fer to the cross section of the earth dam shown in the figure. Calculate the rate of seepage through the dam (q in m³/ min /m) using L. Casagrande's method. 5 m IV : 2H 30 m 1V : 2H 25 m k = 3 x 10-4 m/min

fer to the cross section of the earth dam shown in the figure. Calculate the rate of seepage through the dam (q in m³/ min /m) using L. Casagrande's method. 5 m IV : 2H 30 m 1V : 2H 25 m k = 3 x 10-4 m/min

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter8: Seepage

Section: Chapter Questions

Problem 8.12P

See similar textbooks

Related questions

Q: A flownet is given below for flow under a concrete dam. The dam is 60 m long and has two 10 m sheet…

Q: well is sunk through an unconfined aquifer and is pumped at a constant rate. The draw-down in he…

Q: Draw a flow net for the weir shown in the Figure. Calculate the rate of seepage under the weir in…

A: We have to draw a flow net for the weir shown in the Figure. Calculate the rate of seepage under the…

Q: Determine the total seepage loss per meter length of the dam (in m/day/m). Given X = 18 m; Y = 4 m;…

A: From figure:NF=number of flow channels=4ND=number of equipotential depths=10we have…

Q: 7.9 Refer to Figure 7.29. Find the flow rate in m'/sec/m length (at right angles to the cross…

Q: 2. A 20-cm-diameter confined-aquifer well is pumped at a constant rate of 15 L/s. After 10 days of…

Q: 18 A non isotropic soil supporting the dam as shown in the figure. The flow net has 4 flow channels…

Q: Two reservoirs are connected through a homogeneous and isotropic aquifer having hydraulic…

A: Given data Length (L) = 2km = 2000 m Porosity (n) = 0.3 Hydraulic conductivity (K) = 25 m/day

Q: Water flows in a trapezoidal channel of 2 m width and side slope at 1:1. At upstream depth of 2 m,…

Q: A section of a homogeneous earth dam is shown in the Fig.1. Calculate the seepage discharge per…

A: An earthen dam is a dam developed by compacting the progressive layers of earth across the stream…

Q: For the dam shown in figure: 1. Compute the seepage quantity. 2. Compute the uplift pressure at…

Q: S. A well of diameter 20 cm fully penetrates a confined aquifer. After a long period of pumping at…

Q: A)Prove and interpret whether the hydraulic conductivity is correctly predicted B)Calculate and…

Q: A 5 m wide rectangular channel carrying a discharge of 14 cumec. A hydraulic Jump occurs in such a…

A: Discharge (Q) =14 m3/s Depth before jump (d1) =0.3m g= 9.81 m/s2 Width of channel = 5m

Q: The flow net constructed for the dam is shown in the figure below. -50 m- 6.3 m 1.6 m 9.4 m 17.2 m…

Q: . In an oil-water system, the following fluid and rock data are available: h = 60' h, = 25' Po =…

A: Critical flow rate is generally the minimum flow rate that keeps biofilm deposits from forming on…

Q: A sand layer of the cross-sectional area shown in the figure has been determined to exist for a…

A: step 1-

Q: cm well penetrates 25 m below the static water table. After 24 hours oI pumping out at the rate of…

A: Given data in question Radius of well 20 cm Rate of pumping 800 lpm Radius of testing wells 20 m…

Q: An earth dam is shown in (Figure 1). Determine the seepage rate, q, in m³/day/m Length using…

Q: 10.67 In a rectangular channel 4 m wide flow of 7.65 m/s the depth is 0.4 m. If a hydraulic jump is…

A: We have equation2q2g=y1y2y1+y2

Q: A well is installed in a unconfined aquifer. Determine the drawdown (ft) at the well if: the radius…

A: R=500ft H=95ft

Q: An earth dam is shown in the figure below Determine the seepage rate, q, in m^3/day/m length. Given:…

A: Using Scaffernak's method FInd the value of…

Q: A 20 cm diameter well penetrates an Artesian aquifer, 35 m thick. The discharge from this well for a…

A: Given that,

Q: 4 The figure shows the cross-section of a levee that is 500 m long and is underlain by a 2-m-thick…

A: Problem is solved and simplified as below.

