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Developing a tile drainage module for the Cold Regions Hydrological Model: lessons from a farm in southern Ontario, Canada

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dc.contributor.authorKompanizare, Mazda
dc.contributor.authorCosta, Diogo
dc.contributor.authorMacrae, Merrin
dc.contributor.authorPomeroy, John W.
dc.contributor.authorPetrone, Richard
dc.date.accessioned2024-07-18T21:25:12Z
dc.date.available2024-07-18T21:25:12Z
dc.date.issued2024-07-04
dc.description.abstractSystematic tile drainage is used extensively in poorly drained agricultural lands to remove excess water and improve crop growth; however, tiles can also transfer nutrients from farmlands to downstream surface water bodies, leading to water quality problems. Thus, there is a need to simulate the hydrological behaviour of tile drains to understand the impacts of climate or land management change on agricultural surface and subsurface runoff. The Cold Regions Hydrological Model (CRHM) is a physically based, modular modelling system developed for cold regions. Here, a tile drainage module is developed for CRHM. A multi-variable, multi-criteria model performance evaluation strategy was deployed to examine the ability of the module to capture tile discharge under both winter and summer conditions (NSE > 0.29, RSR < 0.84 and PBias < 20 for tile flow and saturated storage simulations). Initial model simulations run at a 15 min interval did not satisfactorily represent tile discharge; however, model simulations improved when the time step was lengthened to hourly but also with the explicit representation of capillary rise for moisture interactions between the rooting zone and groundwater, demonstrating the significance of capillary rise above the saturated storage layer in the hydrology of tile drains in loam soils. Novel aspects of this module include the sub-daily time step, which is shorter than most existing models, and the use of field capacity and its corresponding pressure head to provide estimates of drainable water and the thickness of the capillary fringe, rather than using detailed soil retention curves that may not always be available. An additional novel aspect is the demonstration that flows in some tile drain systems can be better represented and simulated when related to shallow saturated storage dynamics.
dc.description.sponsorshipCFREF Global Water Futures programme, Ontario Ministry of Agriculture, Food and Rural Affairs
dc.description.versionPeer Reviewed
dc.identifier.citationKompanizare, M., Costa, D., Macrae, M. L., Pomeroy, J. W., and Petrone, R. M.: Developing a tile drainage module for the Cold Regions Hydrological Model: lessons from a farm in southern Ontario, Canada, Hydrol. Earth Syst. Sci., 28, 2785–2807, https://doi.org/10.5194/hess-28-2785-2024, 2024
dc.identifier.doi10.5194/hess-28-2785-2024
dc.identifier.urihttps://hdl.handle.net/10388/15842
dc.language.isoen
dc.publisherEuropean Geosciences Union
dc.rightsAttribution 2.5 Canadaen
dc.rights.urihttp://creativecommons.org/licenses/by/2.5/ca/
dc.subjecttile drainage module
dc.subjectHydrological Modeling
dc.titleDeveloping a tile drainage module for the Cold Regions Hydrological Model: lessons from a farm in southern Ontario, Canada
dc.typeArticle

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