Coastal Defence Scheme Nearshore Data Monitoring Services for Pevensey Bay

Description

This tender is for the collection of wave characterisation data at Pevensey Bay, Sussex. The mixed, shingle barrier beach at Pevensey Bay, Sussex, represents a crucial asset in flood defence and coastal risk management along the East Sussex coastline. The 9 km frontage is highly dynamic, and suffers a net loss of sediment due to littoral drift, partly blocked by the Sovereign Harbour breakwaters. The spatial and temporal variations in beach volume, erosion and rollback remain poorly understood, and interventions to redistribute beach material are continuous. A better understanding of the dynamics of this barrier beach is needed to inform future management. The aim of the project is to measure shoreface processes, with an emphasis on wave propagation/transformation and sediment transport across the very shallow nearshore (out to approximately 5 m CD water depth). Lot 1: Provision of Radar Services (or Accepted Equivalent) for Wave Characterisation data for Pevensey Bay The procurement process is being conducted as an Open Procedure, consisting of a one stage tender process. The University proposes to enter into a contract for 18 months which includes the potential for a 6-month extension period. The data gathering will take 12 months and we may allow additional time to cover implementation or exit management issues, or delays to data gathering. The estimated value of Lot 1 is GBP 40 000 (excluding VAT). The mixed, shingle barrier beach at Pevensey Bay, Sussex, represents a crucial asset in flood defence and coastal risk management along the East Sussex coastline. The 9 km frontage is highly dynamic, and suffers a net loss of sediment due to littoral drift, partly blocked by the Sovereign Harbour breakwaters. The spatial and temporal variations in beach volume, erosion and rollback remain poorly understood, and interventions to redistribute beach material are continuous. A better understanding of the dynamics of this barrier beach is needed to inform future management. The aim of the project is to measure shoreface processes, with an emphasis on wave propagation/transformation and sediment transport across the very shallow nearshore (out to approximately 5 m CD water depth). Lot 1 Provision of Radar Services (or approved equivalent) for wave characterisation data for Pevensey Bay. Installation, maintenance and operation of a synoptic radar system or equivalent at the PCDL office, capable of delivering wave field data (including wave heights, periods, direction, and spectral properties) and surface current data for a duration of 12 months at a recording frequency of 15 minutes. The system must store and provide access to raw data such that further data service products may be derived if needed in the future. The system must be able to provide data to a distance of at least 2 km and preferably 4-6 km from the shoreline. The directional wave/current data must be gridded to a spatial resolution no more than 60 m Cartesian grid.