16]
Thai Binh130 billion[17]
Phu Tho22.8 billion[18]
Other provinces2.1 trillion
Totals:13 trillion[19] [20]
Despite being a weak system, 23W caused severe damage in many provinces across northern Vietnam. Rainfall of 100–150 mm (3.9–5.9 in) was recorded in the northern and central parts of the country, especially in the provinces of Nghệ An and Hà Tĩnh. Many hydroelectric dams and lakes had to be discharged and the Ministry of Industry and Trade established a working group to ensure the safety of 31 hydroelectric lakes.[21] Heavy rainfall contributed to flash flooding, with five people swept away and an additional five injured in the district of Trạm Tấu, Yên Bái Province. Rescuers saved 28 people from the "danger zone".[22] About 740 houses were flooded, with 30 ending up fully destroyed. The authorities mobilized some 2,200 people, including the military, police, Youth Union and civil defense offices, accompanied by a variety of means to search for missing victims, as well as support the people in the area. Moreover, the Red River was forecast to reach water levels of 3–50 cm (1.2–19.7 in).[22]

On October 12, a landslide occurred in a district in Hòa Bình Province, burying four households.[23] The number of flooded houses rose to 16,700. More than 39,300 hectares of crops were damaged along with two dikes. Around 1,200 cattle and roughly 40,000 fowl were either killed or swept away by flooding and landslides.[23] Rainfall in Mai Châu District, Hoà Bình Province, reached 390 mm (15.3 in), while Kim Bôi District, Hoà Bình Province, had a total of 450 mm (17.7 in). In Lương Sơn District, Hoà Bình Province, 13 hectares of rice were damaged along with 97 hectares of other agriculture crops and 7 hectares of fruit trees. 6 km of roads and 4 km of canal were also damaged due to the flooding.[24] The Vietnam Red Cross offered about 250 million ₫ (US$11 thousand) to families affected by a landslide in Phú Cường, Tân Lạc District, Hòa Bình Province.[25]

Losses from damage in Yên Bái Province are estimated at 500 billion ₫ (US$22 million),[26] while Sơn La Province had 59 billion ₫ (US$2.6 million)[27] and Phú Thọ Province had 22.8 billion ₫ (US$1 million).[28] Lương Sơn district, Hoà Bình Province, suffered damage of about 25 billion ₫ (US$1.1 million),[24] and Lạc Sơn District, Hoà Bình Province, suffered damages of about 16 billion ₫ (US$704 thousand).[29] Hoa Binh province had total damages of 46 billion ₫ (US$2.02 million), including 9 billion ₫ (US$396 thousand) from Ky Son.[30] As of October 15, at least 68 people lost their lives; additionally, 30 were injured, and 34 are still missing.[31] Almost half of the dead (26 people) were in Hoà Bình Province.[32] In total, 100 people were killed and damages reached over 13 trillion ₫ (US$572 million).[19] [33]

Thailand

Despite making landfall in Vietnam, 23W triggered severe flooding in Thailand and killed a total of 9 people.[33] As of October 19, damage from flooding estimated at US$30 million.[34]

Humanitarian Response and Relief Efforts

A comprehensive humanitarian response was swiftly mobilized to address the urgent needs of affected communities across northern and central Vietnam. The Vietnam Red Cross, along with various local non-governmental organizations (NGOs) and international aid organizations such as the United Nations Development Programme (UNDP),[35] played a pivotal role in the immediate aftermath, distributing essential supplies such as food, clean water, clothing, and shelter materials to the displaced populations.[36] [37] [38]

