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Current Research in Agricultural Sciences

June 2020, Volume 7, 1, pp 6-14

Penman and Thornwait Equations for Estimating Reference Evapotranspiration Under Semi-Arid Environment

Muhammad Hafeez

,

Allah Bakhsh

,

Abdul Basit

,

Zia Ahmad Chattha

,

Alamgir Akhtar Khan

,

Muhammad Adnan Majeed

,

Fatima Tahira

Muhammad Hafeez 1

Allah Bakhsh 2 Abdul Basit 2 Zia Ahmad Chattha 4
Alamgir Akhtar Khan 5
Muhammad Adnan Majeed 6
Fatima Tahira 7

  1. Department of Agricultural Engineering, Faculty of Agricultural Sciences and Technology, Bahauddin Zakariya University, Multan, Pakistan. 1

  2. Department of Botany, Ghazi University, Dera Ghazi Khan, Pakistan. 2

  3. Faculty of Agricultural Engineering, University of Agriculture, Faisalabad, Pakistan. 4

  4. Department of Agricultural Engineering, MNSUA, Multan, Pakistan. 5

  5. University of Waikato, New Zealand. 6

  6. Department of Mathematics, Institute of Southern Punjab, Multan, Pakistan. 7

Pages: 6-14

DOI: 10.18488/journal.68.2020.71.6.14

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Article History:

Received: 17 January, 2020
Revised: 19 February, 2020
Accepted: 24 March, 2020
Published: 22 April, 2020


Abstract:

The estimation of reference evapotranspiration (ETo) is required for effective development and management of agriculture water systems. In order to define the most accurate method to estimate ETo in semi-arid climatic environment of Faisalabad, Lahore and Peshawar. Penman and Thornwait ETo methods are compared with standard Penman-Monteith (PM) ETo method. The statistical results show that Penman ETo method overestimates PM ETo method in all the semi-arid climatic regions of Faisalabad, Lahore and Peshawar by 34.91%, 39.51% and 30.75%, respectively. The R2 were 0.98, 0.98 and 0.99 at Faisalabad, Lahore and Peshawar weather stations, respectively. The RMSE were 2.47 mm/day, 2.64 mm/day and 2.19 mm/day at Faisalabad, Lahore and Peshawar weather station, respectively. The MBE of -2.41 mm/day, -2.58 mm/day and -2.13 mm/day were noted at Faisalabad, Lahore and Peshawar weather stations, respectively. The statistical result of Thornwait (Th) ETo method as compared with PM ETo method indicates underestimation of ETo in winter season and overestimation of ETo in summer season by 13.81%, 22.43% and 14.54% at Faisalabad, Lahore and Peshawar stations, respectively. The R2 of 0.92, 0.89 and 0.95 were noted at Faisalabad, Lahore and Peshawar weather stations, respectively. The RMSE were 2.14 mm/day, 2.36 mm/day and 1.16 mm/day at Faisalabad, Lahore and Peshawar weather stations, respectively. The MBE were -0.68 mm/day, -1.12 mm/day and 0.61 mm/day at Faisalabad, Lahore and Peshawar weather stations, respectively. Overall, Thornwait method gave better estimation of ETo than Penman ETo method at all the weather stations.
Contribution/ Originality
The main objective of this research is to compare the performance of Penman and Thornwait ETo methods against standard PM ETo method under semi-arid climatic conditions of Lahore, Faisalabad and Peshawar, Pakistan.

Keywords:

Penman, Thornwait, Penman-Monteith, Reference evapotranspiration, Semi-arid, Environment.

Reference:

[1]          Z. A. Chatha, M. Arshad, A. Bakhah, and A. Shakoor, "Statistical analysis for lining the watercourses," Journal of Agricultural Research, vol. 53, pp. 109-118, 2015.

[2]          M. Gocić, S. Motamedi, S. Shamshirband, D. Petković, Ch, S., R. Hashim, and M. Arif, "Soft computing approaches for forecasting reference evapotranspiration," Computers and Electronics in Agriculture, vol. 113, pp. 164-173, 2015.

[3]          H. R. Fooladmand, "Comparing reference evapotranspiration using actual and estimated sunshine hours in south of Iran," African Journal of Agricultural Research, vol. 7, pp. 1164-1169, 2012.

