Thursday, August 16, 2012

The good and bad news : El Nino is around.

 

It is now official that El Nino conditions will prevail over the the northern hemisphere at least until Nov2012 and it is widely speculated that this will lead to a shortfall in rainfall in India even as the south westerly monsoon slowly withdraws from the sub-continent.
As if to prove this point, we are experiencing extraordinary weather in this part of world with rainfall again running woefully short in Aug2012 (we had deficient rain in May & Jun2012) and with no major weather system (ie formation of low pressure/depression or cyclone) developing in the Bay of Bengal thus far in 2012.
Whereas this maybe good news as regards landslides in this region (we had no major landslides or casualties except for the Tindharia and Pagla Jhora slides), I shudder to think of what it portends for our drinking water and power situation in the summer of 2013 (not to mention impact on agri/horticulture over the winter months etc).

Praful Rao

Degrees of Thirst
Created by: www.OnlineAssociatesDegree.com

Friday, August 3, 2012

Rainfall stats, Darjeeling district :July2012

As usual Kurseong took the first place with a whopping 125cm of rainfall, whereas at both Darjeeling and Kalimpong the rainfall was more subdued.
No major landslide was reported in July2012 in this region and there were no fatalities

Praful Rao

Sunday, July 29, 2012

"The times, they are a changin" - extreme weather-related events in the past week


  • Large parts of India are reporting deficient rainfall even as July2012 (our rainiest monsoon month) is ending- as such the spectre of drought looms large over many parts of the country (see top map- source http://www.imd.gov.in/section/hydro/dynamic/seasonal-rainfall.htm).
  • The bread basket of the US reels under severe drought conditions (see bottom map - source http://droughtmonitor.unl.edu/).
  • In the week beginning 21July2012, 77 people died due to flooding in Beijing in the heaviest rainfall recorded since record keeping began 60yrs ago.
  • NASA reports "strange and sudden massive melt in Greenland" when the ice melt area went from 40 percent of the ice sheet to 97 percent in four days. You can read about it here
Praful Rao

Monday, July 23, 2012

100mm of rainfall & World Heritage site in peril : Tindharia (19July2012)


STH has covered the Tindharia landslides earlier (see here and here). On 19July2012 following approximately 100mm of rainfall (as per our ARG at Kurseong), a portion of the ground adjacent to the workshop collapsed endangering the famous 100yr old Darjeeling Himalayan Railway workshop located at Tindharia.


BRIEF HISTORY OF THE DARJEELING HIMALAYAN RAILWAY WORKSHOP AT TINDHARIA (KURSEONG)


The construction work including rail track of Darjeeling Himalayan Railways started in May 1879 and completed from Siliguri to Tindharia in 1880. The Governor General of India, Mr. Lord Litton inaugurated the train running in March 1880. Narrow Gauge train was operated upto Darjeeling in 1881. A miniature workshop was built at the present location of loco shed TDH in 1881. Tindharia workshop was built temporarily in the last part of the 19th century for maintenance of NG locomotives and carriages and wagons of DHR. Installation of Tindharia workshop at the present location started in 1913. The workshop came into operation in 1925. The total area of the workshop is 6670 sqm, out of which 3810 sq.m. is covered. DHR was initially tagged with NE zone and was subsequently transferred to NF in the year 1958. The world heritage committee at its 23rd session at Marrakesh, Morocco decided to inscribe Darjeeling Himalayan Railway site on the world heritage list. This was done on 26.11.2000 and it has deepened Indian Railways’ commitment towards the preservation of steam heritage on this system.

Photo credit : STH Member Bhushan Chhetri and Mr Kundun Yolmo (Siliguri)

Praful Rao

Tuesday, July 17, 2012

100mm of rainfall,14-15Jul2012 :Images from Kurseong


Despite IMetD stating that Darjeeling district has had normal rainfall, STH's rainfall gauges located at Darjeeling, Kurseong and Kalimpong all show less than normal rainfall for May/June/and till date in July2012.
This is further substantiated by the fact that paddy cultivation which normally takes place in July in Kalimpong is on hold since paddy fields which should be flooded by monsoon rain water by this time, are still dry.
Despite this on 14-15July when we had just 100mm of rainfall over a 12hr period, landslides blocked the National Highway (NH) 31A between Gangtok and Siliguri and Darjeeling was also cut off from Siliguri for some time due to the above slips and not surprisingly the landslides took place along roads which are known to be a major cause of landslides the world over
Top photo : Road near Giddah Pahar in Kurseong
Bottom photo: Vehicles held up on the Pankha Bari Road to Siliguri.

