Ha Long landslide

Ha Long landslide

LCI : VNM161020844
Main Information
Landslide Name : Ha Long landslide
Latitude : 20°:57':29.91 N
Longitude : 107° :6':10.26 E
Location
City / District : HaLong
Province : QuangNinh
Country : Vietnam
Reporter
Reporter 1 : Doan Loi
Reporter 2 : Quang Lam
Landslide Type
Material : Earth
Movement : Slide
Velocity (mm/sec) : Rapid
Depth (m) : Shallow
Slope (degree) : Gentle
Volume (m³) : Small
Date of Occurence
Date of Occurence : Jul 28, 2015
Other Information
Land Use Source area : Forest, Urban area
Run-out/deposition area : Urban area
Other Activity : -
Triggering Factor : Rainfall
Death(s) & Missing : 8
Houses and other structural damage : 3
Photo of landslide : pt.png
Google earth kmz file : -
Plan of landslide : DJI_0186.JPG
Cross section of landslide : cs.png
Reference (paper/report) : -
Testing graph : ud.JPG
Monitoring graph : slide.png
Video of moving landslides including 3D simulation : -
Description :

On 28 July 2015, around 01:00 local time, a catastrophic landslide occurred at Cao Thang ward, Ha Long city, Quang Ninh province, Vietnam. The landslide claimed 8 lives and destroyed 3 houses. It was the most significant disaster triggered by torrential rains in Vietnam in 2015. Total recorded rainfalls in a number of gauging stations in Quang Ninh province during 26-30 July were historically the highest in the last 40 years . The cumulative rainfall from 19:00, 27 July, until 07:00, 28 July was 296 mm at Bai Chay weather station in Ha Long city. The heavy rain was the main cause of the Ha Long disaster. Ha Long city is located in the center of Quang Ninh province where there is complex and diverse coastal topography including hills, delta, and islands. It is a highly urbanized and rapidly growing city (population 221,580 in 2010). Many of its people live in hilly areas prone to landslides and debris flows. The North and North East are covered by hills, containing the 70% city’s area. Altitude ranges from sea level to 504 m. Ha Long has a tropical coastal climate with two seasons. A summer season lasts from May to October; the winter from November to April. The average annual precipitation is 1800mm with 80 – 85 % of the annual average falling in summer, especially in July and August.