Preprints
https://doi.org/10.5194/gmd-2021-332
https://doi.org/10.5194/gmd-2021-332

Submitted as: model description paper 11 Oct 2021

Submitted as: model description paper | 11 Oct 2021

Review status: this preprint is currently under review for the journal GMD.

Implementation and validation of a new irrigation scheme in the ISBA land surface model

Arsène Druel1,a, Simon Munier1, Anthony Mucia1, Clément Albergel1,b, and Jean-Christophe Calvet1 Arsène Druel et al.
  • 1CNRM, Université de Toulouse, Météo-France, CNRS, Toulouse, France
  • anow at: Ecologie des Forêts Méditerranéennes (URFM), Institut national de recherche pour l'agriculture, l'alimentation et l'environnement (INRAE), Avignon, France
  • bnow at: European Space Agency Climate Office, ECSAT, Harwell Campus, OX11 0FD Didcot, Oxfordshire, United Kingdom

Abstract. With an increase in the number of natural processes represented, global land surface models (LSMs) have become more and more accurate in representing natural terrestrial ecosystems. However, they are still limited, especially in the representation of the impact of agriculture on land surface variables. This is particularly true for agro-hydrological processes related to a strong human control on freshwater. While most LSMs consider natural processes only, the development of human-related processes, e.g. crop phenology and irrigation in LSMs, is key. In this study we present the implementation of a new irrigation scheme in the ISBA (Interaction between Soil, Biosphere, and Atmosphere) LSM. This highly flexible scheme is designed to account for various configurations and can be applied at different spatial scales. For each vegetation type within a model grid cell, three irrigation systems can be used at the same time. A limited number of parameters are used to control (1) the amount of water used for irrigation, (2) irrigation triggering (based on the soil moisture stress) and (3) crop seasonality (emergence, harvesting). After a presentation of the simulations of the new scheme at a plot scale, an evaluation is proposed over Nebraska (USA). This region is chosen for its high irrigation density and because independent observations of irrigation practices can be used to verify the simulated irrigation amounts. The ISBA simulations with and without the irrigation scheme are compared to different satellite-based observations. The comparison shows that the irrigation scheme improves the simulated vegetation variables such as leaf area index and gross primary productivity and other variables largely impacted by irrigation such as evapotranspiration and land surface temperature. In addition to a better representation of land surface processes, the results point to potential applications of this new version of the ISBA model for water resource monitoring and climate change impact studies.

Arsène Druel et al.

Status: open (until 06 Dec 2021)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse

Arsène Druel et al.

Data sets

GLEAM evapotranspiration Martens, B., Miralles, D. G., Lievens, H., van der Schalie, R., de Jeu, R. A. M., Fernández-Prieto, D., Beck, H. E., Dorigo, W. A. and Verhoest, N. E. C. https://www.gleam.eu/

Land surface temperature Freitas, S. C., Trigo, I. F., Macedo, J., Barroso, C., Silva, R. and Perdigão, R. https://land.copernicus.eu/global/products/lst

In situ precipitation University of Nebraska-Lincoln http://climod.unl.edu/

LAI Baret, F., Weiss, M., Lacaze, R., Camacho, F., Makhmara, H., Pacholcyzk, P. and Smets, B. https://land.copernicus.eu/global/products/lai

FLUXCOM GPP Jung, M., Koirala, S., Weber, U., Ichii, K., Gans, F., Camps-Valls, G., Papale, D., Schwalm, C., Tramontana, G., Reichstein, M. https://git.bgc-jena.mpg.de/skoirala/fluxcom_ef_figures

ERA5 atmospheric forcing Hersbach, H., Bell, B., Berrisford, P., Hirahara, S., Horányi, A., Muñoz-Sabater, J., Nicolas, J., Peubey, C., Radu, R., Schepers, D., Simmons, A., Soci, C., Abdalla, S., Abellan, X., Balsamo, G., Bechtold, P., Biavati, G., Bidlot, J., Bonavita, M., Chiara, G., Dahlgren, P., Dee, D., Diamantakis, M., Dragani, R., Flemming, J., Forbes, R., Fuentes, M., Geer, A., Haimberger, L., Healy, S., Hogan, R. J., Hólm, E., Janisková, M., Keeley, S., Laloyaux, P., Lopez, P., Lupu, C., Radnoti, G., Rosnay, P., Rozum, I., Vamborg, F., Villaume, S., and Thépaut, J. https://cds.climate.copernicus.eu/cdsapp#!/dataset/reanalysis-era5-single-levels?tab=overview

Water used for irrigation USGS https://waterdata.usgs.gov/ne/nwis/wu

Global irrigation map Meier, J., Zabel, F. and Mauser, W. https://doi.pangaea.de/10.1594/PANGAEA.884744

Model code and software

New irrigation scheme in the ISBA land surface model Druel, A., Munier, S., Mucia, A., Albergel, C., Calvet, J.-C. https://github.com/ArseneD/OPEN_SURFEX_V81_IRR

SURFEX modelling platform Masson, V., Le Moigne, P., Martin, E., Faroux, S., Alias, A., Alkama, R., Belamari, S., Barbu, A., Boone, A., Bouyssel, F., Brousseau, P., Brun, E., Calvet, J.-C., Carrer, D., Decharme, B., Delire, C., Donier, S., Essaouini, K., Gibelin, A.-L., Giordani, H., Habets, F., Jidane, M., Kerdraon, G., Kourzeneva, E., Lafaysse, M., Lafont, S., Lebeaupin Brossier, C., Lemonsu, A., Mahfouf, J.-F., Marguinaud, P., Mokhtari, M., Morin, S., Pigeon, G., Salgado, R., Seity, Y., Taillefer, F., Tanguy, G., Tulet, P., Vincendon, B., Vionnet, V. and Voldoire, A. https://www.umr-cnrm.fr/surfex/

Arsène Druel et al.

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Short summary
Irrigation is implemented into a land surface model able to work at aglobal scale. After a presentation of the simulations of the new scheme at a plot scale, an evaluation is proposed over Nebraska (USA). Simulations with and without the irrigation scheme are compared to different satellite-based observations. The irrigation scheme improves the simulated leaf area index, gross primary productivity, evapotranspiration and land surface temperature.