ISBN 9788174090479,Irrigation Engineering & Hydraulic Structures

Irrigation Engineering & Hydraulic Structures



Khanna Publisher


ISBN 9788174090479

ISBN-10 8174090479

Paper Back

Edition 29th
Number of Pages 1265 Pages
Language (English)

Civil Engineering

Irrigation is the science of supplying water to the cultivated land in accordance with the varying requirements of the crops grown therein. Assured irrigation is found to have increased the productivity of unirrigated (rain-fed) land by as much as five times; say from about 0.5 t/ha to about 2.5 t/ha in a tropical country like India, which makes irrigation as an absolute necessity for our country. Although India receives sufficient quantity of about 4000 b.cum of average annual precipitation, resulting in 1869 cum of average annual runoff, yet about 85% of this fresh water supply is received in only four monsoon months, whereas water is required throughout the year, necessitating development of sufficient surface as well as underground storages during rainy season for subsequent uses during lean season. Out of the estimated average annual utilizable flow of 1122 b.cum, the present utilization, however, is only about 630 b.cum; (i/c 200 b.cum of ground water) out of which, about 500 b.cum (i.e. about 80%) is being used for irrigation alone. Even with such a huge percentage of the total utilized water being supplied for irrigation, we are just able to irrigate only about 45% of our gross cropped area of 190 Mha, with a created irrigation potential of about 100 Mha, as against the ultimate potential of 140 Mha, which can be developed with ordinary in-basin storages, without involving inter basin water transfers, which may further help in creating an additional irrigation potential of 35 Mha. Besides minimizing the use of irrigation water by adopting canal linings, sprinkler irrigation and micro-irrigation techniques such as drip irrigation on a large scale, additional waters are still required to be developed (stored) for bringing additional cropped area under irrigation to increase our food and fibre production, to fulfill our growing demands for ever increasing population. The techniques which are deployed for construction of an efficiently functioning irrigation system have been lucidly explained in this popular book. Besides covering irrigation in general, the book covers the Design & Construction of Canals and Canal structures, like Barrages, Canal falls, Canal outlets, Cross-drainage works, Bridges and Culverts, etc.; the Storage Reservoirs and Dams have also been extensively covered. Use of groundwater for irrigation, and development of Hydropower have also be dealt in details. The text matter has been further supported with more than 600 Objective Questions, including those from the various competitive examinations. The prestigious UPSC competitions continue to carry questions from this book year after year.

Table of Contents
Irrigation Techniques & Quality of Irrigation Water Water Requirements of Crops Canal Irrigation System Sediment Transport & Design of Irrigation Channels Lining of Irrigation Canals & Economics of Lining Reclamation of Water-logged & Saline Soils for Agricultural Purposes Irrigation Revenue Rates Rivers, their Behaviour, Control & Training Diversion Head Works Hydraulic Jump and its Usefulness in the Design of Irrigation Structures Theories of Seepage & Design of Weirs & Barrages Canal Falls Regulator, Modules & Miscellaneous Canal Structure Cross Drainage Works Construction of Culverts & Road Bridges across Drains & Canals Using Ground Water for Irrigation through Wells and Tube wells Dams in General and a few Dams in Particular Reservoirs & Planning for Dam Reservoirs Design & Construction of Gravity Dams Earthen Dams & Rock fill Dams Spillways, Energy Dissipaters & Spillway Gates Outlet Works through Dams & River Intakes Pressure Conduits Hydro-electric Power River Navigation Tank Irrigation Arch & Buttress Dams Chapter wise Multichoice Objective Questions Test Paper on Objective Questions Conventional Questions of the Engineering Services Exams. Conventional Questions of the Civil Services Exams. Objective Questions of the Engineering Services Exams Objective Questions of AMIE Exams