Source: https://tendernation.io/opportunities/01a13bc2-268f-7120-993f-401a287a7139/groundwater-level-network-review-standard-groundwater-index-modelling-of-40-si awarded GB direct award procedure # Groundwater Level Network Review – Standard Groundwater Index modelling of 40 sites across Wales [Natural Resources Wales](https://tendernation.io/buyers/natural-resources-wales) Estimated value Not stated Published 27 Aug 2025 Deadline Rolling deadline ## About this tender The Geoscience Team have set up a project to review the groundwater level data we hold from across our groundwater monitoring network (130 sites). We have chosen 40 site to look at in more detail using the modelling code the British Geological Survey (BGS) have developed to get a standard groundwater index (SGI). The aim of the project is to use the AquiMod 2 groundwater model (Mackay et al. 2022) in conjunction with historical, bias corrected climate data to reconstruct daily groundwater level time series back to 1894 at each borehole, before calculating an equivalent standardised time series which can be used to assess the historical occurrence of groundwater drought at each borehole. Once the data is processed through the modelling code, we (NRW in house) can then use this data to compare and review groundwater levels from sites with different geologies and geographical areas from around Wales in a standardised way. This allows analysis of drought response and allow us to consider drought management in the future. The BGS have developed the modelling code to determine the SGI. They are the only organisation within the UK that can use the modelling code as the code is not commercially available. As the BGS are the only organisation we must follow the Single Tender Action procurement process to secure a contact for the works. Source Find a Tender (UK) · Notice ocds-h6vhtk-058ea7-2025-08-27T14:52:43+01:00 [View official notice](https://www.find-tender.service.gov.uk/Notice/ocds-h6vhtk-058ea7-2025-08-27T14:52:43+01:00) Never miss a tender like this again Get AI summaries, deadline alerts and a bid pipeline for tenders matched to your business. Free to start. [Track tenders free](https://tendernation.io/register) [Buyer profile Natural Resources Wales: past awards and live tenders](https://tendernation.io/buyers/natural-resources-wales) ## More tenders like this [Bannister Sports Centre Athletic Track Soft Market Testing Exercise · Harrow Council · 38 days left · 26 Nov 2026](https://tendernation.io/opportunities/01a1540d-d9e4-71cb-ad57-1603e9042fec/bannister-sports-centre-athletic-track-soft-market-testing-exercise) [Engineering works and construction works – Integrated Partnerships Framework · Northern Ireland Water · 30 days left · 18 Nov 2026](https://tendernation.io/opportunities/01a156a9-7b9a-73c9-b710-2a5021d3fa0d/united-kingdom-engineering-works-and-construction-works-integrated-partnersh) [Hdc-1714 wadkins pavilion refurbishment · Harborough District Council · 39 days left · 27 Nov 2026](https://tendernation.io/opportunities/01a155bf-f664-72f9-9823-a85d6cddbdc6/hdc-1714-wadkins-pavilion-refurbishment) [Design, supply, and Installation of Newbiggin Skatepark Extension · Newbiggin Town Council · 35 days left · 23 Nov 2026](https://tendernation.io/opportunities/01a15552-19a2-7348-a5cc-3f5ae51ef934/design-supply-and-installation-of-newbiggin-skatepark-extension) [Tender for the design, supply, delivery and installation of a modular UNIT and associated works at ARC healthy living, irvinestown. peaceplus funded upgrade works · Fermanagh and Omagh District Council · 14 days left · 2 Nov 2026](https://tendernation.io/opportunities/01a15552-1b74-73ec-a6f6-a1af37959997/tender-for-the-design-supply-delivery-and-installation-of-a-modular-unit-and-a) [Architectural, design and building consultancy services - Dalby Visitor Centre · Forestry Commission · 25 days left · 13 Nov 2026](https://tendernation.io/opportunities/01a15552-1b8a-7041-80fb-e4943876fc38/architectural-design-and-building-consultancy-services-dalby-visitor-centre)