Q: Two reservoirs are connected through a homogeneous and isotropic aquifer having hydraulic…

A: given haduralic conductivity (k) = 25m/day effective porosity (n) = 0.3…

Q: Flow net under a concrete dam is shown in the following Fig. Q. 3(d). Calculate and plot the water…

A: By knowing the flow net , water distribution varying linearly with maximum at the upstream and…

Q: Two reservoirs are connected to each other with a pipe of length of 2 km and diameter 0.2 m.…

A: Given: Length, L = 2 km Diameter, d = 0.2 m Difference in water level, h = 8 m Friction factor, f =…

Q: 12. For the Dam shown in the figure a) Draw the flow net in the soil under the dam b) Calculate q…

A: Note :- nothing said about how many flow lines and equipotential lines to be drawn so taking it as…

Q: The results of flow net analysis for a particular dam are as follows: • Number of flow channels = 6…

Q: Water flows at a rate of 0.020 m 3/s from reservoir A to reservoir B through three concrete pipes…

Q: Q2 Calculate the rate of seepage q in m3/hr/m for the earth dam shown in figure below by one of them…

A: Seepage: The flow of water through soil is known as seepage. Seepage generally takes place when the…

Q: An earth dam is shown in Figure, Determine the seepage rate, q, in m3/day/m length. Given: α1 =α2…

A: Given: α1 =α2 =45o , L1=15m , H=30m, H1=40m, K=4.2 ×10-4m/min

Q: A 6cm diameter horizontal water pipe expands to a 10cm diameter pipe. The average velocity and…

Q: Example 10: Water is released from a 3 m deep reservoir into a 6 m wide open channel through a…

Q: The distance between two pumping wells is 100 m. The transmissivity of the confined aquifer, which…

A: Given data: Transmissivity of the confined aquifer T= 1000 m2 / day Radius of influence for each…

Q: alculate the rate of seepage q in m3/hr/m for the earth dam shown in figure below by one of them :…

A: Seepage is the slow runaway of water or gas through the small holes or through porous surfaces into…

Q: A 300 mm diameter test well penetrates 27 m below the static water table. After 24 hours of pumping…

Q: Answer with True or False for the following 1. Percolation is the movement of water within soil…

A: 1. The percolation is the downward movement of water into the soil through the interconnected voids…

Q: Example 2.10 A rectangular channel has a width of 2.0 m and carriers a dis- charge of 4.80 m'/s with…

Q: (b) Seepage takes place beneath a concrete dam as shown in Figure Q3. The soil beneath the dam is…

A: (a) The flow rate beneath the dam is calculated as, q=kHNfNd=4.2×10-4 cm/sec×10-2×24×3600 m/day1…

Q: The figure is a section of a masonry dam resting on a previous foundation and subjected to water…

Q: A 400 mm diameter test well penetrates 27 m below the static water table. After 24 hours of pumping…

A: The diameter of well, D =400mmThe depth of well, H=27mDuration of pumping =24 hours = 1…

Q: Q2. A flowrate of 1.2 m³/s is supplied from a drinking water dam lake (reservoir), which has been…

A: The flow of fluid includes movement of an unbalanced fluid. As long as unequalled forces are in…

Q: The flow net constructed for a dam is shown in the figure below. Taking coefficient of permeability…

Q: For the flow net shown below, the soil saturated unit weight is 20 kN/m³, water unit weight is 10…

A: NOTE : As per our guidelines we are supposed to answer first three sub parts kindly repost other as…

Q: The steady state BOD concentration in the KTR lake is 90 mg/L.Water flows out of the reservoir in a…

A: given data: K=5.9 day-1velocity=20 Km/hourLo=90 mg/L

Q: Q3: The figure represents a homogeneous earth dam with a 15he horizontal filter (25 m). The…

Q: The dam and flow net shown in the attached picture. The dam is 120 m long and has two 10 m sheet…

A: From diagram above ; Number of flow lines = 2.4 Number of Equipotential drops = 10.4

Q: Example 4.4 A fully penetrating artesian well is pumped at a rate Q = 1500 m³/day from an aquifer…

Q: 4 pts In the dam figure with assumed 1 meter strip: water depth D=9m, dam height H=12m, and dam base…

Concept explainers

Principles of Seepage

In hydrology, when water flows down in a pore or crack of unsaturated soil due to gravity, the deep layer of soil is called seepage. It is the slow movement of water in the soil layer. Seepage is mainly found near hydraulic structures and is responsible for the stability of earthen-type hydraulic structures.

