Groundwater–surface water model for Carcajou Watershed in permafrost region.

A fully integrated numerical groundwater–surface water climate model using HydroGeoSphere was developed for a gauged basin in the discontinuous permafrost zone, and the resulting dataset is provided to verify numerical methods and test conceptualizations for regional-scale modelling.

A gap remains in understanding water resources and groundwater influence in permafrost-dominated regions at regional scales. Regional modelling, linked with regional climate models, can help address these gaps. Developing usable regional models requires ongoing work on methods and conceptual approaches. A fully integrated numerical groundwater–surface water climate model was developed for a gauged basin in the discontinuous permafrost zone using HydroGeoSphere. Key details: - The model was built using HydroGeoSphere (HGS) for a gauged basin within the discontinuous permafrost zone. - The dataset is intended to allow verification of existing numerical methods for integrated groundwater–surface water flow. - The dataset supports testing of different conceptualizations of groundwater–surface water interactions in permafrost regions at regional scale. - The work is presented as a resource to inform future regional modelling and forecasting of water resources in permafrost regimes. Summary: The dataset documents a fully integrated model effort that addresses gaps in regional understanding of water and groundwater in permafrost areas. It is presented as a tool for verifying modelling approaches and exploring conceptual choices, and it is described as informing future regional modelling and forecasting efforts.