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Long-term and event-scale sub-daily streamflow and sediment simulation in a small forested catchment.

Long-term and event-scale sub-daily streamflow and sediment simulation in a small forested catchment.

Authors :
Meaurio, Maite
Zabaleta, Ane
Srinivasan, Raghavan
Sauvage, Sabine
Sánchez-Pérez, José-Miguel
Lechuga-Crespo, Juan Luis
Antiguedad, Iñaki
Source :
Hydrological Sciences Journal/Journal des Sciences Hydrologiques. Apr2021, Vol. 66 Issue 5, p862-873. 12p.
Publication Year :
2021

Abstract

In small catchments, the time interval most commonly used for simulation – daily or monthly – may not be sufficient to accurately capture the time distribution of hydrological processes. In this paper, the Soil and Water Assessment Tool (SWAT) was used to perform an hourly long-term streamflow and sediment load simulation in the small (4.8 km2) and forested Aixola catchment (northern Spain). From this simulation, 10 runoff events were tested; the most satisfactory results for streamflow were obtained under wet antecedent conditions. However, simulated sediment load was underestimated during the peaks and remained high towards the end of the event. Furthermore, the influence of the precipitation time step (1–4 h, daily) was not relevant in the streamflow simulation but does influence the sediment simulation. The best results were achieved with the daily step simulations obtained at an hourly time step. This paper shows that sub-daily modelling improves water and especially sediment yield results; however, improvements are still needed in timing-related routines. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
02626667
Volume :
66
Issue :
5
Database :
Academic Search Index
Journal :
Hydrological Sciences Journal/Journal des Sciences Hydrologiques
Publication Type :
Academic Journal
Accession number :
150164519
Full Text :
https://doi.org/10.1080/02626667.2021.1883620