Question

An earth dam is shown in the figure below. Determine the seepage rate. Given: a1=48 degrees, a2= 30 degrees, L1=6m, H 17m, H1=21m and k=0.007 cm/s. Use L.Casagrande Method

Refer to the cross section of the earth dam shown in the figure. Calculate the rate of seepage through the dam (q in m/ min /m) using L. Casagrande's method.
+5 m
1V: 2H
30 m
1V: 2H
25 m
k = 3 X 104 m/min
Impermeable layer
Round your final answer to three significant figures.
q =
×10-4 m³/ min /m

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step by step

Solved in 2 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.

Similar questions

An earth dam is shown in the figure below Determine the seepage rate, q, in m^3/day/m length. Given: α1=35°, α2=40°, L1=5 m, H=7 m, H1=10 m, and k= 3x10^4 cm/sec.
An earth dam is shown in Figure, Determine the seepage rate, q, in m3/day/m length. Given: α1 =α2 =45o , L1=15m ,H=30m, H1=40m, K=4.2 ×10-4m/min
Refer to the cross section of the earth dam shown in the figure. Calculate the rate of seepage through the dam (q in m^3 / min / m) using L. Casagrande’s method
.An earth dam is shown in Fig 4 . Determine the seepage rate, q, in m3/day/m length. Given: α1 =350, α2 = 400, L1 = 5 m, H =7 m, H1 =10 m, and k =3 x 10 -4 cm/sec. Use Schaffernak’s solution.
The section of a concrete gravity dam with its flow net diagram is shown in Pigure 10.38. The coefficient of permeability of the soil (anistropic) in the vertical and horizontal directions are 0.25 m/day and 0.58 m/day, respectively. The length of dam perpendicular to the paper is 120 m. 1. Determine the number of pressure drops 2. Determine the seepage loss 3. Determine the total amount of water percolated in one year.
The following data relate to a pump-out test: Diameter of well = 24 cm; Thickness of confined aquifer = 27 m; Radius of circle of influence = 333 m; Draw down during the test = 4.5 m; Discharge = 0.9 m^3/s.What is the permeability of the aquifer in mm/s? Choices: a. 2.15 x 10^-2 b. 4.5 x 10^-1 c. 93 X 10^-1 d. 1.6 X 10^-1
The rectangular channel shown in the following figure has a width of 10 ft and transports water at 19,229 ft3/min. If the elevation of the channel bed drops by 0.75 ft, determine the specific energy (in ft) after the depression. Provide your answer with two decimals. Note: The solution method is the same as for a rise except the Δh term will be negative to account for the depression.
The figure below represents a system with flow in the horizontal direction. Find the value of each pressure charge, level charge, and total charge in A, B, C, D, E, F, G, plus the real and approximate velocity of water flow plotting all of the above, given that soil porosity = 0.33 and transmittance coefficient = 0.50 cm/sec
Take note: Answer and write your solution on a clean paper clearly. During a flood flow the depth of water in a 12 m wide rectangular channel was found to be 3.5 m and 3.3 m at two sections 300 m apart. The drop in the water-surface elevation was found to be 0.18 m. Assuming Manning’s coefficient to be 0.023, determine the following: a. Average value of k? b. Estimate the flood discharge through the channel ?
For the two-dimensional flow system shown below (units in meters):Compute the total flow rate under the Dam. X = 4, Y = 8. Note 1: Point A is located in the middle point of the equipotential lines. Point B is located in the middle point of the flow lines.Note 2: Assume e=0.8 (void ratio) and k=10^-3 cm/s (coeff. of permeability).Note 3: Datum is located at the bottom level of the water (right side of Dam).Note 4: Remember, the figure is drawn to scale. So, use the value of 2X+Y to estimate any dimension that you consider necessary.
High velocity water flows up an inclined plane, as shown in Figure 5 .1 What are the two possible depth of flow at section 2? Neglect al losses.
For a falling-head permeability test, the following are given:length of specimen = 380 mmarea of specimen = 6.5 cm2k = 0.175 cm/minWhat should be the area of the standpipe for the head to dropfrom 650 cm to 300 cm in 8 min?