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Assessment of the Role of Snowmelt in a Flood Event in a Gauged Catchment

1
Department of Earth Sciences, University of Zaragoza, Pedro Cerbuna, 12, 50009 Zaragoza, Spain
2
Department of Mathematics, University of Zaragoza, Pedro Cerbuna, 12, 50009 Zaragoza, Spain
3
Department of Geography and Territorial Planning, University of Zaragoza, Pedro Cerbuna, 12, 50009 Zaragoza, Spain
4
Geological Survey of Spain (IGME), Manuel Lasala 44, 9° B, 50006 Zaragoza, Spain
*
Author to whom correspondence should be addressed.
Water 2019, 11(3), 506; https://doi.org/10.3390/w11030506
Received: 30 December 2018 / Revised: 27 February 2019 / Accepted: 5 March 2019 / Published: 11 March 2019
(This article belongs to the Section Hydrology)
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Abstract

An actual event that happened in the Roncal valley (Spain) is investigated and the results are compared between models with and without snowmelt. A distributed rainfall model is generated with the specific data recorded by the rain gauges of the catchment during the episode. To describe the process of water routing in the hydrological cycle of the basin, a model is used based on combinations of parallel linear reservoirs (PLR model), distribution by the basin, and tip-out into its drainage network configured using a digital terrain model (DTM). This PLR model allows simulation of the different actual reservoirs of the basin, including the snow and the contribution due to its melting which, in the model, depends on the temperature. The PLR model also allows for a water budget of the episode where, in addition to the effective rainfall contribution, the water that comes from the thaw is taken into account. The PLR model also allows determination of the amount of water that exists in the basin before and after the episode, data of great interest. When comparing the simulations with and without taking into account the thawing process, it is evident that the intervention of the snow reservoir has been decisive in causing a flood to occur. View Full-Text
Keywords: availability of water resources; snowmelt; floods; hydrological processes; PLR models; SHEE software availability of water resources; snowmelt; floods; hydrological processes; PLR models; SHEE software
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Mateo-Lázaro, J.; Castillo-Mateo, J.; Sánchez-Navarro, J.Á.; Fuertes-Rodríguez, V.; García-Gil, A.; Edo-Romero, V. Assessment of the Role of Snowmelt in a Flood Event in a Gauged Catchment. Water 2019, 11, 506.

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