Ecohydrologic modeling of crop evapotranspiration in wheat (Triticum-aestivum) at sub-temperate and sub-humid region of India
Keywords:
crop coefficient, crop evapotranspiration, reference evapotranspiration, lysimeterAbstract
Abstract: Efficient water management of crop requires accurate irrigation scheduling which, in turn, requires the accurate measurement of crop water requirement. Reference evapotranspiration plays an important role for the determination of water requirements for crops and irrigation scheduling. Various models/approaches varying from empirical to physically base distributed are available for the estimation of reference evapotranspiration. This study identified most suitable reference evapotranspiration model for sub-temperate, sub humid agro-climatic condition using climatic and lysimeter data. The Food and Agriculture Organization (FAO) recommended crop coefficient values are modified for the local agro-climatic conditions. The field experiment was conducted in sub-temperate and sub-humid agro-climate of Solan, Himachal Pradesh, India. Actual crop evapotranspiration for different crop growth stages of wheat (Triticum-aestivum) has been obtained from water balance studies using lysimeter set-up. Field observed and computed individual-stage wise crop evapotranspiration values are compared, to identify the most suitable reference evapotranspiration model for computing crop evapotranspiration. Penman Monteith model shows close agreement with observed value with coefficient of determination, standard error estimate and average relative discrepancy values of 0.96, 13.69 and -5.8, respectively. Further, an effort has been made to compare the accuracy of various widely used methods under different climatic conditions. Keywords: crop coefficient, crop evapotranspiration, reference evapotranspiration, lysimeter DOI: 10.3965/j.ijabe.20130604.003 Citation: Kumar R. Ecohydrologic modeling of crop evapotranspiration in wheat (Triticum-aestivum) at sub-temperate and sub-humid region of India. Int J Agric & Biol Eng, 2013; 6(4): 19-26.References
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[2] Kumar R, Jat M K, Shankar V. Methods to estimate reference crop evapotranspiration- A review. Water Science and Technology, 2012; 66 (3): 525-535.
[3] Rasul G. Water requirement of wheat crop in Pakistan. J. Eng. & App. Sci., 1992; (3): 65-79.
[4] Martin. ASCE’s standardized reference evapotranspiration equation. Proc. 4th National. Irrig. Symp., ASAE, Phoenix, AZ, 2000.
[5] Doorenbos J, Pruitt W O. Crop Water Requirements. FAO Irrigation and Drainage Paper 24. FAO, Rome, Italy, 1977; 144.
[6] Chiew F H S, Kamaladasa N N, Malano H M, Mc Mahon T A. Penman-Monteith, FAO-24 reference crop evapotranspiration and class-A pan data in Australia. Agric. Water Manage., 1995; 28: 9-21.
[7] Allen R G. Assessing integrity of weather data for use in reference evapotranspiration estimation. J. Irrig. Drain. Eng., 1996; 122 (2): 97–106.
[8] Dehghani Sanij H, Yamamoto T, Rasiah V. Assessment of evapotranspiration estimation models for use in semi-arid environments. Agric. Water Manage, 2004; 64: 91-106.
[9] Ventura F, Spano D, Duce P, Snyder R L. An evaluation of common evapotranspiration equations. Irrigation Science, 1999; 18: 163-170.
[10] Kashyap P S, Panda R K. Evaluation of evapotranspiration estimation methods and development of crop-coefficients for potato crop in a sub-humid region, Agric. Water Manag., 2001; 50 (1): 9–25.
[11] Irmak S, Irmak A, Jones J W, Howell T A , Jacobs J M, Allen R G, et al. Preicting daily net radiation using minimum climatological data. J. Irrig. Drain. Eng., 2003; 129 (4): 256–269.
[12] Itenfisu D, Elliott R L, Allen R G, Walter I A. Comparison of reference evapotranspiration calculations as part of the ASCE standardization effort. J. Irrig. Drain. Eng., 2003; 129(6): 440-448.
[13] Gavilan P, Lorite I J, Tornero S, Berengena J. Regional calibration of Hargreaves equation for estimation of reference ET in a semiarid environment. Agric. Water Manage., 2006; 81: 257- 281.
[14] Mohawesh O E. Evaluation of evapotranspiration models for estimating daily reference evapotranspiration in arid and semiarid environments. Journal of Plant Soil Environment, 2011; 57 (4): 145–152.
[15] Blaney H F, Criddle, W D. Determining consumptive use and water requirements. USDA, Technical Bull. No., 1962;
1275: 63-65.
[16] Hargreaves G H, Samani Z A. Reference crop evapotranspiration from temperature. Appl. Eng. Agric. Trans. ASAE, 1985; 1(2): 96–99.
[17] Hargreaves G H Allen R. History and evaluation of hargreaves evapotranspiration equation. J. Irrig. Drain Eng., 2003; 129(1): 53–63.
[18] Jensen M E. Water consumption by agricultural plants. Chapter 1. In: T.T. Kozlowski (Ed): Water Deficits and Plant Growth Vol. II (pp 1–22), Academic Press, New York, 1968.
[19] Doorenbos J, Pruitt W O. Guidelines for predicting crop water requirements, Irrigation Drainage Paper No. 24, FAO-ONU, Rome, Italy, 1975; 168.
[20] Burman R D, Nixon P R, Wright J L, Pruitt W O. Water requirements, In: Jensen, M.E. (Ed.), Design of Farm Irrigation Systems, ASAE Mono., Am. Soc. Agric. Eng., St.
Joseph, MI, 1980; 189–232.
[21] Allen R G, Pereira L S, Raes D, Smith M. Crop evapotranspiration – Guidelines for computing crop water requirements – FAO Irrigation and drainage paper 56. Food and Agriculture Organization of the United Nations, Rome, 1998.
[22] Shuttleworth W J. Evaporation: handbook of hydrology, (D. R. Maidment, ed.) McGraw-Hill, New York, 1992.
[23] Hargreaves G H, Samani Z A. Estimating potential evapotranspiration. Tech. Note, J. Irrig. Drain. Eng., 1982; 108(3): 225–230.
[24] Ambrose J R B, Roesch S E. Dynamic estuary model performance. J. Environ. Eng. Div., 1982; 108: 51-57.
[25] Shankar V. Modelling of moisture uptake by plants. PhD. Dissertation, Department of Civil Engineering, IIT Roorkee, 2007.
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2013-12-25
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Kumar, R. (2013). Ecohydrologic modeling of crop evapotranspiration in wheat (Triticum-aestivum) at sub-temperate and sub-humid region of India. International Journal of Agricultural and Biological Engineering, 6(4), 19–26. Retrieved from https://ijabe.migration.pkpps03.publicknowledgeproject.org/index.php/ijabe/article/view/783
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