Monday, August 3, 2020

Landslide Report 2 (Kalimpong) July 2020 - contd

Landslide 4
I was with Prof Indira Lepcha (2nd from L) and a group of Geography Dept Students of North Bengal University in Feb2020 at this site in Lower Chibo area of Kalimpong. At that time the slide near the jhora was much smaller
Toe erosion at the same spot on 27July2020 has caused a much bigger slide now even though the road
is quite intact.
Location: Lower Chibo, Kalimpong
Coordinates: 27°03.077´N 088°26.732´E
Elevation: 923m
Date of Occurrence: 27July2020.
Landslide type: Debris
Size: Large (size of a 3 storey building)
Cause of Landslide: Heavy rainfall and toe erosion
Damage:
No apparent damage but if further slippage occurs the slide may block the jhora, forming a small landslide dam
Rainfall: 06July -109mm, 23Jul - 62.8mm, 27Jul - 88mm

Landslide 5

Location: Chitrey, Kalimpong district
Coordinates: 27°03´51.09"N 088°25´42.20"E
Elevation: 277m
Date of Occurrence: 27July2020.
Landslide type: Debris
Size: Large (size of a 3 storey building)
Cause of Landslide: Heavy rainfall
Damage:  Chitrey lies on NH10 and is where the road bifurcates to Sikkim and Kalimpong. The landslide here was troublesome and active below the road several years ago because of toe erosion by the Chitrey jhora. It has somehow remained dormant.
This slide from above the road was activated on 27Jul and threatens to cut off Kalimpong and SIkkim on NH10.
Rainfall: 06July -109mm, 23Jul - 62.8mm, 27Jul - 88mm

Landslide 6

          Signatures of some of the people of 3rd Mile who are affected by the landslides

Location: Lower Tashiding (3rd Mile) Kalimpong district
Coordinates: Between 27°03.721'N 088°26.214'E  and 27°03.694'N 088°26.346'E 
Elevation:
615m to 687m
Date of Occurrence:
27July2020.
Landslide type:
Debris
Size:
Villagers estimate approx 300m of farmland and populated areas maybe subsiding.
Cause of Landslide:
Erosion during heavy rain by the 6th Mile and Gurudev jhoras (mountain rivulets) which gets charged by the large runoff from urban areas (Kalimpong town) at the crest. This subsidence is not new but has been accelerated by the heavy rains of Jun/Jul2020.
Damage:
As per villagers I talked to, approx 40 homes are affected, along with farmland at the 3rd Mile area are affected. Also State Highway 12 which connects Teesta Bazar to Kalimpong is likely to be affected at the 3rd Mile area due to its proximity to the subsiding areas.
Rainfall: 06July -109mm, 23Jul - 62.8mm, 27Jul - 88mm

Unverified Damage Reports

Praful Rao
Kalimpong district
Darjeeling-Sikkim Himalaya

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