[4]          A. Berti, G. Tardivo, A. Chiaudani, F. Rech, and M. Borin, "Assessing reference evapotranspiration by the Hargreaves method in north-eastern Italy," Agricultural Water Management, vol. 140, pp. 20-25, 2014.

[5]          O. Kisi, "Modeling solar radiation of Mediterranean region in Turkey by using fuzzy genetic approach," Energy, vol. 64, pp. 429-436, 2014.

[6]          A. Majeed, S. Mehmood, K. Sarwar, G. Nabi, and M. A. Kharal, "Assessment of reference evapotranspiration by the hargreaves method in Southern Punjab Pakistan," European Journal of Advances in Engineering and Technology, vol. 4, pp. 64-70, 2017.

[7]          C. Y. Xu and D. Chen, "Comparison of seven models for estimation of evapotranspiration and groundwater recharge using lysimeter measurement data in Germany," Hydrological Processes: An International Journal, vol. 19, pp. 3717-3734, 2005. Available at: https://doi.org/10.1002/hyp.5853.

[8]          M. Valipour, "Study of different climatic conditions to assess the role of solar radiation in reference crop evapotranspiration equations," Archives of Agronomy and Soil Science, vol. 61, pp. 679-694, 2015. Available at: https://doi.org/10.1080/03650340.2014.941823.

[9]          A. H. Azhar and B. Perera, "Evaluation of reference evapotranspiration estimation methods under southeast Australian conditions," Journal of Irrigation and Drainage Engineering, vol. 137, pp. 268-279, 2011. Available at: https://doi.org/10.1061/(asce)ir.1943-4774.0000297.

[10]        V. J. da Silva, H. d. P. Carvalho, C. R. da Silva, R. d. Camargo, and R. Teodoro, "Performance of different methods of estimating the daily reference evapotranspiration in Uberlandia, MG," Bioscience Journal, vol. 27, pp. 95-101, 2011.

[11]        H. Tabari, M. E. Grismer, and S. Trajkovic, "Comparative analysis of 31 reference evapotranspiration methods under humid conditions," Irrigation Science, vol. 31, pp. 107-117, 2013. Available at: https://doi.org/10.1007/s00271-011-0295-z.

[12]        K. C. DeJonge, M. Ahmadi, J. C. Ascough II, and K.-D. Kinzli, "Sensitivity analysis of reference evapotranspiration to sensor accuracy," Computers and Electronics in Agriculture, vol. 110, pp. 176-186, 2015. Available at: https://doi.org/10.1016/j.compag.2014.11.013.

[13]        M. Hafeez and A. A. Khan, "Assessment of Hargreaves and Blaney-Criddle methods to estimate reference evapotranspiration under coastal conditions," American Journal of Science, Engineering and Technology, vol. 3, pp. 65-72, 2018.

[14]        S. Mehdizadeh, H. Saadatnejadgharahassanlou, and J. Behmanesh, "Calibration of hargreaves–samani and priestley–taylor equations in estimating reference evapotranspiration in the Northwest of Iran," Archives of Agronomy and Soil Science, vol. 63, pp. 942-955, 2017. Available at: https://doi.org/10.1080/03650340.2016.1249474.

[15]        R. Yoder, L. O. Odhiambo, and W. C. Wright, "Evaluation of methods for estimating daily reference crop evapotranspiration at a site in the humid southeast United States," Applied Engineering in Agriculture, vol. 21, pp. 197-202, 2005. Available at: https://doi.org/10.13031/2013.18153.

[16]        T. McMahon, M. Peel, L. Lowe, R. Srikanthan, and T. McVicar, "Estimating actual, potential, reference crop and pan evaporation using standard meteorological data: A pragmatic synthesis," Hydrology and Earth System Sciences, vol. 17, pp. 1331-1363, 2013.

[17]        D. Yates and K. Strzepek, "Comparison of models for climate change assessment of river basin runoff," 1994.

[18]        S. Alexandris, R. Stricevic, and S. Petkovic, "Comparative analysis of reference evapotranspiration from the surface of rainfed grass in central Serbia, calculated by six empirical methods against the Penman-Monteith formula," European Water, vol. 21, pp. 17-28, 2008.

