icrn phw energy cse dte gobar times rwh csestore iep aaeti

Floods in Uttarakhand explained

Date:Jun 25, 2013

The National Remote Sensing Centre under ISRO has released some interesting satellite images that could possibly explain the devastation in Uttarakhand

The before and after pictures below are self-explanatory. The post-flood image on Bhuvan (ISRO'a geoportal) was acquired on 21 June, 2013. Zooming into the Kedar valley area highlights the disturbances and flooding that have occurred north of the region, including the emergence of a new stream (number 3 in the image)  which has cut across a green patch. The water brought down a lot of debris towards Kedarnath and further down into the Mandakini river, causing the major disaster. This is an initial assessment; other parameters such as rainfall data and terrain will need to be examined for further analysis.

Kedar valley's landscape changes


The website of National Remote Sensing Centre has uploaded some relevant satellite images too. The first image (Resourcesat-2 AWiFS Image of June 1, 2013) of the area acquired on June 1, 2013 shows some snow covered areas in the upper reaches of Himalaya. This was well before the rains hit.

Snow indication


The second image (Resourcesat-2 AWiFS Image: June 21, 2013) dated June 21, which was acquired after the event, clearly shows that the area under snow has increased substantially. This suggests that there would have been heavy rainfall in lower areas, including the Kedar valley and other part of Uttarakhand, leading to the floods.


Kedarnath's location



This 3D video of the Himalayan region shows the terrain of Kedar valley. 




It is really a tragedy. Hope all come safe from that flooded area

25 June 2013
Posted by

National Remote Sensing Centre under ISRO has updated the above images with additional information in their website now

25 June 2013
Posted by
Abdul Hakeem

A very trivial study! ICIMOD has a much better analysis with suggestions for the future.

25 June 2013
Posted by
Arup Dasgupta

What is shown in Down to Earth is minimal. One should go to BHUVAN website of NRSC,Hyderabad and the MOSDAC website of SAC, Ahmedabad to get an understanding of the inputs given by ISRO. Infact, MOSDAC has given the forecast of Cloud burst on June 16th with places identified. ISRO has also enabled the satellite phones for helping NDRF. ICIMOD site is good. They have put the inputs from NOAA, and TRMM besides the field photos.

26 June 2013
Posted by

very well explained the whole analysis...nice work

26 June 2013
Posted by
arun chauhan

Excellent analysis on the subject.
Dr.A.Jagadeesh Nellore(AP),India

28 June 2013
Posted by

Very nicely explained.

10 July 2013
Posted by
manoj Jain

very sufficient expaination. But a well reason is differnt from this reason.

24 September 2013
Posted by
anil tiwari

It's very sad news that alot of lives destroyed. My Uttarakhand is almost destroyed. May god bless all people.

sunita ajay

11 February 2014
Posted by

Thanks allot, you explained it very nicely and its makes my project easy over this tragedy.

1 August 2014
Posted by

Post new comment

The content of this field is kept private and will not be shown publicly.
This question is for testing whether you are a human visitor and to prevent automated spam submissions.

(Comments are moderated and will be published only after the site moderator’s approval. Please use a genuine email ID and provide your name. Selected comments may also be used in the ‘Letters’ section of the Down To Earth print edition.)
Follow us ON
Follow grebbo on Twitter    Google Plus  DTE Youtube  rss