Long-term (1960-2017) simulation of Lake Champs-sur-Marne with Delft3D-FLOW: model configuration and results

Published: 22-04-2021| Version 1 | DOI: 10.17632/92kzf5t5xn.1
Contributors:
Francesco Piccioni,
Céline Casenave,
Bruno Jacques Lemaire,
Patrick Lemoigne,
Philippe Dubois,
Brigitte Vinçon-Leite

Description

This data set is relative to the article “The thermal response of small and shallow lakes to climate change: new insights from 3D hindcast modelling” (Piccioni et al., ESD, 2021). The Delft3d-FLOW module from the Delft3D modeling package (version 4.01.01.rc.03) was used to simulate and reconstruct the hydrodynamics of Lake Champs-sur-Marne (France, lat.: 48.864035, long.: 2.596436) during a 58 year-long period going from 1960 to 2017, in order to investigate the time and spatial evolution of its thermal regime. The model is forced with hourly meteorological data of relative humidity [%], air temperature [°C], net solar radiation [J.s-1.m-2], wind speed [m.s-1] and direction [°N]. Long-term data of specific humidity, air temperature, net solar radiation and wind speed are issued from the SAFRAN meteorological reanalysis (e.g. Raimonet et al., 2017) and were provided for this study by Météo-France. Raw SAFRAN data were processed and, when needed, converted as specified in Piccioni et al. (2021). The resulting meteorological data set in terms of relative humidity, air temperature, net solar radiation and wind speed was used in Piccioni et al. (2021), and is stored here in the text file “Meteo_input_1960_2017.txt”. Any other publication using these data should mention the source and Météo-France must appear explicitly in the acknowledgements. Wind direction data used in the study are property of Météo-France (Meteorological station in Trappes (F)). They were retrieved through the INRAE CLIMATIK platform (https://intranet.inrae.fr/climatik/, last access: 5 March 2020, in French) managed by the AgroClim laboratory of Avignon, France. They are therefore not included in this data set. In this data set users will find the model set-up for the long-term three-dimensional simulation as well as model results in terms of water temperature at measuring site A in text format. The model set-up consists of: • Two files defining the computational mesh: “Grid.grd” and “Grid_enc.enc” • One file defining bathymetry: “Depth.dep” • One file defining the location of the monitoring points: “Monitoring_location.obs” • One master definition flow file defining all parameters and information needed to carry out the hydrodynamic simulation: “19600101_20171231.mdf” Model results are here given in a single text file (“Results_1960_2017_A.txt”) for one location (site A) and all 12 layers in terms of water temperature [°C]. The file is organized as a table with one raw for each output time step of the model (hourly). The first column contains time as serial date numbers according to the proleptic ISO calendar used in MATLAB; following, are model results for all layers of the model from bottom to surface.

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