River Nar at Pentney
cbec, in conjunction with frog environmental, were contracted by the Norfolk Rivers Trust to design restoration measures for the tidally-influenced end of a chalk stream in north Norfolk.
cbec undertook topographic surveys on 3 km of the river, which formed the input for a 2D hydrodynamic model of the channel and floodplain. Together with ecological survey information, this was used to develop and appraise potential restoration options, from which a preferred option was selected.
Erosion and sediment transport were considered in the options appraisal for the tidally-influenced section of the River Nar, a chalk stream in north Norfolk. This provided the foundation for detailed engineering designs, implemented in the construction phase, completed in April 2015.
cbec provided a design supervision role during the construction phase.