All about a sleek, shiny young visitor: Lucans (Odontolabis) gazella(Odontolabis) OR a Oriental Stag beetle

Photo credit : Ms Maya Rao

Last evening this winged visitor literally barged into our home just as it became dark. And each year, around this time, one or two of these stag beetles stray in; they are looking around for a consort, a quick marriage perhaps, then to vanish again for a year or so.

And we feature this wonderful creature in our blog because the stag beetle ALSO is among our vanishing species.
The reason is obvious: human activity.
These creatures literally spend all their lives, whether as beetles or as larvae in damp, warm forests and inside rotting wood or logs and when we remove forests and set fire to our fields, we destroy their habitats. Climate change is another big factor where excessive dry or wet weather can kill the larvae in the soil.
Many of the species are red listed all around the world and have gone extinct in many European countries. I have modified the life cycle drawing of the stag beetle and placed it below:

Praful Rao,
Kalimpong
Darjeeling-Sikkim Himalaya

The New Normal: Extreme Rain (19/20Aug - Kalimpong)

 This image was posted in 'HAZARD ALERTS' our WhatsApp group at around 8.15pm on 19Aug2020

 

Other places of damage

• Topkhana (near CST - ward no 7)
• Upper Gairigaon (Painyun), Algarah.
• Soureni (near Algarah)
  
  

My thanks to all who contributed with the photos and information.

Praful Rao
Kalimpong district
Darjeeling - Sikkim

Reporting an extreme event in the Darjeeling - Sikkim Himalaya (05Aug-06Aug2020)

RAINFALL DATA (24hrs) in Darjeeling- Sikkim -06Aug2020
W Bengal
Kalimpong - 106, Darjeeling - 99.4, Kurseong - 13
Sikkim
Gangtok - 59.2, Khanitar -119.4, Mangan - 104.2, Singhik - 130.8, Gyalsing - 83.6, Damthang - 82
Much of the rain was very high intensity - and came down within a couple of hours

CLOUD IMAGE AND RAINFALL CHARACTERISTICS OF 05/06AUG2020

What is apparent from the above graph and the AWS chart is the intensity of the rainfall - which peaked within hours to an incredible 252mm/hr at Kalimpong resulting in massive volumes of surface runoff from paved areas of urban centres. Videos of torrents of water gushing into residential areas, shops and flooding streets in Darjeeling, Kalimpong and Gangtok went viral. The intensity of the rain was ascribed to vertical buildup of the clouds - reaching well into the stratosphere with cloud top temps being -80 deg C.
While this sort of rainfall data for other towns is not available, similar scales of damage has been widely reported from Darjeeling, Kalimpong and Sikkim.

IMPACT AND DAMAGE FROM THE STORM

WEST BENGAL

Kalimpong suffered a fatality wherein a heavily swollen stream during the downpour in Lamini Gaon, Chota Bhalukhop swept away a 10yr old boy. This area lies in the western face of the Kalimpong ridge line. The body was recovered 3 days later.
A bridge in Dungra village (which lies below the town, on the eastern face of Kalimpong town) was washed away in the deluge

Many subsidences and landslides were reported on NH10 which is a vital link from
Siliguri to Gangtok. Most occurred between Teesta bazar and Coronation bridge.

 

 

SIKKIM - River Rangeet's Rampage 

Rangeet river is the biggest tributary of the Teesta river originating partly in West Sikkim. Older residents of Legship a town on the banks of the river in W Sikkim, recall that the last time the river was in full spate was during the Oct 1968 disaster.

Special thanks to Mr Mukesh Sharma (Kalimpong) for his inputs and photos.

Praful Rao
Kalimpong district
Darjeeling-Sikkim Himalaya

 

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