[19]        N. N. A. Tukimat, S. Harun, and S. Shahid, "Comparison of different methods in estimating potential evapotranspiration at Muda Irrigation Scheme of Malaysia," Journal of Agriculture and Rural Development in the Tropics and Subtropics (JARTS), vol. 113, pp. 77-85, 2012.

[20]        M. Tahashildar, P. K. Bora, L. I. Ray, and D. Thakuria, "Comparison of different reference evapotranspiration (ET^ sub 0^) models and determination of crop-coefficients of french bean (Phesiolus vulgaris.) in mid hill region of Meghalaya," Journal of Agrometeorology, vol. 19, pp. 233-237, 2017.

[21]        S. Er-Raki, A. Chehbouni, S. Khabba, V. Simonneaux, L. Jarlan, A. Ouldbba, J. Rodriguez, and R. Allen, "Assessment of reference evapotranspiration methods in semi-arid regions: can weather forecast data be used as alternate of ground meteorological parameters?," Journal of Arid Environments, vol. 74, pp. 1587-1596, 2010. Available at: https://doi.org/10.1016/j.jaridenv.2010.07.002.

[22]        B. Bois, P. Pieri, C. V. Leeuwen, and J. P. Gaudillere, "Sensitivity analysis of the penman-monteith evapotranspiration formula and comparison of empirical methods used in viticulture soil water balance," in In XIV International GESCO Viticulture Congress, Geisenheim, Germany, 23-27 August, 2005 Groupe d'Etude des Systemes de COnduite de la vigne (GESCO), 2005, pp. 187-193.

[23]        K. Schneider, B. Ketzer, L. Breuer, K. Vaché, C. Bernhofer, and H.-G. Frede, "Evaluation of evapotranspiration methods for model validation in a semi-arid watershed in northern China," Advances in Geosciences, European Geosciences Union, vol. 11, pp. 37-42, 2007.

[24]        A. Zarei, S. Zare, and A. Parsamehr, "Comparison of several methods to estimate reference evapotranspiration," West African Journal of Applied Ecology, vol. 23, pp. 17-25, 2015.

[25]        L. Turc, "Estimation of irrigation water requirements, potential evapotranspiration: a simple climatic formula evolved up to date," Annales Agronomiques, vol. 12, pp. 13-49, 1961.

[26]        H. Blaney and W. Criddle, "Determining water needs from climatological data," USDA Soil Conservation Service. SOS–TP, USA, vol. 3, pp. 8-9, 1950.

[27]        D. A. Haith and L. L. Shoemaker, "Generalized watershed loading functions for stream flow nutrients," JAWRA Journal of the American Water Resources Association, vol. 23, pp. 471-478, 1987.

[28]        C. W. Thornthwaite, "An approach toward a rational classification of climate," Geographical Review, vol. 38, pp. 55-94, 1948. Available at: https://doi.org/10.2307/210739.

[29]        C. H. B. Priestley and R. Taylor, "On the assessment of surface heat flux and evaporation using large-scale parameters," Monthly Weather Review, vol. 100, pp. 81-92, 1972. Available at: https://doi.org/10.1175/1520-0493(1972)100<0081:otaosh>2.3.co;2.

[30]        R. G. Allen, L. S. Pereira, D. Raes, and M. Smith, "Crop evapotranspiration-Guidelines for computing crop water requirements-FAO Irrigation and drainage paper 56. ," Fao, Rome, vol. 300, p. D05109, 1998.

[31]        T. P. Q. Le, C. Seidler, M. Kändler, and T. B. N. Tran, "Proposed methods for potential evapotranspiration calculation of the Red River basin (North Vietnam)," Hydrological Processes, vol. 26, pp. 2782-2790, 2012. Available at: https://doi.org/10.1002/hyp.8315.

[32]        A. R. Niaghi, A. Majnooni-Heris, D. Z. Haghi, and G. Mahtabi, "Evaluate several potential evapotranspiration methods for regional use in Tabriz, Iran," Journal of Applied Environmental and Biological Sciences, vol. 3, pp. 31-41, 2013.

[33]        F. Ravelli and P. Rota, Monthly frequency maps of reference evapotranspiration and crop water deficits in southern italy. Rome: Irrigation Experimentation Office of the Former Southern Italy Development Agency, 1999.

