Results of a rapid investigation of the Jure landslide site on 5 August 2014

   TwitCount

On 5 August 2014, two experts from ICIMOD joined other teams from the Disaster Preparedness Network-Nepal (DPNET) to conduct a one day field visit to the landslide dam site at Jure for rapid assessment of the landslide, landslide dam, and the newly formed lake. During the field visit, photographs of the landslide, debris flow fan, dam, lakes, and severely affected areas were taken. 

This information was used together with satellite imagery to analyse the situation and develop recommendations for action to respond to the Jure landslide, as well as steps that should be taken to help reduce disaster risk in the future. More details from the rapid investigation are available for download.

Landslide length: 1.26 km (a)

Landslide area: 0.71 km
2
(a)

Dam length: 409 m (a)

Dam width: 106 m (a)

Dam height: 55 m (b)

Estimated volume of dam materials: 6 million m
3
(b)

Lake area: 0.47 km
2
(a)

Lake length: 3 km (a)

Estimated lake volume lake water: 8 million m
3
(b)

Maximum depth of lake: 48 m (b)


Source: (a) ICIMOD based on satellite image data  (b) Department of Water Induced Disaster Prevention (DWIDP), Presentation by Mr SC Amatya

SETTLEMENTS DESTROYED BY THE LANDSLIDE AND DEBRIS FLOW
Tamang tole, Mangkha
Karki tole, Mangkha
Parajuli tole, Mangkha
Newar tole, Mangkha
Jure
Tekanpur VDC

Note: The number of houses in the affected settlements was estimated based on discussions with local people. These numbers must be verified through a detailed study and updates from the Ministry of Home Affairs.

DAMAGE TO INFRASTRUCTURE
Type of infrastructure damaged Number/amount
Arniko Highway (km) 2
Hydropower plant 2 (Sanima and Sunkoshi)
Transmission line Yet to be estimated
Poultry farm 6
High school 1
Resort 1
Community building 1
School bus 1 (Green Boarding School)
Vehicle 15
Shops 25
Cement block factory 1

Source: DDRC-Sindhupalchowk, and discussion with local people. These numbers must be verified through a detailed study and updates from the Ministry of Home Affairs

PEOPLE AND HOUSEHOLDS AFFECTED BY THE LANDSLIDE
VDC Deceased Missing Displaced people Households affected Completely destroyed houses Partially destroyed houses Households under high risk
Ramche 0 8(13) 207 (80) 44(50) 10 18
Mangkha 33 92(97) 195 (102) 44(52) 27 38
Tekanpur 0 23(22) 0 (25) 19(17) 0 0
Dhuskun 0 0(0) 34 (20) 8(9) 0 0
Total 33 123(132) 436 227 115(128) 37 56

Source: DDRC and NRSC (Figures in parentheses are from an NRSC report)


RECOMMENDATIONS

Immediate actions recommended:

  • Bathymetric survey of the lake to estimate accurately the volume of water stored
  • Geophysical survey of the dam to assess stability
  • Hydrological modelling and inundation mapping to identify areas vulnerable to flood
  • Monitoring of hill slope movement and the landslide scar to assess the stability of the landslide and potential for dam formation in the future 
  • Awareness raising among local people in areas downstream identified as vulnerable based on the results of inundation mapping
Long-term actions recommended:
  • Landslide hazard mapping
  • Identification of potential areas of landslide dams
  • Monitoring of critical landslides
  • Awareness raising
  • Preparation of guidelines for infrastructure development

IMAGE GALLERY

For more images click here

The satellite images showing the development of the landslide over a period of 14 years are available here.