MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Flow Nets

The seepage o...

Question

The seepage occuring through an earthen dam is represented by a flow net comprising of 10 equipotential drops and 20 flow channels. The coefficient of permeability of the soil is 3 mm/min and the head loss is 5 m. The rate of seepage (expressed in $c m^{3} / s$ per m length of the dam) through the earthen dam is .
500

Open in App

Solution

The correct option is A 500
$q = k H \frac{N_{f}}{N_{d}} = \frac{3 \times 10^{- 3}}{60} \times 5 \times 2$

$= 5 \times 10^{- 4} m^{3} / s / m$

$q = 500 c m^{3} / s / m$

Suggest Corrections

thumbs-up

2

Similar questions

Q. A flownet of a coffer dam foundation has 6 flow channels and 18 equipotential drops. The head of water lost during seepage is 6 m. If the coefficient of permeability of foundation is

4 \times 10^{- 5}

m/min, then the seepage loss per metre length of dam will be

Q. A flownet constructed to determine the seepage through an earth dam which is homogeneous but anisotropic, gave four flow channels and sixteen equipotential drops. The coefficients of permeability in the horizontal and vertical directions are

4.0 \times 10^{- 7} m / s a n d 1 \times 10^{- 7} m / s

respectively. If the storage head was 20 m, then the seepage per unit length of the dam (in m3/s) would be

Q. The flow net below a dam consists of 25 equipotential lines and 9 flow lines. The available head is 6 m. Taking coefficient of permeability as

3.8 \times 10^{- 6} m / s

(m^{3} / s p e r m)

under the dam is

Q. A flownet for an earth dam on impervious foundation consists of 4 flow channels and 15 equipotential drops. The full reservoir level is 15 m above the downstream horizontal filter. Given that horizontal permeability is

9 \times 10^{- 6}

m/s and vertical permeability is

1 \times 10^{- 6}

m/s, the quantity of seepage through the dam will be

Q. A dam is to be constructed on a sandy soil which has coefficient of permeability

10 \times 10^{- 4} c m / s e c

in horizontal direction

2.5 \times 10^{- 4} c m / s e c

in vertical direction. The dam is expected to impound 7.5 m of water. Flow net drawn on transformed section yields flow channels as '6' and drops are 15 only. The seepage loss per metre length of dam if water on downstream is 0.5 m

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Flow Nets

SOIL MECHANICS

Watch in App

explore_more_icon

Explore more

Other Soil Mechanics

Join BYJU'S Learning Program

CrossIcon