Civil Engineering - Soil Mechanics and Foundation Engineering - Discussion
Discussion Forum : Soil Mechanics and Foundation Engineering - Section 2 (Q.No. 23)
23.
For a homogeneous earth dam 50 m high having 2 m free broad, a flow net was constructed and the results were : Number of potential drops = 2.4 Number of flow channels = 0.4. If coefficiency of permeability of the dam mateiral is 3 x 10-3 cm3/sec, the discharge per metre length of dam, is
Discussion:
22 comments Page 3 of 3.
Abhesh kumar yadav said:
2 years ago
Number of potential drops = 2.4,
Number of flow channels = 0.4.
Coefficient of permeability of the dam material = 3 x 10^-3 cm^3/sec.
Height of the dam = 50 m.
Freeboard of the dam = 2 m.
Calculations:
Head loss, h = 50 m - 2 m = 48 m.
Discharge per meter length of the dam, Q = kh * (Nf/Nd).
= (3 x 10^-3 cm^3/sec) * 48 m * (0.4/2.4).
= 24 x 10^-5 m^3/sec.
Therefore, the discharge per meter length of the dam is 24 x 10^-5 m^3/sec.
Number of flow channels = 0.4.
Coefficient of permeability of the dam material = 3 x 10^-3 cm^3/sec.
Height of the dam = 50 m.
Freeboard of the dam = 2 m.
Calculations:
Head loss, h = 50 m - 2 m = 48 m.
Discharge per meter length of the dam, Q = kh * (Nf/Nd).
= (3 x 10^-3 cm^3/sec) * 48 m * (0.4/2.4).
= 24 x 10^-5 m^3/sec.
Therefore, the discharge per meter length of the dam is 24 x 10^-5 m^3/sec.
(4)
Siddhant Subedi said:
2 years ago
The value of the coefficient of permeability = 3x10^-3 cm/s not cm^3/s.
(1)
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