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EVAPOTRANSPIRATION STUDIES FOR VISHNUPURI IRRIGATION PROJECT
Knowledge of the exact amount of water required by different crops in a given set of climatic conditions of region is of great help for planning of irrigation schemes, irrigation scheduling and also for mid term planning in case of mid season drought. The objective of the present study is to identify a suitable method for estimating reference evapotranspiration, ETo and its effect on irrigation water requirement for the typical location of Shri Shankarraoji Chavan Vishnupuri Irrigation Project canal, Nanded in the Marathwada region of Maharashtra State. In department level irrigation planning of canal for the present case study, FAO modified Penman method has been used for estimation of ETo. As this method was found to frequently overestimate ETo, FAO has recommended the use of Penman-Monteith method which is now generally considered as the standard method. Further interrelationship among frequently used methods for estimation of ETo is developed with modified Penman method and FAO Penman-Monteith method from the available climatic data. It is found that FAO Penman-Monteith method gives average 32.15% lower value of ET than that by modified Penman method. In the absence of adequate climatic data for Penman- Monteith method, modified Penman method has been found to be more suitable than other methods.
EVAPOTRANSPIRATION STUDIES FOR VISHNUPURI IRRIGATION PROJECT
Knowledge of the exact amount of water required by different crops in a given set of climatic conditions of region is of great help for planning of irrigation schemes, irrigation scheduling and also for mid term planning in case of mid season drought. The objective of the present study is to identify a suitable method for estimating reference evapotranspiration, ETo and its effect on irrigation water requirement for the typical location of Shri Shankarraoji Chavan Vishnupuri Irrigation Project canal, Nanded in the Marathwada region of Maharashtra State. In department level irrigation planning of canal for the present case study, FAO modified Penman method has been used for estimation of ETo. As this method was found to frequently overestimate ETo, FAO has recommended the use of Penman-Monteith method which is now generally considered as the standard method. Further interrelationship among frequently used methods for estimation of ETo is developed with modified Penman method and FAO Penman-Monteith method from the available climatic data. It is found that FAO Penman-Monteith method gives average 32.15% lower value of ET than that by modified Penman method. In the absence of adequate climatic data for Penman- Monteith method, modified Penman method has been found to be more suitable than other methods.
EVAPOTRANSPIRATION STUDIES FOR VISHNUPURI IRRIGATION PROJECT
Waikar, M. L. (author) / Dhoot, S. A. (author)
ISH Journal of Hydraulic Engineering ; 11 ; 132-145
2005-01-01
14 pages
Article (Journal)
Electronic Resource
Unknown
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