Buckland Wastewater Treatment Works

• Location: Newton Abbott and Teign Estuary, Devon
• Client: South West Water
• Sector: Water & Utilities |
• Specialisms: Civil Engineering | Surveying | Digital Engineering & BIM | Flood Resilience |

Pell Frischmann was commissioned by South West Water in November 2018 to undertake a new Model Build and Verification (MBV) of the sewerage catchment serving the Buckland Wastewater Treatment Works (WwTW). The treatment works catchment is naturally split into six separate sub-catchments namely: Shaldon, Teignmouth, Bishopsteignton, Kingsteignton, Teign Villages, and Newton Abbot.

What we did

Works on the scheme were initially commissioned by South West Water’s Asset Management directorate to accommodate growth in planned areas. Subsequently, the main objective for our client was to have an accurate model representation of the catchment to be used for their Baseline Risk and Vulnerability Assessment (BRAVA) network.

On the scheme, Pell Frischmann produced a schematic of the flow monitors used in the catchment and applied confidence level values to each site. This was completed to allow anyone using the model to easily see how reliable the model is in a particular area of the catchment.

During the verification stage of the project, it was agreed that seasonally varying infiltration could be replicated in the model through the application of flows using trade profiles, this method allows the flows to be adjusted on a month-by-month basis.

Outcomes

The services provided by Pell Frischmann enabled South West Water to have an up-to-date model of the catchment which allowed them to complete a BRAVA; a requirement of the government and regulators’ national Drainage and Wastewater Management Planning (DWMP) process. The project was delivered on time and under budget.

Much like the supply and demand balance concept of Water Resource Management Plans, the outputs of BRAVA will provide a strategic view of the level of risk facing drainage and wastewater services now and in the long term. These outputs will help inform decisions on whether interventions are required to ensure that a robust and resilient service can be provided.