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  1. Bob1001

    Caisson Shaft Sinking Cost Estimating

    I am currently looking at estimating the cost of sinking an 11.5m shaft in silty sand near Manchester UK. The lower 3m will be in stiff clay. The water table is approximately 3.5m BGL. I have been using CESMM3 for estimating the project but unfortunately it doesn’t cover caissons or shaft...
  2. Bob1001

    Mean flow calculation for hydro scheme

    Ben and cvg, Many thanks for your help on this. Ben, The SAAR and SPR do vary slightly. What you suggested confirms what I had originally planned: Q1/(A1xSPR1xSAAR1)=Q2/(A2xSPR2xSAAR2) CVG I reconise that this is a very simplistic approach but the flow calculation is for a...
  3. Bob1001

    Mean flow calculation for hydro scheme

    Ben, Thanks for your help. The catchment descriptors are similar although with an increased SAAR due to an upland watershed. Are there any formula that can be used for this or guidance on the weighting of the various descriptors?
  4. Bob1001

    Mean flow calculation for hydro scheme

    I am undertaking a feasibility study for a hydro scheme in the UK. We have daily flow records for the last 40 years from a gauging station about 13Km downstream. Using the FEH CDI have SAAR, SPRHOST, AREA values ect. for the site and gauging station. The gauging station catchment area is about...

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