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MANAGING ROTATIONAL CANAL WATER SUPPLIES ON THE FARM 1
Author(s) -
Tyagi N. K.
Publication year - 1987
Publication title -
jawra journal of the american water resources association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.957
H-Index - 105
eISSN - 1752-1688
pISSN - 1093-474X
DOI - 10.1111/j.1752-1688.1987.tb00823.x
Subject(s) - irrigation , evapotranspiration , water supply , environmental science , irrigation scheduling , agricultural engineering , deficit irrigation , production (economics) , water resources , irrigation management , water resource management , environmental engineering , engineering , agronomy , ecology , macroeconomics , economics , biology
A procedure to determine optimal irrigation scheduling strategies under rotational water delivery systems is presented. The methodology involves integration of water delivery amount and frequency, irrigation management strategies, evapotranspiration sequences and crop‐evapotranspiration‐production functions to arrive at an optimal irrigation strategy. Application of the methodology to a farm in the service area of Western Yamuna Canal (India) where a two‐stage system of rotation, one among the irrigation channels and the other among the farmers, is in vogue, reveals that maximum production is obtained with water application in a rotational manner (RI) rather than with irrigation in every or alternate supply periods. Increase in mean water supply which can be effected through improvement in on‐farm conveyance and application systems, has a greater effect on yield than decrease in variance of the supply. Benefit cost analyses indicates that precision land leveling is more cost effective in increasing water supply as compared to water‐course lining.