Award of Hertfordshire Chalk Groundwater Model Phase 2 to Stantec UK Limited

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Defra Network eTendering Portal awarded a contract to Stantec UK Limited for Phase 2 of the Hertfordshire Chalk Groundwater Model project, valued at £76,722.

The project covers 4,060 km² of the Chalk aquifer north-east of London, including Hertfordshire and parts of Buckinghamshire, Bedfordshire, Oxfordshire, Essex, Cambridgeshire, and London, and represents Chalk streams in the Wye, Colne, and Lee catchments, which have been assessed as suffering from large-scale over-abstraction.

Phase 2 involves refreshing existing foundation conceptual models and merging them into a single conceptual model, gathering and reviewing datasets and literature to support the merged model update, reporting on initial conceptual model uncertainty and data gaps, expanding the conceptual model where new data and literature are available for concepts such as influence of superficial deposits, karstic development, and evidence of hydrogeological layering within the Chalk, and reporting on the updated conceptual model with recommendations for development and refinement of the numerical model in MODFLOW 6 for Phase 3.