trench 80 ft long is excavated 500 ft away and is parallel to a riverbank. A sand aquifer is 40 ft thick The river water surface is 50 ft above the horizontal bottom of the aquifer. If the water depth in the trench must be maintained at 10ft, at what rate must water be pumped from the trench? How far from the trench will the aquifer cease to be saturated? Use K of sand = 30 ft/day

Q: Answer the question based on the figure given. Gravely sand Ysat = 18.5 kN/m³; Ym = 17.8 kN/m³ Sand…

A:

Q: sand: Ydry = 14.6 kN/m³; Ysat = 17.3 kN/m³ clay Yeat 19.3 kN/m³; LL = 38% e = 0.75 If uniformly…

A:

Q: : The lower sand layer sand layer in the soil profile of Figure 3a is in an artesian condition.…

A: Given;1 mg/m3 = 9.81 kn/m3

Q: R The hydraulic head that would produce a quick condition in a sand stratum of thickness 1.5 m,…

A: Given data : Void ratio (e)=0.67Specific gravity (G)=2.67Thickness =1.5 m

Q: A permeability pumping test was carried out in unconfined aquifer with the piezometric level before…

A:

Q: What is the coefficient of volume change (using change in void ratio method) for pressure range 100…

A:

Q: A double drain consolidation test was performed on a sample of marine clay. The thickness of the…

A: Double drainH = 50 mmk = 1.753x10-8 m/min = 300 KN/m2  = 500 KN/m2 e1 = 0.42e2 = 0.3

Q: : The lower sand layer sand layer in the soil profile of Figure 3a is in an artesian condition.…

A:

Q: A layer of sand 6 m thick lies beneath a clay stratum 5 m thick and above abed thick shale Inorder…

A: A )  Given data : Thickness of sand layer = 6 m Thickness of clay stratum = 5 m Discharge = 0.01…

Q: A permeability pumping test was carried out in unconfined aquifer with the piezometric level before…

A:

Q: Exploratory drill hole 12m 8m 4.5 m An exploratory drill hole was made in a stiff saturated clay…

A: Given data: w=22%Gs=2.16 water table is 8m above the sand layer.

Q: Q6: A saturated clay sample was consolidated in the triaxial cell under a cell pressure of 150 KN/m.…

A:

Q: 1. Given the structure and the flow net detailed in Figure 1. The coefficient of permeability (i.e.…

A:

Q: The lower sand layer sand layer in the soil profile of Figure 3a is in an artesian condition.…

A:

Q: B) ) A river bed consists of sand layer overlying impermeable rock; the depth of water is in river…

A:

Q: A 1.5 m thick strata of sand has a dry unitweight of 15 kN/m3. A contractor passes a vibratory…

A: To determine: The new thickness.

Q: A tube well of 30 cm diameter F uifer. The strainer length is 15 m. Calculate the yield fre 3 m. The…

A:

Q: A test well is to be constructed for dewatering purpose in a planned excavation for foundation. The…

A: To draw the spring and decide the boundaries, we first need to comprehend the idea of drawdown,…

Q: 3. In order to determine the equivalent permeability of a site approximately, a colored paint is…

A: Time required to reach from A to B = 100 hours Difference between GWT level A and B, h = 4.6 m

Q: A stratum of normally consolidated clay of thickness 10 ft is drained on one side only. It has a…

A:

Q: The coefficients of permeability of a soil in horizontal and vertical directions are 3.48 and 1.5…

A:

Q: 3. Refer to figure shown. Determine H. H '6 m . 4.1 m Saturated clay Ysat=17.5 kN/m³ Sand: Y = 16…

A:

Q: The diagram of a sand drain is shown in Figures 16.21 and 16.22. Given: rw = 0.25 m, rs = 0.35 m, de…

A: Solution: a) Calculate degree of consolidation of sand drains using formula; Tv=π4Uv1002Here, Tv=…

Q: O A 1.25 m layer of soil (n = 0.35; G = 2.65) is subjected to an upward seepage head of 1.85 m. What…

A: Depth of soil layer (h) = 1.25 m G = 2.65 Porosity = 35% = 0.35 Void ratio (e) = Porosity/ (…

Q: A bed of uniform sand having particle size 0.66 mm diameter and specific gravity of 2.65, porosity…

A:

Q: A dam shown in Figure Q1 (c) retains 6m of water. A sheet pile wall on the upstream side (which is…

A:

Q: 1. (30 pts) The soil profile shown below consists of 10 meters of sandy silt overlying gravel. The…

A: Step 1:Step 2: Step 3: Step 4:

Q: exploratory drill hole was made in a stiff saturated clay (Gs = 2.72, and w = 35%). The sand layer…

A:

Q: Question attached

A: Given: The dry unit weight of soil is 112 pcf. The specific gravity of soil is 2.63. The…

Q: An exploratory drill hole was made in a stiff saturated clay (see Figure 9.9). The sand layer…

A: Solution given next step

Q: A soil has a discharge velocity of 6 x 10-7 m/s and a void ratio of 0.5. What is its seepage…

A: Given - Discharge velocity, (V) = 6 × 10-7m/s Void ratio  = 0.5   To find - Seepage velocity (Vs) =?

Q: layer of stiff saturated clay is underlain by a layer of sand (Figure 9.5). The sand is under…

A: Effective stress at 'A"σ=8.1-H18.9Pore pressure at A isuA=3.569,81

Q: How high should the groundwater table be so that the effective stress at C is equal to 110 kPa?…

A: Given data in question  Effective stress at C Void ratio Specific gravity  To find out  Depth of…

Q: For the given soil profile, compute the effective pressure at a depth of12m. G.L n = 0-4 G = 2-65 S…

A:

Q: Consider the consolidation situation below and answer the questions. 200 kPa 200 kPa Water Table…

A: Note :- diagram is not required in solution. So not redrawing the same diagram again.  Given :-…

Q: B) For the soil condition shown in Figure (1). Determine: 1- The rate of flow per unit area. 2- The…

A:

Q: Calculate the total, effective and pore-water pressures in point B. 3 m Lake Water Sand 10 m Unit…

A: To determine: The total, effective and pore water pressure at B.

Q: a. Calculate the effective pressure at point C. b. Find the seepage force per unit volume in kN/m³.…

A:

Q: T T Yw =1- m3 Yc = 2.4 m3 (Note T is ton ) H = 0.60 (coefficient of friction between the base and…

A:

Q: Compute geostatic stress at point A y=15.0 kN/m³ 7 Y= 16.8 kN/m³ Y= 17.2 kN/m³ 2.0 m 2.5 m 3.6 m…

A: Given- Depths of the soil profile and their unit weights are given as shown in the figure. Unit…

Q: How much is the strike separation (i.e., line AB on the map)? Scale: 18mm = 100m 82m 181m 67m 24m O…

A: AB = 32 mm

Q: a. Compute the effective stress at C in kPa b. Compute the critical hydraulic gradient

A: solution  From the given date  void ratio e = 0.51 and specific gravity G= 2.719 find the saturated…

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.