Published date: 11 April 2022
Last edited date: 11 April 2022
This notice was replaced on 14 April 2022
This notice does not contain the most up-to-date information about this procurement. The most recent notice is:
Opportunity (published 14 April 2022)
Closed future opportunity - This means that a potential contract has passed its approach to market date. A buyer can choose to consider any supplier interest or convert this notice into an opportunity ready for live procurement.
Contract summary
Industry
Design-modelling services - 72242000
Location of contract
Any region
Value of contract
£0
Procurement reference
tender_303900/1060390
Published date
11 April 2022
Approach to market date
15 April 2022
Contract start date
6 June 2022
Contract end date
5 June 2023
Contract is suitable for SMEs?
Yes
Contract is suitable for VCSEs?
Yes
Description
The Hertfordshire Chalk Groundwater Model (HCGM) represents 4060km2 of the Chalk aquifer to the north-east of London, including the county of Hertfordshire, parts of Buckinghamshire, Bedfordshire, Oxfordshire, Essex, Cambridgeshire, and London. The model represents a number of Chalk streams that are situated in the Wye, Colne and Lee catchments. These catchments have been previously assessed to suffer from large scale over abstraction through the Catchment Abstraction Management Strategy (CAMS) methodology.
The Hertfordshire Chalk Groundwater Model (HCGM) was built between 2017 and 2019. The focus of the HCGM build was to join three existing groundwater models; Vale of St Albans (VSA), Rib-Ash-Stort (RAS) and South West Chilterns (SWC), which covered the area into one single model. Additional input from the Cam, Bedford Ouse (CBO) groundwater model was used where the newly defined boundary of the HCGM extended into the CBO model area. The model is currently used for groundwater management for surface water catchments in the Agency's Hertfordshire and North London (HNL) and Thames areas. The objective of this model merger was to overcome the difficulties in assessing the impact of abstractions where such abstractions were located close to model boundaries.
The EA is looking to procure an external contractor to deliver Phase 2 of the project, which will deliver the Formulation of Revised Conceptual Model. This phase will refresh the existing foundation conceptual models and merge them into a single conceptual model that will then be updated. This will then support proposals for further development of the model in Phase 3.
The objectives of Phase 2 will be:
- To refresh the existing foundation conceptual models and merge them into a single conceptual model
- To gather and review necessary datasets and literature to support merged conceptual model update, reporting on initial model conceptual model uncertainty and data gaps
- To expand the conceptual model where new data and literature is available for several concepts such as influence of superficial deposits, karstic development, evidence of hydrogeological layering within the Chalk
- To report on the updated conceptual model and make recommendations for development and refinement of numerical model in MODFLOW 6 (Phase 3)
About the buyer
Contact name
XX XX
Address
17 Nobel House
London
SW1P 3JR
England
Telephone
+443001234500
Website
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