---
title: "Groundwater Level Network Review - Standard Groundwater Index modelling of 40 sites across Wales"
ocid: "ocds-h6vhtk-058ea7"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-h6vhtk-058ea7"
markdown_url: "https://d3tenders.com/contract/ocds-h6vhtk-058ea7.md"
json_url: "https://d3tenders.com/contract/ocds-h6vhtk-058ea7.json"
source: "Find A Tender Service"
current_stage: "Award"
buyer: "NATURAL RESOURCES WALES"
published: "2025-08-27"
---

# Groundwater Level Network Review - Standard Groundwater Index modelling of 40 sites across Wales

Buyer: NATURAL RESOURCES WALES  
Current stage: Award  
OCID: ocds-h6vhtk-058ea7

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## Summary

Natural Resources Wales has completed a procurement process for the "Groundwater Level Network Review" project, involving the Standard Groundwater Index modelling of 40 sites across Wales. As a central government public authority, they contracted the British Geological Survey (BGS) to utilise their unique modelling code. The procurement, classified under the data analysis and supply services category, was awarded using a direct procurement method without competition, given BGS's exclusive capability. The contract, valued at £44,765.22 gross, was signed on 11 August 2025 and is set to run from 18 August to 31 December 2025, primarily taking place across Wales.

This tender represents a valuable opportunity for businesses specialising in geosciences, climate data analysis, and groundwater modelling, especially those with an innovative technological edge in environmental science. While the direct procurement for this contract underscores the importance of specialised skills and proprietary technology in niche markets, future similar procurements could allow other businesses, particularly those capable of developing cutting-edge analytical tools, to collaborate or compete in related projects, fostering industry growth and expertise.

## Notice

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.

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Find A Tender Service |
| Latest notice | https://www.find-tender.service.gov.uk/Notice/051638-2025 |
| Notice type | UK7 - Contract Details Notice |
| Procurement type | Standard |
| Procurement category | Services |
| Procurement method | Direct |
| Procurement method details | Below threshold - without competition |
| Tender suitability | Not specified |
| Awardee scale | Large |
| All stages | Award |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 27 Aug 2025 |
| Submission deadline | Not specified |
| Future notice date | Not specified |
| Award date | 10 Aug 2025 |
| Contract period | 17 Aug 2025 - 31 Dec 2025 |
| Recurrence | Not specified |

## Values

| Field | Value |
| --- | --- |
| Tender value | Not specified |
| Lots value | Not specified |
| Awards value | Not specified |
| Contracts value | £37,304 |

## Status

| Field | Value |
| --- | --- |
| Tender status | Complete |
| Lots status | Complete |
| Awards status | Active |
| Contracts status | Active |

## Buyer

| Field | Value |
| --- | --- |
| Main buyer | NATURAL RESOURCES WALES |
| Locality | CARDIFF |
| Post town | Cardiff |
| Postcode | CF10 3NQ |
| Country | Wales |
| ITL 1 | TLL Wales |
| ITL 2 | TLL5 South East Wales |
| ITL 3 | TLL52 Cardiff and Vale of Glamorgan |
| Local authority | Cardiff |
| Electoral ward | Cathays |
| Westminster constituency | Cardiff South and Penarth |
| Delivery location | Not specified |

## Supplier

| Field | Value |
| --- | --- |
| Number of suppliers | 1 |
| Supplier names | BRITISH GEOLOGICAL SURVEY |

## CPV Codes

### Divisions

- 72 - IT services: consulting, software development, Internet and support

### Codes

- 72316000 - Data analysis services
- 72319000 - Data supply services

## Release History

- 27 Aug 2025 at 13:52 - Award - UK7 - Contract Details Notice - https://www.find-tender.service.gov.uk/Notice/051638-2025

## Documents

- https://www.find-tender.service.gov.uk/Notice/051638-2025
  27th August 2025 - Contract details notice on Find a Tender

## Notice URLs

- http://naturalresourceswales.gov.uk
- https://www.legislation.gov.uk/ukpga/2023/54/contents

## Provenance

This Markdown file is an alternate public rendering of the D3 Tenders contract record. The canonical page is https://d3tenders.com/contract/?ocid=ocds-h6vhtk-058ea7. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-h6vhtk-058ea7.json.