Flood Cell Overview

Selkirk FPS is being promoted under the new Flood Risk Management (Scotland) Act 2009 and has embraced its ethos of Sustainable Flood Management, Natural Flood Management, and a Catchment Based understanding of the flooding problem.

A map outlining the watercourses of Southern Scotland and a map outlining the Ettrick Catchment are provided here for your reference: please click on the images.


To ensure that the Scheme complies with the current Scottish Government guidelines for undertaking an Economic Appraisal for a Flood Protection Scheme, and in order to generate the Benefit Cost Ratio (BCR), it was necessary to split Selkirk into distinct ‘Cells’.

A Flood Cell is a specifically defined and isolated geographical area which is separately considered (as a block of land and property) for economic appraisal purposes. The economic benefits from one flood cell cannot be used to subsidise the economic benefits of another flood cell.

There is an overlapping of flood cells in certain areas. As an example, some areas of the Riverside Business Park are liable to flooding from flood events generated by the River Ettrick and the Shaw Burn. However, it is extremely unlikely that these flood events would occur simultaneously (due to different catchment hydrology). It is for this reason that both cells independently justify flood protection.

The inclusion of the St. Mary’s Loch Option and Natural Flood Management allow the scheme to consider options at a catchment scale that deliver real benefits to Selkirk.

A schematic of the Ettrick Catchment, including its watercourses and the Project’s Flood Cells, is provided here for your reference.

Flood Cell 8Flood Cell 3Flood Cell 2Flood Cell 1Flood Cell 6Flood Cell 4Flood Cell 5Flood Cell 7Flood Cell 8Flood Cell 7Flood Cell 6Flood Cell 5Flood Cell 1

For a summary of the Preferred Scheme please click here

For more information on any of the Cells please click on the flood cell menu item above and select the appropriate flood cell or click on an appropriate part of the schematic image above.