IDENTIFICATION OF SUITABLE METHOD FOR CROP WATER ASSESSMENT BY ESTIMATING EVAPOTRANSPIRATION - A CASE STUDY
Journal Title: International Journal of Agriculture Sciences - Year 2016, Vol 8, Issue 48
Abstract
This paper presents identification of suitable method for assessment of crop water requirements in the agriculture lands at Malaprabha Riverbed, Bagalkot, India (15.8N-75.5E). Climatic data required for assessment are collected for the selected site. In the present investigation, Blaney-Criddle, Christiansen, Hargreaves, Turc and Thornthwaite methods are employed to estimate evapotranspiration and resultant values are compared with standard reference Penman-Monteith estimated values for the said region. The evapotranspiration is obtained for four different seasons and comparative analysis is carried. Turc and Thornthwaite methods resulted in more deviation from reference and Blaney- Criddle, Hargreaves and Christiansen pan evaporation methods derived the results much closer to each other and standard reference. However, Blaney-Criddle method requires only air temperature data for analysis and yields optimum results. In view of this, Blaney-Criddle method is selected as most suitable method for the said location. Further, water requirement of various crops grown in North Karnataka region are assessed by using crop factors
Authors and Affiliations
BASANAGOUDA F. RONAD
Keywords
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