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Estimation and Validation of Actual Evapotranspiration for Wheat Crop Using SEBAL Model over Hisar District, Haryana, India


Affiliations
1 Department of Civil Engineering, K. R. Mangalam University, Gurgaon 122 001, India
2 The Energy and Resources Institute, New Delhi 110 003, India
3 Department of Civil and Environmental Engineering, The Northcap University, Gurgaon 122 017, India
4 Centre for Remote Sensing and Geo-Informatics, Sathyabama University, Chennai 600 119, India
 

Evapotranspiration (ET) is one of the complex, but essential components of the hydrologic cycle. Advances in remote sensing (RS) and geographical information systems (GIS) have enabled us to estimate ET spatially. In the present study, both, RS and GIS tools have been utilized to estimate the actual crop ET by surface energy balance algorithm for land (SEBAL) model using high spatial resolution satellite image Landsat7 ETM+ for Hisar district, Haryana in north India. Previously calibrated and validated SEBAL model with lysimeter data within the same agroclimatic zone were used in the study. Derived actual ET from lysimeter data validated SEBAL method was again validated using Penman-Montieth (PM) method for the study area located in the same agro-climatic zone. Based on the primary and secondary data analysis, it can be inferred that SEBAL ET is the best spatial ET estimation model for Hisar district or regions having similar agro-climatic conditions. Validation of SEBAL ET with ground-observed lysimeter data showed high coefficient of correlation (R2 = 0.91). Validation using the PM method also showed high coefficient of correlation (R2 = 0.835). Other statistical parameters (RMSE = 0.583, NRMSE = 0.236) also showed good agreement between actual SEBAL ETc and PM ETc (crop evapotranspiration). It was also found that any prior knowledge about the crops, their types and cropping seasons is not required for the estimation of actual ET by SEBAL model.

Keywords

Energy Balance Algorithm, Evapotranspiration, Ground Truthing, Remote Sensing, Wheat.
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  • Estimation and Validation of Actual Evapotranspiration for Wheat Crop Using SEBAL Model over Hisar District, Haryana, India

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Authors

Anju Bala
Department of Civil Engineering, K. R. Mangalam University, Gurgaon 122 001, India
Prakashkiran S. Pawar
The Energy and Resources Institute, New Delhi 110 003, India
Anil Kumar Misra
Department of Civil and Environmental Engineering, The Northcap University, Gurgaon 122 017, India
Kishan Singh Rawat
Centre for Remote Sensing and Geo-Informatics, Sathyabama University, Chennai 600 119, India

Abstract


Evapotranspiration (ET) is one of the complex, but essential components of the hydrologic cycle. Advances in remote sensing (RS) and geographical information systems (GIS) have enabled us to estimate ET spatially. In the present study, both, RS and GIS tools have been utilized to estimate the actual crop ET by surface energy balance algorithm for land (SEBAL) model using high spatial resolution satellite image Landsat7 ETM+ for Hisar district, Haryana in north India. Previously calibrated and validated SEBAL model with lysimeter data within the same agroclimatic zone were used in the study. Derived actual ET from lysimeter data validated SEBAL method was again validated using Penman-Montieth (PM) method for the study area located in the same agro-climatic zone. Based on the primary and secondary data analysis, it can be inferred that SEBAL ET is the best spatial ET estimation model for Hisar district or regions having similar agro-climatic conditions. Validation of SEBAL ET with ground-observed lysimeter data showed high coefficient of correlation (R2 = 0.91). Validation using the PM method also showed high coefficient of correlation (R2 = 0.835). Other statistical parameters (RMSE = 0.583, NRMSE = 0.236) also showed good agreement between actual SEBAL ETc and PM ETc (crop evapotranspiration). It was also found that any prior knowledge about the crops, their types and cropping seasons is not required for the estimation of actual ET by SEBAL model.

Keywords


Energy Balance Algorithm, Evapotranspiration, Ground Truthing, Remote Sensing, Wheat.

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DOI: https://doi.org/10.18520/cs%2Fv113%2Fi01%2F134-141