Advisor : Mankar, A. N.Authors : ASOLKAR, SURAJ DNYANDEO.2021-12-122021-12-122022-10-04Citation : ASOLKAR, SURAJ DNYANDEO. (2021). Calibration and validation of AquaCrop model for irrigated wheat crop. Department of Irrigation and Drainage Engg., Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola. M. Tech. 2021. Print. xiii, 75p. (Unpublished).https://krishikosh.egranth.ac.in/handle/1/5810179097Description : The present investigation was conducted at Department of Irrigation and Drainage Engg., Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola during the year 2020-2021 to calibrate and validate AquaCrop model for Irrigated Wheat and to verify the field result with that of validated model.Abstract : Predicting attainable yield under water limiting conditions is an important goal in rainfed agriculture. Proper irrigation planning is not only essential for water saving, but also for yield enhancement and it is possible only when an accurate and reliable decision-making tool has been adopted. AquaCrop is one of the model, extensively used for irrigation planning purposes. To evaluate the performance of the model entitled study “Calibration and Validation of Aquacrop model for Irrigated Wheat Crop” was undertaken with objectives to calibrate and validate the AquaCrop model. AquaCrop model was calibrated using Wheat production data for the period 13th December 2010 to 30th March 2011. The harvest index was observed as 32 % for Wheat. Thus, validation was carried out without any further adjustment to calibrated parameter. The model validated for the period 8th December 2011 to 15th March 2012. Using irrigation level I1 to I4. Two statistical parameters i.e. root mean square error (RMSE) and Nash Sutcliff coefficient of efficiency (R2NS) were used as performance indicator. Results indicated that both statistical parameters were in acceptable limit for both calibration and validation period. Verification of four formulated Irrigation schedules was carried out for the period of 11th December 2012 to 18th March 2013. Simulations were carried out using calibrated model for the formulated schedules. The R2NS value 0.9702 was obtained in the perfect fit limit and RMSE value was observed as 0.8998 q for yield. Highest water use efficiency was recorded for schedule S0 (0.6 IW/CPE) followed by S1 (0.8 IW/CPE) S2 (1.0 IW/CPE) S3 (1.2 IW/CPE) which may be due to lowest water use. Schedule S2 (1.0 IW/CPE) recorded second highest yield with water use efficiency of 0.79, with slightly decrease in water use efficiency i.e. 0.77 for schedule S3 (1.2 IW/CPE) yield was obtained to be highest which is 41.14 q/ha. Therefore S3 (1.2 IW/CPE) should be used for wheat production.EnglishThesis