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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/25796
Title: Estimation of evapotranspiration in lesser Himalayas using remote sensing based surface energy balance algorithm
Authors: Nema M.K.
Thakur H.P.
Upreti H.
Jain, S.K.
Mishra P.K.
Thayyen R.J.
Singh P.K.
Jain, Sharad Kumar
Published in: Geocarto International
Abstract: In this study, remote sensing-based algorithm, METRIC is used to estimate evapotranspiration (ET) over a mountainous watershed in the lesser Himalayas in Uttarakhand, India. ET estimates of METRIC are compared with the ET values determined by using FAO Penman-Monteith equation and crop coefficients. In its original form, METRIC underestimated the ET values considerably with mean absolute error (MAE) of 0.95 mm/day. A modification is incorporated in METRIC for better representation of the effect of rainfall on the ET process. The proposed modification estimates ET at the hot pixel using daily rainfall and meteorological data. Using the modification, the MAE is reduced to 0.44 mm/day and underestimation of ET is reduced from 20.9% to 8.4%. This study contributes to the better understanding of ET in the lesser Himalayas of Uttarakhand. It also underlines the importance of accurate assignment of ET to the hot pixel for accurate estimation of ET using METRIC. © 2020, © 2020 Informa UK Limited, trading as Taylor & Francis Group.
Citation: Geocarto International
URI: https://doi.org/10.1080/10106049.2020.1745300
http://repository.iitr.ac.in/handle/123456789/25796
Issue Date: 2020
Publisher: Taylor and Francis Ltd.
Keywords: FAO Penman-Monteith equation
lesser Himalayas
METRIC
remote sensing
ISSN: 10106049
Author Scopus IDs: 57190277995
57216130523
57194794278
57213028603
57201865282
6602973638
57208371734
29767443800
Author Affiliations: Nema, M.K., Water Resources System Division, National Institute of Hydrology, Roorkee, India
Thakur, H.P., Water Resources System Division, National Institute of Hydrology, Roorkee, India
Upreti, H., Water Resources System Division, National Institute of Hydrology, Roorkee, India
Jain, S.K., Water Resources System Division, National Institute of Hydrology, Roorkee, India
Mishra, P.K., Water Resources System Division, National Institute of Hydrology, Roorkee, India
Thayyen, R.J., Water Resources System Division, National Institute of Hydrology, Roorkee, India
Singh, P.K., Water Resources System Division, National Institute of Hydrology, Roorkee, India
Jain, S.K., National Institute of Hydrology, Roorkee, India
Funding Details: 
Corresponding Author: Upreti, H.; Water Resources System Division, India; email: hitsh.upreti@gmail.com
Appears in Collections:Journal Publications [CE]

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