Question
Download Solution PDFA flownet of a cofferdam foundation has 6 flow channels and 18 equipotential drops. The head loss during seepage is 6 m. If the coefficient of permeability of soil is 4 x 10-5 m/min, then the seepage loss (m3/day) is
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
Determination of seepage discharge when the medium is isotropic:
Seepage discharge is given by,
Where, h = Hydraulic head or head difference between upstream and downstream level or head loss through the soil
Nf = Total number of flow channels
Nd = Total number of equipotential drops
k = Coefficient of permeability
Calculations:
Given,
Nf = 6, Nd = 18, h = 6 m
k = 4 × 10-5 m/min
∵ seepage discharge,
q = 8 × 10-5 × 24 × 60 = 0.115 m3/day
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