Comparison of Gridded and Measured Rainfall Data for Basin-scale Hydrological Studies

Global gridded climatological (GGC) datasets, including precipitation and temperature, are becoming more and more precise, accessible, and common, but the utility of these datasets and their limits for hydrological research are still not well determined. In this paper, we compare the performance of...

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Autores principales:	Muñoz,Enrique, Álvarez,César, Billib,Max, Arumí,José Luis, Rivera,Diego
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2011
Materias:	Flow simulation monthly water balance surface water hydrology water resources
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000300018
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spelling	oai:scielo:S0718-583920110003000182018-10-01Comparison of Gridded and Measured Rainfall Data for Basin-scale Hydrological StudiesMuñoz,EnriqueÁlvarez,CésarBillib,MaxArumí,José LuisRivera,Diego Flow simulation monthly water balance surface water hydrology water resources Global gridded climatological (GGC) datasets, including precipitation and temperature, are becoming more and more precise, accessible, and common, but the utility of these datasets and their limits for hydrological research are still not well determined. In this paper, we compare the performance of two hydrological models that are identical in structure but built with two different inputs: rainfall from rain gauge stations and from a GGC dataset. The objective is to evaluate the utility of gridded datasets in water resource availability studies mainly for hydroelectric and agricultural purposes. The Andean basin of the Laja River, located in south-central Chile, was chosen for this study. It was based on an 18-yr simulation, and it was concluded that i) with gridded climatological datasets in a monthly water balance model, it is possible to reproduce the behavior of an Andean basin with good goodness-of-fit, but with worse results than when using inputs from rain gauges; ii) the amount of rainfall in gridded datasets in the Andean area of the Laja basin is underestimated and damped, an effect which is transferred to the simulated flows; and iii) regarding the main activities in the Laja basin, global gridded datasets are useful for hydrological studies with agricultural purposes prior to a treatment that considers the orographic effect. On the other hand, these datasets are useless for hydroelectric purposes due to the large underestimation of peak flows obtained during the rainy season.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.71 n.3 20112011-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000300018en10.4067/S0718-58392011000300018
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Flow simulation monthly water balance surface water hydrology water resources
spellingShingle	Flow simulation monthly water balance surface water hydrology water resources Muñoz,Enrique Álvarez,César Billib,Max Arumí,José Luis Rivera,Diego Comparison of Gridded and Measured Rainfall Data for Basin-scale Hydrological Studies
description	Global gridded climatological (GGC) datasets, including precipitation and temperature, are becoming more and more precise, accessible, and common, but the utility of these datasets and their limits for hydrological research are still not well determined. In this paper, we compare the performance of two hydrological models that are identical in structure but built with two different inputs: rainfall from rain gauge stations and from a GGC dataset. The objective is to evaluate the utility of gridded datasets in water resource availability studies mainly for hydroelectric and agricultural purposes. The Andean basin of the Laja River, located in south-central Chile, was chosen for this study. It was based on an 18-yr simulation, and it was concluded that i) with gridded climatological datasets in a monthly water balance model, it is possible to reproduce the behavior of an Andean basin with good goodness-of-fit, but with worse results than when using inputs from rain gauges; ii) the amount of rainfall in gridded datasets in the Andean area of the Laja basin is underestimated and damped, an effect which is transferred to the simulated flows; and iii) regarding the main activities in the Laja basin, global gridded datasets are useful for hydrological studies with agricultural purposes prior to a treatment that considers the orographic effect. On the other hand, these datasets are useless for hydroelectric purposes due to the large underestimation of peak flows obtained during the rainy season.
author	Muñoz,Enrique Álvarez,César Billib,Max Arumí,José Luis Rivera,Diego
author_facet	Muñoz,Enrique Álvarez,César Billib,Max Arumí,José Luis Rivera,Diego
author_sort	Muñoz,Enrique
title	Comparison of Gridded and Measured Rainfall Data for Basin-scale Hydrological Studies
title_short	Comparison of Gridded and Measured Rainfall Data for Basin-scale Hydrological Studies
title_full	Comparison of Gridded and Measured Rainfall Data for Basin-scale Hydrological Studies
title_fullStr	Comparison of Gridded and Measured Rainfall Data for Basin-scale Hydrological Studies
title_full_unstemmed	Comparison of Gridded and Measured Rainfall Data for Basin-scale Hydrological Studies
title_sort	comparison of gridded and measured rainfall data for basin-scale hydrological studies
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2011
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000300018
work_keys_str_mv	AT munozenrique comparisonofgriddedandmeasuredrainfalldataforbasinscalehydrologicalstudies AT alvarezcesar comparisonofgriddedandmeasuredrainfalldataforbasinscalehydrologicalstudies AT billibmax comparisonofgriddedandmeasuredrainfalldataforbasinscalehydrologicalstudies AT arumijoseluis comparisonofgriddedandmeasuredrainfalldataforbasinscalehydrologicalstudies AT riveradiego comparisonofgriddedandmeasuredrainfalldataforbasinscalehydrologicalstudies
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Comparison of Gridded and Measured Rainfall Data for Basin-scale Hydrological Studies

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