Articles & Case Studies

Resourcefulness in resources

Posted: Friday 8th July 2011

Construction and civil engineers, Osborne, recently appointed ADAS to conduct the Environmental Impact Assessment for the re-construction of Shoreham Footbridge over the Adur Estuary, with a focus on Water Resource Management and Ecology.

Challenge

With the Environment Agency currently involved in a Flood Defence Scheme at Shoreham Harbour, further work in the barea, below the high water mark, needed to be carefully executed to eliminate any cumulative effects to flood risk potential.

In addition, the tidal nature of the site and its boundary with a Site of Special Scientific Interest (SSSI) created increased ecological and hydrological considerations.

Method

Standardised ecological, hydrological and hydro-geological studies, alongside consultations allowed the identification of all sensitive receptors requiring further assessment. This resulted in analyses of the estuary’s natural hydrological movements, as well as the Adur’s terrestrial and marine inhabitants to allow a suitable approach to construction schedules and activities to mitigate adverse impacts and comply with environmental regulations.

Results

Solutions to reduce and nullify potential adverse impacts necessitated the consideration (and assistance) of the estuary’s daily, monthly and seasonal hydrological cycle.

While design modifications reduced the flood risk potential of the site, the estuary’s own water movement was employed throughout the construction period to reduce ecological damage and disruption to migratory and resident species at this fragile and highly productive habitat.




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