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Article

Development and Evaluation of a Saturated Zone Module in an Integrated Urban Hydrological Model

1
Cerema, Equipe Team, 12 rue Teisserenc de Bort, F-78190 Trappes, France
2
Department of GERS/LEE, Campus of Bouguenais, University of Gustave Eiffel GERS-LEE, F-44344 Bouguenais, France
3
IRSTV FR CNRS 2488, rue de la Noe, F-44321 Nantes, France
*
Author to whom correspondence should be addressed.
Academic Editor: Maria Mimikou
Water 2022, 14(7), 1030; https://doi.org/10.3390/w14071030
Received: 7 February 2022 / Revised: 12 March 2022 / Accepted: 18 March 2022 / Published: 24 March 2022
(This article belongs to the Special Issue Hydrological Modeling in Urban Water Management)
Shallow urban groundwater interacts with surface water and underground infrastructures. Low-impact development in urban water management by at-source infiltration should consider shallow urban groundwater in a holistic manner. Traditional hydrological models, however, rarely detail groundwater flows and their interaction with urban runoff and the water budget. In the present study, a new approach is proposed, using the integration of a flow module WTI for the saturated zone in a distributed urban hydrological model URBS-MO. This integration is carried out by paying attention to retaining the initial waterflow subsurface parameterization. The performance of the integrated model is evaluated by piezometric and runoff data in an experimental urban catchment, through a sensitivity analysis and a manual calibration of the main model parameters, as well as a validation step. The new module shows its capacity to improve groundwater flow simulation by assessing more realistic water table variations, along with a very small improvement of flowrate simulation. The bias on the average groundwater level was reduced from +14 to +7% for the one-year validation period. The modelling results show the importance of parameter calibration for distributed physically-based hydrological models. Difficulties in the calibration of parameter values due to spatial heterogeneities are also revealed, as the use of piezometric data for the calibration of a hydrological model is rather innovative. View Full-Text
Keywords: urban hydrology; groundwater; drainage; modelling; integrated; sewer network; URBS-Model urban hydrology; groundwater; drainage; modelling; integrated; sewer network; URBS-Model
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MDPI and ACS Style

Li, Y.; Rodriguez, F.; Berthier, E. Development and Evaluation of a Saturated Zone Module in an Integrated Urban Hydrological Model. Water 2022, 14, 1030. https://doi.org/10.3390/w14071030

AMA Style

Li Y, Rodriguez F, Berthier E. Development and Evaluation of a Saturated Zone Module in an Integrated Urban Hydrological Model. Water. 2022; 14(7):1030. https://doi.org/10.3390/w14071030

Chicago/Turabian Style

Li, Yinghao, Fabrice Rodriguez, and Emmanuel Berthier. 2022. "Development and Evaluation of a Saturated Zone Module in an Integrated Urban Hydrological Model" Water 14, no. 7: 1030. https://doi.org/10.3390/w14071030

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