Performance monitoring General monitoring is undertaken as part of Environment Agency-led Anglian Coastal Monitoring Program, including beach profile surveys and aerial photography. The scheme-specific monitoring focuses on the following: • The development of the salt marsh habitat in the infilled channel of the River Glaven estuary • The effects of construction and operation on suspended solids and fecal coliform concentrations in Blakeney estuary • The effects of construction and subsequent operation on several birds in the Cley and Salthouse marshes • The successful in situ protection of plants and re-establishment of lost plants after construction • Salinity in the ditch network of Cley and Salthouse marshes Specifications Design criteria for drainage infrastructure to accommodate high flows during tidal inundation events were prescribed in the tender documents.
CASE STUDY:
Nature-Based System – the Hondsbossche Dunes and Beach (Noord-Holland, the Netherlands) Because the Hondsbossche and Pettemer sea dike no longer met safety standards, the dike was reinforced in 2015 with a soft, natural barrier of 30 million m3 of sand on the seaside of the dike. The resulting area was renamed Hondsbossche dunes (Figure 9.25). The information in this section is from EcoShape 2019, ecoshape.org 2021, and Arcadis 2013.
09 | Beaches and Dunes
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