Invitation to Tender - Braunton Marsh
Brushwood sediment fences and brushwood wave baffles.
The purpose of this scheme is to use natural materials to encourage the accretion of fine sediments on the great bank at Horsey Island on the
Taw Torridge estuary. The principle has been adapted from the practice in the German and Dutch polder fencing used to trap sediment and
warp up the polders.
The need in this case is to add resilience to the flood banks by encouraging sediment to deposit on the flank of the flood bank to infiltrate and fill
interstices in the bank , thereby decreasing porosity and add mass to the bank. The newly warped up sediments should also readily colonise with
appropriate saltmarsh vegetation.
The project is part of a Natural Flood Management Demonstration Project that is funded via the Environment Agency.
The fencing will be placed perpendicular to dominating flows and wave action at a number of sites and accretion will be monitored.