Photo credit :STH member of Kurseong Bhushan Chhetri

Praful Rao

Thursday, July 5, 2012

Picture of the day : Landslide on 05Jul2012 (National Highway 31A)


The National Highway linking Siliguri to Gangtok (NH31A) was blocked for almost 8hrs today by this landslide at Berrik. The highway is being widened by the BRTF (Border Roads Task Force) along the entire path.

photo credits : Kundun Yolmo, Siliguri

Praful Rao

Wednesday, July 4, 2012

Rainfall data Darjeeling district : Jun2012


From the above data, it is evident that where as Kurseong in Darjeeling district received normal rainfall, the towns of Kalimpong and Darjeeling were running deficient in rain for the second consecutive monsoon month. Jaldhaka which is a tiny hamlet in the foothills bordering the Dooars received its heavy quota of rainfall (which it normally does) and Gangtok in Sikkim also reported 40% higher than normal rain.
We have had no major low pressure areas, depressions or cyclones forming in the Bay of Bengal in 2012.
Also no major landslides in the Darjeeling-Sikkim Himalaya in Jun2012.

Praful Rao

Friday, June 15, 2012

All about rainfall (with May 2012 stats)

Monsoon rains 50% below average in second week
The country's crucial monsoon rains were 50 per cent below average in the week to June 13, the weather office said on Thursday, a second week of scant rain and confirmation the four-month season has got off to a slow start.
But crops are not greatly affected by the quantity of rains in these initial stages, with distribution of rainfall in mid-July after the monsoon should cover the entire country more important for their growth.
 The India Meteorological Department (IMD) has forecast average rainfall for the whole June to September season - the third year in a row to avoid a drought.
The monsoon rains are important for farm output and economic growth as about 55 per cent of the south Asian nation's arable land is rain-fed, and the farm sector accounts for about 15 per cent of a nearly $2-trillion economy, Asia's third-biggest.
 The monsoon rains were 36 per cent below average in the first week, reflecting a delay in the arrival of the seasonal rains over south from the usual June 1 start date.
The monsoon rains are important for farm output and economic growth as about 55 per cent of the south Asian nation's arable land is rain-fed, and the farm sector accounts for about 15 per cent of a nearly $2-trillion economy, Asia's third-biggest.
 The monsoon rains were 36 per cent below average in the first week, reflecting a delay in the arrival of the seasonal rains over south from the usual June 1 start date.

Excerpt from Reuters (14Jun2012)

Praful Rao

Thursday, June 14, 2012

From the Telegraph (14Jun2012) - Tindharia landslide on National Highway 55


Siliguri, June 13: The Darjeeling Himalayan Railway is worried that a fresh landslide will topple a portion of the nearly 100-year-old railway workshop perched immediately above a highway stretch that sank at Tindharia last year.
The DHR wheel shop that houses five to six heritage machines sits precariously just 200 metres above the damaged stretch of NH55. Nearly 150 metres of the highway were washed away in a landslide triggered by heavy rain on September 28 last year.
The DHR officials said the machines were too heavy and couldn’t be relocated to another part of the workshop.
“The wheel shop on the right side of the workshop is at the risk of falling over along with machines which are nearly 100 years old. The machines are too heavy and they cannot be shifted. We were hoping that the damaged stretch of the highway would be repaired before monsoon. However, there is no sign of restoration and we fear heavy rainfall may trigger fresh landslides, causing the wheel shop and machines to collapse,” said a DHR official.


Praful Rao

Friday, June 8, 2012

Images from Sikkim (May-June2012)

Rolep (East Sikkim). 7 deaths occurred in this area on
07Jun2012

Landslide at Rolep (East Sikkim) - 07June2012
Flashflood/Landslide in Lachung

A field destroyed in Lachung

Landslide in Lachung (North Sikkim)

Photo credits - Sikkim Express.


Praful Rao