See also

External links

Notes and References

  1. Web site: October 6, 2017. Significant Tropical Weather Advisory for the Western and South Pacific Oceans October 6, 2017 06z . United States Joint Typhoon Warning Center .
  2. Web site: October 7, 2017. Significant Tropical Weather Advisory for the Western and South Pacific Oceans October 7, 2017 06z . United States Joint Typhoon Warning Center .
  3. News: Significant Tropical Weather Advisory for the Western and South Pacific Oceans October 7, 2017 06z . United States Joint Typhoon Warning Center. https://archive.today/20240522203717/https://www.webcitation.org/6u4EEmfq6?url=http://gwydir.demon.co.uk/advisories/ABPW10-PGTW_201710072100.htm. October 7, 2017. May 22, 2024. live .
  4. News: WWJP25 Warning and Summary October 7, 2017 00z . October 7, 2017 . Japan Meteorological Agency . May 23, 2024 . October 14, 2017 . https://archive.today/20240523004655/https://www.webcitation.org/6L1P0kBWG?url=http://gwydir.demon.co.uk/advisories/WWJP25-RJTD_201311090600.htm . dead .
  5. Web site: WTPN21 PGTW 081000. https://archive.today/20240522203759/https://www.webcitation.org/6u4EWtzYs?url=http://gwydir.demon.co.uk/advisories/WTPN21-PGTW_201710081000.htm. dead. October 8, 2017. May 22, 2024. Joint Typhoon Warning Center.
  6. News: WWJP25 RJTD 081200. https://archive.today/20240522203638/https://www.webcitation.org/6u4EcZkVS?url=http://gwydir.demon.co.uk/advisories/WWJP25-RJTD_201710081200.htm. dead. October 8, 2017. May 22, 2024. Japan Meteorological Agency.
  7. Web site: Tropical Depression 23W (Twenty-three) Warning Nr 001. https://archive.today/20240522203840/https://www.webcitation.org/6u5q6WIDa?url=http://gwydir.demon.co.uk/advisories/WTPN31-PGTW_201710082100.htm. dead. October 8, 2017. May 22, 2024. Joint Typhoon Warning Center.
  8. News: TD. https://archive.today/20240522203918/https://www.webcitation.org/6u5qCvAtE?url=http://gwydir.demon.co.uk/advisories/WTPQ20-RJTD_201710090000.htm. dead. October 9, 2017. May 22, 2024. Japan Meteorological Agency.
  9. Web site: Thanh Hóa: Giúp đồng bào thiệt hại do lũ sớm ổn định cuộc sống. Thanh Hoa: Helping people with damage caused by flood to stabilize their lives. November 1, 2017. November 1, 2017. Hoàng Minh. Dân Sinh. Ministry of Labour, Invalids and Social Affairs. vi.
  10. Web site: Thiệt hại 2473 tỷ đồng do mưa lũ. Hòa Bình. Damage of 2473 billion VND due to flood. vi. October 20, 2017. October 20, 2017.
  11. Web site: Mưa lũ khiến Hà Nội thiệt hại gần 1.409 tỷ đồng. Hà Nội Mới. Rain floods caused Hanoi damage nearly 1.409 billion VND. vi. November 7, 2017. November 7, 2017. Văn Nhuệ.
  12. Web site: Ninh Bình thiệt hại hơn 1.000 tỷ đồng trong trận lụt lịch sử. Dân Trí. Vietnam Study Encouragement Association. Ninh Binh losses more than 1,000 billion VND in the flood of history. vi. October 23, 2017. November 7, 2017. Thái Bá.
  13. Web site: Sơn La thiệt hại hơn 800 tỷ đồng do mưa lũ. Tài Nguyên Môi Trường. Ministry of Natural Resources and Environment. Son La lost over 800 billion VND due to flood. vi. October 20, 2017. November 7, 2017. Nguyễn Nga.
  14. Web site: 5 ngày mưa lũ cuốn bay hơn 758 tỷ đồng ở Nghệ An. 5 days of torrential rain over 758 billion VND in Nghe An. Nghệ An. N.Khoa. October 19, 2017. vi. November 7, 2017.
  15. Web site: Yên Bái: Thiệt hại trên 700 tỷ đồng do mưa lũ. Yen Bai: Damage over 700 billion VND due to flood. October 17, 2017. November 1, 2017. Thành Nam. Dân Sinh. Ministry of Labour, Invalids and Social Affairs. vi.
  16. Web site: Ngành trồng trọt Hà Nam mất 277 tỷ đồng do mưa lũ. vi. Hà Nam. October 17, 2017. November 1, 2017. Mạnh Hùng. Ha Nam's cultivation costs 277 billion VND due to floods.
  17. Web site: Thái Thụy (Thái Bình) thiệt hại hơn 130 tỷ đồng sau mưa lũ. Thai Thuy (Thai Binh) losses more than 130 billion after flood. Tin Tức Việt Nam. October 17, 2017. October 17, 2017. Trần Tuấn. vi.
