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| Main Authors: | , , , , , |
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| Format: | Artículo Open Access |
| Published: |
Wiley
2025
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| Subjects: | |
| Online Access: | https://onlinelibrary.wiley.com/doi/10.1002/hyp.70340 |
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Table of Contents:
- Evaluation of SWAT‐RIVE's Ability to Represent the Hydrobiogeochemical Dynamics in the Vienne Watershed Sarah Manteaux Clément Fabre Sabine Sauvage René Samie Céline Monteil José‐Miguel Sánchez‐Pérez Hydrological Processes ABSTRACT Water is an essential resource to preserve, yet it faces numerous pressures, including nitrate pollution from nitrogen inputs in agriculture. Models serve as valuable tools for analysing nitrate transfer and regulation processes within watersheds, helping to identify pollution sources. The coupling of the Soil and Water Assessment Tool (SWAT) with the drainage network biogeochemical model RIVE provides a comprehensive modelling approach called SWAT‐RIVE, which was previously tested on a section of the Garonne River (France). This study evaluates the ability of SWAT‐RIVE to represent hydrological and biogeochemical dynamics in the Vienne catchment (France). The objective of this paper is to evaluate and simulate hydro‐biogeochemical dynamics from 1993 to 2017, focusing on nitrate transfer and regulation at the watershed scale, including wetlands and epilithic biofilm interfaces. As the nitrogen cycle is interconnected with other elements, such as organic carbon, phosphorus and silica, influencing processes like denitrification and plant or algal growth, the SWAT‐RIVE representation of these elements was also assessed. Daily water and nitrate dynamics were well simulated at the catchment scale, with average NSE values of 0.45 and 0.15, R 2 values of 0.52 and 0.62 and KGE values of 0.65 and 0.39, respectively. Some other variables were accurately simulated at the outlet, particularly dissolved oxygen (NSE = 0.96, R 2 = 0.96, KGE = 0.89), dissolved silica (NSE = 0.85, R 2 = 0.93, KGE = 0.72) and dissolved organic carbon (NSE = 0.52, R 2 = 0.82, KGE = 0.50), confirming the possibility of using SWAT‐RIVE outputs to evaluate nitrate dynamics at the catchment scale. Despite several limitations, the coupling of SWAT and RIVE leads to a more precise quantification of biogeochemical processes on hillslopes and in the watercourse, making it possible to consider the use of SWAT‐RIVE in other watersheds. 10.1002/hyp.70340 http://creativecommons.org/licenses/by/4.0/