Interacting effects of precipitation and potential evapotranspiration biases on hydrological modeling

Wang, Jiao, Zhuo, Lu, Rico‐Ramirez, Miguel Angel, Abdelhalim, Ahmed and Han, Dawei 2023. Interacting effects of precipitation and potential evapotranspiration biases on hydrological modeling. Water Resources Research 59 (3) , e2022WR033323. 10.1029/2022wr033323

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Abstract

The quality of precipitation (P) and potential evapotranspiration (PET) data greatly affects the hydrological modeling performance. Considerable attention has been paid to identifying the influence of biased P or PET inputs independently. However, few studies have explored the joint interaction of biases in P and PET inputs on hydrological simulations. Here, we investigate the mutual compensation of P and PET biases on the performance of two widely used conceptual hydrological models, the Xinanjiang model and the Probability Distributed Model. P and PET from HYREX (HYdrological Radar EXperiment) and CAMELS‐GB (Catchment Attributes and Meteorology for Large‐sample Studies in Great Britain) data sets are collected over five catchments with varying characteristics in Great Britain. Different biases are added to these original time series to generate 6560 biased input scenarios. The results suggest that there is a certain compensational relationship between the biases in P and PET inputs to reproduce desirable streamflow simulations. A new hydrological proxy named Compensational Interaction Angle (CIA) is identified and found to be stationary with various modeling periods, as well as stable with different hydrological models despite model equifinality. Further, the CIA highly relates to the long‐term climate aridity ratio. The catchments with greater aridity have larger CIAs. This study offers a fresh perspective to analyze the input errors in hydrological modeling. The results can help to better understand P and PET interactions in hydrological modeling, and guide the selection/evaluation/bias‐correction of P and PET data sets for hydrological applications.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Earth and Environmental Sciences
Additional Information:	License information from Publisher: LICENSE 1: URL: http://creativecommons.org/licenses/by/4.0/
Publisher:	Wiley
ISSN:	0043-1397
Date of First Compliant Deposit:	22 March 2023
Date of Acceptance:	28 February 2023
Last Modified:	08 May 2023 08:53
URI:	https://orca.cardiff.ac.uk/id/eprint/157874

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