Articles | Volume 28, issue 16
https://doi.org/10.5194/hess-28-3695-2024
https://doi.org/10.5194/hess-28-3695-2024
Research article
 | 
16 Aug 2024
Research article |  | 16 Aug 2024

Drainage assessment of irrigation districts: on the precision and accuracy of four parsimonious models

Pierre Laluet, Luis Olivera-Guerra, Víctor Altés, Vincent Rivalland, Alexis Jeantet, Julien Tournebize, Omar Cenobio-Cruz, Anaïs Barella-Ortiz, Pere Quintana-Seguí, Josep Maria Villar, and Olivier Merlin

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This preprint is open for discussion and under review for Hydrology and Earth System Sciences (HESS).
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Cited articles

Abdi, D. E., Owen, J. S., Wilson, P. C., Hinz, F. O., Cregg, B., and Fernandez, R. T.: Reducing pesticide transport in surface and subsurface irrigation return flow in specialty crop production, Agr. Water Manage., 256, 107124, https://doi.org/10.1016/j.agwat.2021.107124, 2021. 
Ale, S., Gowda, P. H., Mulla, D. J., Moriasi, D. N., and Youssef, M. A.: Comparison of the performances of DRAINMOD-NII and ADAPT models in simulating nitrate losses from subsurface drainage systems, Agr. Water Manage., 129, 21–30, https://doi.org/10.1016/j.agwat.2013.07.008, 2013. 
Allen, R., Pereira, L., and Smith, M.: Crop evapotranspiration-Guidelines for computing crop water requirements-FAO Irrigation and drainage paper 56, https://www.fao.org/4/X0490E/X0490E00.htm (last access: 11 August 2024 1998. 
Altés, V., Bellvert, J., Pascual, M., and Villar, J. M.: Understanding Drainage Dynamics and Irrigation Management in a Semi-Arid Mediterranean Basin, Water, 15, 16, https://doi.org/10.3390/w15010016, 2022. 
Amazirh, A., Merlin, O., Er-Raki, S., Bouras, E., and Chehbouni, A.: Implementing a new texture-based soil evaporation reduction coefficient in the FAO dual crop coefficient method, Agr. Water Manage., 250, 106827, https://doi.org/10.1016/j.agwat.2021.106827, 2021. 
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Short summary
Monitoring agricultural drainage flow in irrigated areas is key to water and soil management. In this paper, four simple drainage models are evaluated on two irrigated sub-basins where drainage flow is measured daily. The evaluation of their precision shows that they simulate drainage very well when calibrated with drainage data and that one of them is slightly better. The evaluation of their accuracy shows that only one model can provide rough drainage estimates without calibration data.
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