Chapter 10, Problem 10.5P

A clay layer 5 m thick has double drainage. It was consolidated under a load of 127.5 kN/m2. The load is increased to 197.5 kN/m2. The coefficient of volume compressibility is 5.79 × 10^–4 m2/Kn and value of k = 1.6 × 10^–8 m/min. Find settlement in cm at 50% consolidation. a.25.78 b.10.32 c.32.56 d.20.27

Given the following data for a stream of uniform flow: A = 8.98 sq.m. (average stream cross section) P = 10.76 m (Wetted perimeter) S = 0.008 (slope of stream bed) n = 0.020 (roughness coefficient). Assuming a constant stream bed slope and little variation in the cross section and condition of the bed, determine the Hydraulic radius

A triangular SCS hydrograph (with excess rainfall Re=10mm and duration D=1hr) U(1,t) is illustrated below. The basin area is 24 km2.1.Estimate the values of Tc, Tp, Tr, Tb, and Qp.2.Determine U(2,t) by using the S-hydrograph method.

Given: velocity of flow = 0.0375 m/s coefficient =0.05 m/s porosity p =48% slope S = 3/4 The soil porosity in the area where the 46-cm diameter well is 48%, find the discharge of the groundwater. Given the coefficient =0.05 m/s and porosity p =48%, find the transmissibility (T) in m/s per unit m, if the aquifer width is 1.2 m. Given the discharge Q get in Question #1, transmissibility T in Question#2, slope S = 3/4; find the aquifer width X.

(Question: 4: A well with a storage coefficient of 0.05 m/s has a slope define by rise = 3 and run = 4. Find the velocity of flow using Darcy’s equation.)The soil porosity in the area where the 46-cm diameter well in Question#4 is 48%, find the discharge of the groundwater.

Referring to the basic concepts for studying lateral earth pressures, calculate the magnitude of lateral force resulting from an active soil pressure against the back of a frictionless wall 6 m high. The surface behind the wall is level, with the retained soil having an angle of internal friction equal to 37° and a unit weight of 18 kN/m3.

Given the discharge Q in Question#5, transmissibility T in Question#6, slope S in Question#4; find the aquifer width X. Question 4: A well with a storage coefficient of 0.05 m/s has a slope define by rise = 3 and run = 4. Find the velocity of flow using Darcy’s equation. Question 5: The soil porosity in the area where the 46-cm diameter well in Question#4 is 48%, find the discharge of the groundwater. Question 6: Given the coefficient k in Question#4 and porosity p in Question#5, find the transmissibility (T) in m/s per unit m, if the aquifer width is 1.2 m.

Aquifer area extent 100 km/sq is overlain by 4 strata as given below: Strata 1 (top): Thickness = 1, Kx (m/day) = 1, Ky (m/day) = 0.25 Strata 2: Thickness = 3, Kx (m/day) = 2, Ky (m/day) = 0.3 Strata 3: Thickness = 2, Kx (m/day) = 1.5, Ky (m/day) = 0.2 Strata 4: Thickness = 4, Kx (m/day) = 0.025, Ky (m/day) = 0.005 (1) If a 4 hour storm occurs producing a total rainfall of 100mm, estimate the recharge into the aquifer assuming the piezometric surface in the aquifer is at the bottom layer 4 and all layers are saturated. (2) If the 4 layers are underlain by an impermeable strata instead of aquifer. Estimate the lateral flow per unit weight through the layers ASSUMING that the layer is deep by 0.1%

A rectangular channel with a width of B = 2 m drains water with a discharge of Q = 2,4 m3/s. The depths of water at an adjacent point are 1,5 m and 1,4 m. If the Chezy coefficient is 50 and the slope of the Io channel base = 0,0004, calculate the distance between the two faces. Continue to normal depth with the direct step method.