Dear Baruah, The technical article you sent is very general. It is more about the surroundings than Majuli itself. I have not heard about any geotechnical study of the island itself. I'd like to hear from a geotechnical engineer if it will help in finding a solution. It has been used in places like Venezuela to stabilize cliffs on seashore. Dilip Deka
Sent from my iPhone > On Dec 28, 2015, at 10:41 AM, Sanjib Baruah <[email protected]> wrote: > > > Dear Deka, > > Below is an excerpt from a journal article by Debojyoti Das of Birkbeck > College, University of London. It does not answer your question directly. > But it may be helpful. It may shed some doubt on whether “engineers can come > up with a solution.” There is a debate among experts. > > Hope all is well, > > Sanjib Baruah > > > “Majuli is surrounded by a complex geological structure of sedimentary > formation and tertiary sandstone in the Upper Brahmaputra Valley in > northeastern part of India. The landscape is characterized in geo-tectonic > discourse as vulnerable and particularly susceptible to the tectonic hazards > posed by plate movements and the hydraulic ebb and flow of the Brahmaputra > and its tributaries …… Geologists and hydrologist working for the Brahmaputra > Board argued that the lift of the riverbed following the Assam earthquake > triggered more destructive floods. Before that period, water flow maintained > a relative equilibrium with the natural flow in the tributaries of the > Brahmaputra. However, as embankments were built to protect key settlements > all along the southern side of the Brahmaputra valley, the flow of the river > was squeezed with linear embankment structures that became vulnerable to > breaches from hydraulic pressure and peak discharge during monsoons…. > Structural measures meant to tame the Brahmaputra have had more catastrophic > ecological effects than the physical rise of the riverbed resulting from the > 1950 earthquake.” > > ----- Original Message ----- > From: "Dilip Deka" <[email protected]> > To: "A Mailing list for people interested in Assam from around the world" > <[email protected]> > Sent: Monday, December 28, 2015 11:54:07 AM > Subject: Re: [Assam] Looking for right information > > How much do we know about the geological formation of Majuli? Has there been > a geotechnical study of the island done by taking deep core samples? If there > is rock underneath, there is some hope to salvage the island. Engineers can > come up with a solution. Any comment from geotechnical engineers in Assamnet? > Dilip Deka > Houston, Texas > > Sent from my iPad > >> On Dec 28, 2015, at 9:06 AM, Anna <[email protected]> wrote: >> >> Dear All >> Thanks for all these discussions on Majuli and erosions. The real question >> is whether this is due to man made causes or is part of the natural process? >> If natural, then we should leave it at that. All over the world natural >> changes are happening - creating new islands from volcanic activities as >> well as submerging existing islands with floods, icebergs etc. If >> completely due to our own foolishness then of course there should be >> concern. By the way, native people all over the world such as aborigines in >> Australia, various tribes in Amazon have always lived in harmony with nature >> without harming it. So it is possible to live and let live but none of us >> in this list is equipped to do so as well as these native folks did and are >> continuing to do. I am not sure where do current Majuli inhabitants fall - >> native or with the rest of us? My two cents only. >> >> Wishing you all a very happy 2016! >> Aradhana Baruah Satin >> NJ, USA >> (Originally from Jorhat - across the river from Majuli) >> >> Sent from my iPhone >> >>> On Dec 28, 2015, at 9:19 AM, kamal deka <[email protected]> wrote: >>> >>> True, Isla de Marajo, in the mouth of the Amazon in Brazil, is the >>> real holder of that title. But if Marajo is bigger than Majuli, Majuli >>> is certainly home to far more people: more than 150,000 of them, on >>> something like 500 sq km. And they face a unique and grave problem: >>> the island is being steadily eroded by the Brahmaputra. Just since >>> 1991, half of Majuli has been washed away. This is the problem where >>> everyone should try to put the spotlight on. >>> >>>> On Mon, Dec 28, 2015 at 5:49 AM, Sanjib Baruah <[email protected]> wrote: >>>> >>>> A recent news report in the Telegraph said Majuli was 1,244 square km in >>>> 1950, and is now 650 square km. >>>> >>>> http://www.telegraphindia.com/1151223/jsp/northeast/story_59886.jsp#.VoEftVLBTPM >>>> >>>> I suspect what complicates measurements a bit is that Majuli is not a >>>> single land mass. It has a mainland – where the most of the places we >>>> associate with Majuli, the Xatras, government departments etc are -- and a >>>> large number of chars and chaporis. Officially the island has 34 chaporis. >>>> Some these chaporis are connected to the mainland during the dry months , >>>> but others are permanently separated. >>>> >>>> Sanjib Baruah >>>> >>>> >>>> ----- Original Message ----- >>>> From: "Wahid Saleh - Indiawijzer" <[email protected]> >>>> To: [email protected] >>>> Cc: "Assamnet" <[email protected]> >>>> Sent: Monday, December 28, 2015 5:33:48 AM >>>> Subject: [Assam] Looking for right information >>>> >>>> As an Assamese we proudly say that Majuli is the biggest river-island in >>>> the world. It might have been once upon a time. But due to different >>>> reason every year we are offering a part of Majuli to Brahmaputra. I have >>>> come across information on the internet announcing that Majuli is no >>>> longer the largest river-island in the world. >>>> >>>> >>>> >>>> 1. According to World Island Information Majuli is the 7th largest >>>> river-island in the world >>>> >>>> http://www.worldislandinfo.com/MISINFORMATION.htm >>>> >>>> >>>> >>>> 2. Wikipedia mentions that Marajó island of Brasil is the largest >>>> river-island of the world. >>>> <https://en.wikipedia.org/wiki/Maraj%C3%B3> >>>> https://en.wikipedia.org/wiki/Maraj%C3%B3 >>>> >>>> Marajó is an island located at the mouth of the Amazon River in Brazil. It >>>> is part of the state of Pará. Marajó is the largest fluvial island in the >>>> world, and the second largest island in South America. With a land area of >>>> 40,100 square kilometres (15,500 sq mi) Marajó is comparable in size to >>>> Switzerland. It is approximately 295 kilometres (183 mi) long and 200 >>>> kilometres (120 mi) wide >>>> >>>> This is also mentioned by Britannica. >>>> <http://www.britannica.com/place/Marajo-Island> >>>> http://www.britannica.com/place/Marajo-Island >>>> >>>> >>>> >>>> Greetings, >>>> >>>> Wahid >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> _______________________________________________ >>>> assam mailing list >>>> [email protected] >>>> http://assamnet.org/mailman/listinfo/assam_assamnet.org >>>> >>>> _______________________________________________ >>>> assam mailing list >>>> [email protected] >>>> http://assamnet.org/mailman/listinfo/assam_assamnet.org >>> >>> _______________________________________________ >>> assam mailing list >>> [email protected] >>> http://assamnet.org/mailman/listinfo/assam_assamnet.org >> >> _______________________________________________ >> assam mailing list >> [email protected] >> http://assamnet.org/mailman/listinfo/assam_assamnet.org > > _______________________________________________ > assam mailing list > [email protected] > http://assamnet.org/mailman/listinfo/assam_assamnet.org > > _______________________________________________ > assam mailing list > [email protected] > http://assamnet.org/mailman/listinfo/assam_assamnet.org _______________________________________________ assam mailing list [email protected] http://assamnet.org/mailman/listinfo/assam_assamnet.org
