Chapter 8, Problem 8.11P

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9th Edition

Braja M. Das + 1 other

ISBN: 9781305970939

Textbook Problem

Solve Problem 8.10 using L. Casagrande’s method.

**8.10** Refer to the cross section of the earth dam shown in Figure 8.18. Calculate the rate of seepage through the dam (*q* in m^{3}/min/m) using Schaffernak’s solution.

To determine

Find the seepage rate through the dam *q*, in

Explanation

Given information:

The height of the water level *H* is 25 m.

The height of the earth dam

The length of earth dam top

The hydraulic conductivity of the permeable soil layer *k* is

Calculation:

Refer Figure 8.18 in the textbook.

Determine the value of

Here, *V* is the vertical distance in the slope and *H* is the horizontal distance in the slope.

Substitute 1 for *V* and 2 for *H*.

Determine the value of

Substitute 25 m for *H*.

Determine the distance *d* value using the relation.

Substitute 30 m for *H*, and 50 m for

Determine the

Substitute 90 m for *d* and 25 m for *H*.

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