Good evening Gurcharan Sir, Usha Di, Pankaj Ji As Usha Di said, it is a simple means of irrigation without any carbon footprint, specially employed in those older days when there was no pump, deep or shallow submersibles.
But, there is another DONGA, DONGA-BOAT<http://www.flickr.com/photos/66904750@N04/6302382337/>, to carry a person or two in water logged area or lowland or marsh. DONGA works as a class-I lever<http://en.wikipedia.org/wiki/Lever#Classes_of_levers>, rather i would say, it is a combination of two levers. The one is the bamboo frame which works as a seesaw, one end is tied (with a piece of rope or another small piece of slim bamboo stick) to the far end of the elongated boat like structure made out of galvanized metal sheet (iron or tin or an alloy). The other end of the long bamboo culm is either attached with a heavy weight (wet sand bag, not seen in the photo) to act as an " effort <http://en.wikipedia.org/wiki/File:Lever_(PSF).png>", or a person (in this case we need two persons to operate this simple machine) to exert "effort" on this end. The second lever is the elongated boat like metal container where the ground itself acts as fulcrum. The close end of this "boat" is immersed into the water and then it is raised to make water flow down the channel shown in the fourth photo. To give firm support to this metal boat cross iron rods are soldered along its length (thereby, the ladder like appearance). Long live the DONGA of West Bengal !!! Regards, surajit On Sun, Jan 27, 2013 at 4:50 PM, Ushadi Micromini <[email protected] > wrote: > Pankaj > anytime I can give you some faltu information call on me > ha ha... > > wont help your dissertation or papers for Orchids > but will broaden the horizons !!!! > > :)) > > Usha di > > On Sun, Jan 27, 2013 at 4:46 PM, Pankaj Kumar <[email protected]>wrote: > >> Ok yes, it might be meant for collecting water then pulling up with >> the help of bamboos to move water on the field. >> Thanks for enlightenment :) >> Pankaj >> >> >> On Sun, Jan 27, 2013 at 7:13 PM, Ushadi Micromini >> <[email protected]> wrote: >> > I dont think its for crossing the canal or the puddle, >> > >> > its for irrigation, the other/fard end should also be in water, the >> bamboo >> > end on the top gets pulled down by humans or animals that walk away from >> > that pole, and the metallic ???ladder?/ pulls water up and dumps it in >> the >> > ditch near the veggies growing in the filed.... >> > >> > Its not a foot bridge, I dont think >> > unless Surajit says otherwise.. >> > >> > >> > So tell us what is it? Surajit.. >> > Usha di >> > >> > On Sun, Jan 27, 2013 at 4:35 PM, Dr Pankaj Kumar < >> [email protected]> >> > wrote: >> >> >> >> Thats cute. I imagine thats a metallic thing, but why it is open on the >> >> other end. >> >> I had similar experience and to add to it, I can't swim. >> >> One of the most risky but funniest experience was when me and Dr. Jana >> >> Sckornikova crossed a flooded river on foot with our bags raised high >> above >> >> our head as we had our photographic equipment. Obviously we were >> totally >> >> drenched. But it was memorable. She only said, "YOU ORCHID GUY MADE >> THIS >> >> GINGER GIRL WET".....On that day we found some interesting orchids and >> >> ofcourse 3 Curcumas for Jana. >> >> She is one of the toughest taxonomist I have ever known. We even slept >> on >> >> railway platform in Bilaspur during one of our summer trips to >> Achanakumar >> >> Tiger reserve. We found the true Curcuma angustifolia, and >> unfortunately, >> >> only one orchid during that trip in Chattishgarh !!! >> >> >> >> >> >> >> >> >> >> On Sunday, 27 January 2013 02:12:29 UTC+8, surajitkoley wrote: >> >>> >> >>> Sir, >> >>> >> >>> After a long time i see this and i cannot help but share it with you. >> >>> >> >>> Thank you, >> >>> >> >>> Regards, >> >>> >> >>> surajit >> >>> >> >> -- >> >> >> >> >> >> >> > >> > >> > >> > >> > -- >> > Usha di >> > =========== >> >> >> >> -- >> ********************************************************************** >> "Taxonomists getting Extinct and Species Data Deficient !!" >> >> Pankaj Kumar, Ph.D. >> Conservation Officer >> >> Office: >> Orchid Conservation Section >> Flora Conservation Department >> Kadoorie Farm and Botanic Garden (KFBG) Corporation >> Lam Kam Road, Tai Po, New Territories, Hong Kong. >> >> Residence: >> 151, 1st Floor, Tai Om Tsuen >> Tai Po, New Territories, Hong Kong. >> >> email: [email protected]; [email protected]; >> [email protected] >> Phone: +852 2483 7128 (office - 8:30am to 5:00pm); +852 9436 6251 >> (mobile). Fax: +852 2483 7194 >> > > > > -- > Usha di > =========== > > -- > > > > --
