Page:Indian Journal of Economics Volume 2.djvu/283

 A USTBLIN IRRIGATION of water eyelopean great reservoir wall world both in regard imponnded (oll(re;e, large stones n p to i8 to its height by it. It i.e., cement 15 tons in one of the big dams of the and the volume is constrncted of concrete work with weight, imbedded in it, and it has absorbed The concrete is divided into / and each the resnlt of one day's work, one another so as to break-joint in This gigantic form of a special plant for the over 50,000 tons of cement. T-shaped nnits, which fit into every direction. msonvy construction reqnired pnrpose. Three cblewsys or suspension ropes, slightly less than a quarter of a mile in span, were ntilized to convey concrete and large stones, and to handle the moving plant on the wall; a power honse was built to generate electricity for driving the machinery, and a narrow railway line was constrncted to connect gange the main The whole southern line with the site of tle dam. of the plant and cenent required for tle construction work was snpplied uncertain and risky was also undertaken ders were'afterwards by task of directly invited Government, laying and the_ very the fonndations by the State; bnt ten-' for the completion o[ the work. Character of the Lad The irrigable map, s the one area, shown by shaded lines in the ultimately selected, and it has the following advantages: (a) The soil is of the highest qnsliy and suitability [or irrigated agriculture, (b) The ares is concentrated, thus miniraising the loss by evaporation of surface vater, (c) It is so situaged that the water is .y the losses b ,y (d) The land and is easily supplied b gravitation and pertelation are reduced to a minimum, is situated st the base of foot-hills, in most parts well timbered.