[34]        S. Irmak, R. Allen, and E. Whitty, "Daily grass and alfalfa-reference evapotranspiration estimates and alfalfa-to-grass evapotranspiration ratios in Florida," Journal of Irrigation and Drainage Engineering, vol. 129, pp. 360-370, 2003. Available at: https://doi.org/10.1061/(asce)0733-9437(2003)129:5(360).

[35]        M. Garcia, D. Raes, R. Allen, and C. Herbas, "Dynamics of reference evapotranspiration in the Bolivian highlands (Altiplano)," Agricultural and Forest Meteorology, vol. 125, pp. 67-82, 2004. Available at: https://doi.org/10.1016/j.agrformet.2004.03.005.

[36]        H. L. Penman, "Vegetation and hydrology," Soil Science, vol. 96, pp. 362-366, 1963.

[37]        K. Djaman, A. B. Balde, A. Sow, B. Muller, S. Irmak, M. K. N’Diaye, B. Manneh, Y. D. Moukoumbi, K. Futakuchi, and K. Saito, "Evaluation of sixteen reference evapotranspiration methods under sahelian conditions in the Senegal River Valley," Journal of Hydrology: Regional studies, vol. 3, pp. 139-159, 2015.

[38]        A. R. Pereira and W. O. Pruitt, "Adaptation of the Thornthwaite scheme for estimating daily reference evapotranspiration," Agricultural Water Management, vol. 66, pp. 251-257, 2004. Available at: https://doi.org/10.1016/j.agwat.2003.11.003.

[39]        S. Trajkovic, M. Gocic, R. Pongracz, J. Bartholy, and M. Milanovic, "Assessment of reference evapotranspiration by regionally calibrated temperature-based equations," KSCE Journal of Civil Engineering, vol. 24, pp. 1020-1027, 2020. Available at: https://doi.org/10.1007/s12205-020-1698-2.

[40]        A. S. Hussein, "Grass ET estimates using Penman-type equations in Central Sudan," Journal of Irrigation and Drainage Engineering, vol. 125, pp. 324-329, 1999. Available at: https://doi.org/10.1061/(asce)0733-9437(1999)125:6(324).

[41]        S. Trajkovic, M. Gocic, R. Pongracz, and J. Bartholy, "Adjustment of Thornthwaite equation for estimating evapotranspiration in Vojvodina," Theoretical and Applied Climatology, vol. 138, pp. 1231-1240, 2019. Available at: https://doi.org/10.1007/s00704-019-02873-1.

[42]        D. Lang, J. Zheng, J. Shi, F. Liao, X. Ma, W. Wang, X. Chen, and M. Zhang, "A comparative study of potential evapotranspiration estimation by eight methods with FAO Penman–Monteith method in southwestern China," Water, vol. 9, pp. 1-18, 2017. Available at: https://doi.org/10.3390/w9100734.

[43]        M. Lakatos, T. Weidinger, L. Hoffmann, Z. Bihari, and Á. Horváth, "Computation of daily Penman–Monteith reference evapotranspiration in the Carpathian Region and comparison with Thornthwaite estimates," Advances in Science and Research, vol. 16, pp. 251-259, 2020. Available at: https://doi.org/10.5194/asr-16-251-2020.

[44]        H. Afzaal, A. A. Farooque, F. Abbas, B. Acharya, and T. Esau, "Computation of evapotranspiration with artificial intelligence for precision water resource management," Applied Sciences, vol. 10, pp. 1-15, 2020. Available at: https://doi.org/10.3390/app10051621.

[45]        M. Gundalia and M. Dholakia, "Modelling daily reference evapotranspiration in middle South Saurashtra region of India for monsoon season using dominant meteorological variables and the FAO-56 Penman-Monteith method," Int. J. of Sustainable Water & Environmental Systems, vol. 8, pp. 101-108, 2016.

[46]        M. E. Moeletsi, S. Walker, and H. Hamandawana, "Comparison of the hargreaves and samani equation and the Thornthwaite equation for estimating dekadal evapotranspiration in the Free State Province, South Africa," Physics and Chemistry of the Earth, Parts A/B/C, vol. 66, pp. 4-15, 2013. Available at: https://doi.org/10.1016/j.pce.2013.08.003.

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Funding:

This study received no specific financial support.

Competing Interests:

The authors declare that they have no competing interests.

Acknowledgement:

The authors would like to thank Pakistan Metrological Department, Lahore and Peshawar for providing the climatic data records used in this research.

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