Pevensey Bay Nearshore Monitoring

Contract summary

Industry

• Radar - 35722000

• Surveying, hydrographic, oceanographic and hydrological instruments and appliances - 38290000

• Oceanography and hydrology services - 71351920

Show additional CPV codes for this notice

• Physical oceanography services - 71351922

Location of contract

BN24 6ND

Value of contract

£200,000

Procurement reference

2020UOS-0154

Published date

15 July 2020

Closing date

18 August 2020

Contract start date

30 September 2020

Contract end date

29 March 2022

Contract type

Service contract

Procedure type

Open procedure (above threshold)

Contract is suitable for SMEs?

Yes

Contract is suitable for VCSEs?

No

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Description

The mixed, shingle barrier beach at Pevensey Bay, East Sussex, represents a crucial asset in flood defence and coastal risk management along the East Sussex coastline, protecting the low-lying Pevensey Levels, with designated wetlands as well as thousands of vulnerable properties (many built at the crest) and coastal infrastructure.

The 9km frontage is highly dynamic and suffers a net loss of sediment due to littoral drift, partly blocked by the Sovereign Harbour breakwater at the southern side (Sutherland and Thomas, 2011). This is managed through continuous bypassing and recycling of beach material, as well as regular beach nourishment and repair of key groynes, following a major capital recharge scheme in 2002. This is operated under a unique, private finance initiative, to provide a 1:400 year standard protection against breaching and maintaining a crest elevation.

The spatial and temporal variations in beach volume, erosion and rollback remain poorly understood, and interventions to redistribute beach material are continuous. Furthermore, the beach experiences lowering of the sandy foreshore, though the exact drivers for this remain unknown. A better understanding of the dynamics of this barrier is thus needed to inform future management. The aim of the project is to apply a novel method for measuring shoreface processes (in shallow waters with a tidal range of 6.1 m), with an emphasis on wave propagation/ transformation and sediment transport across the very shallow nearshore (out to approximately 6m CD water depth).

To measure nearshore processes, an array of bottom-mounted instruments will be set up across the shallow foreshore, to define wave progression and energy flux across the beach and to measure vertical velocity and suspended sediment profiles, including a measurement near the bed (Figure 1). This will be complemented by a synoptic wave radar and a sustained survey campaign carried out independently of this tender by a contractor and the university staff using their own equipment. It is anticipated that the wave radar array will be in place by October 2020, for a one-year long deployment.

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More information

Additional text

The University is utilising an electronic tendering tool, In-Tend (https://intendhost.co.uk/ universityofsouthampton) to manage this procurement and to communicate with tenderers (as appropriate).

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Publication of Award Details: In accordance with Regulation 50, paragraph (2) of the Public Contracts Regulations 2015 and subject to Article 5 and Annex 5, Part D (13) of Directive 2014/24/EU of the European Parliament and of the Council (if applicable), the University intends to publish the value of any resulting contract at the award stage, and reserves the right to do so. By submitting a response, tenderers are consenting to publication of this information unless otherwise agreed in advance with the University.

Tenderers are solely responsible for their costs and expenses incurred in connection with the preparation and submission of responses and participation in this and all future stages of this procurement. Under no circumstances will the University be liable for any costs or expenses borne by potential suppliers/tenderers or any of their supply chain, partners or advisers in this procurement process.

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About the buyer

Contact name

Victoria Becheley

Address

Highfield
SOUTHAMPTON
SO171BJ
England

Telephone

02380595689

Email

vsh@soton.ac.uk