  18. Web site: Phú Thọ: Thiệt hại do mưa lũ ước tính trên 22,8 tỷ đồng. Phu Tho: Damage caused by flood is estimated at 22.8 billion VND. Phú Thọ. October 12, 2017. October 12, 2017. vi. October 15, 2017. https://web.archive.org/web/20171015031625/http://baophutho.vn/xa-hoi/201710/phu-tho-thiet-hai-uoc-tinh-tren-228-ty-dong-152983. dead.
  19. Web site: GSO website. https://web.archive.org/web/20171229232254/https://www.gso.gov.vn/default.aspx?tabid=621&ItemID=18668. dead. December 29, 2017. gso.gov.vn.
  20. Web site: Mưa lũ gây nhiều thiệt hại tới sản xuất nông nghiệp trong tháng 10.
  21. Web site: 29 người thiệt mạng trong mưa lũ dồn dập. vi. October 11, 2017. VNExpress. FPT Group. October 11, 2017. 29 dead in torrential rain and floods.
  22. Web site: Lũ dữ tàn phá miền tây Yên Bái, thiệt hại hơn 100 tỷ đồng. vi. October 11, 2017. Tiền Phong. Ho Chi Minh Communist Youth Union. October 11, 2017. Tùng Duy. Rain and floods ravaged western Yên Bái, damage over 100 billion VND.
  23. Web site: 37 dead, 40 missing in landslides, floods in Vietnam. https://web.archive.org/web/20171012054127/http://news.xinhuanet.com/english/2017-10/12/c_136674262.htm. dead. October 12, 2017. October 12, 2017. Xinhua News Agency. October 12, 2017. Hanoi.
  24. Web site: Lương Sơn: Tổng thiệt hại do mưa lũ gây ra khoảng 25 tỷ đồng. vi. October 13, 2017. Hòa Bình. Lương Son: Total damage caused by the flood is about 25 billion VND. October 13, 2017. Trần Trang.
  25. Web site: Trung ương Hội CTĐ Việt Nam hỗ trợ 250 triệu đồng cho các gia đình nạn nhân vụ sạt lở ở Phú Cường. vi. October 12, 2017. Hòa Bình. Central Vietnam Red Cross supports families of victims of landslide in Phú Cường with 250 million VND. October 12, 2017.
  26. Web site: "Tập trung thực hiện mọi biện pháp ổn định đời sống đồng bào vùng lũ". vi. October 14, 2017. Voice of Vietnam. Focus on implementing all measures to stabilize the life of people in flooded areas. Đinh Tuấn. Tây Bắc. October 14, 2017.
  27. Web site: Sơn La thiệt hại hơn 59 tỷ đồng vì mưa lũ . October 12, 2017. October 12, 2017. vi. Voice of Vietnam. Sơn La lost over 59 billion VND due to floods. Thanh Thủy. Tây Bắc.
  28. Web site: Phú Thọ: Thiệt hại do mưa lũ ước tính trên 22,8 tỷ đồng. October 12, 2017. vi. Phú Thọ. October 12, 2017. Phú Thọ: Damage caused by flood in is estimated at 22.8 billion VND. October 15, 2017. https://web.archive.org/web/20171015031625/http://baophutho.vn/xa-hoi/201710/phu-tho-thiet-hai-uoc-tinh-tren-228-ty-dong-152983. dead.
  29. Web site: Lạc Sơn Thiệt hại do mưa lũ ước khoảng 16 tỷ đồng. vi. October 12, 2017. Hòa Bình. Damage in Lạc Sơn due to floods is estimated at 16 billion VND. October 12, 2017. Đinh Thắng.
  30. Web site: Ky Son damages due to rain estimated nearly 9 billion VND. vi . Kỳ Sơn thiệt hại do mưa lũ ước gần 9 tỷ đồng. October 13, 2017. October 13, 2017. Hòa Bình. Đinh Thắng.
  31. Web site: 68 người chết trong mưa lũ, 34 người còn mất tích . 68 people died in the flood, 34 people missing . October 14, 2017 . . . vi . October 15, 2017 . Tuấn Phùng . Chung Thủy.
  32. Web site: Hơn 50 người thiệt mạng do mưa lũ . October 12, 2017 . VNExpress . FPT Group . vi . More than 50 people died of floods . October 12, 2017.
  33. Web site: Global Catastrophe Recap October 2017. thoughtleadership.aonbenfield.com. Aon Benfield. November 9, 2017. November 15, 2017. https://web.archive.org/web/20171115003613/http://thoughtleadership.aonbenfield.com/Documents/20171109-ab-analytics-if-october-global-recap.pdf. dead.
  34. Web site: Annual companion . February 10, 2018 . March 2, 2018 . https://web.archive.org/web/20180302001946/http://thoughtleadership.aonbenfield.com/Documents/20180124-ab-if-annual-companion-volume.pdf . dead .
  35. Web site: Typhoon Damrey Early Recovery Analysis Report: Viet Nam 2017 .
  36. Web site: 2017 Vietnam Post-Typhoon Damrey Rapid Damage and Needs Assessment .
  37. Web site: Vietnam: Flash Floods .
  38. Web site: Viet Nam: Floods .

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