7.7 A sand layer of the cross-sectional area shown in Fig. 7.27 has been determined to exist for a 800-m length of the levee. The hydraulic conductivity of the sand layer is 2.8 m/day. Determine the quantity of water which flows into the ditch in m'/min. Elv. 160 m Levee Elv. 145 m 1.6 m Ditch 180 m Impervious Sand

7.7 A sand layer of the cross-sectional area shown in Fig. 7.27 has been determined to exist for a 800-m length of the levee. The hydraulic conductivity of the sand layer is 2.8 m/day. Determine the quantity of water which flows into the ditch in m'/min. Elv. 160 m Levee Elv. 145 m 1.6 m Ditch 180 m Impervious Sand

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Related questions

Q: 4- Refer to Figure below. If H1=3 ft, H2=4.5 ft, h=1.5 ft, ysa=118.9 lb/ft³, area of the tank=6.25…

Q: The water table in an unconfined aquifer was at 10m below ground level. The bottom of this…

A: Transmissibility, T = KH K - hydraulic conductivity H - aquifer thickness of water bearing material…

Q: 5. In a deep saline water aquifer, there is a zone of fresh water of 100 ft depth. A well is drilled…

A: Given data Depth of saline water = 100 ft Depth of well = 80 ft Discharge from well = 0.5 cfs…

Q: Soil in a field has three layers. Each has a thickness of 3m, 4m, and 3m, from top layer to bottom…

A: H1=300cm H2=400cm H3=300cm

Q: 5. A constant-head permeameter containing very fine-grained sand has a length of 12 cm and a…

A: Find the hydraulic conductivity,K=?

Q: Q-2: Find the rate of flow in m³/sec/m (at right angles to the cross section shown in the following…

Q: 2. An aquifer has a hydraulic conductivity of 180 ft/day, and effective porosity of 33% and is under…

A: Given: Hydraulic conductivity= 180ft/day Porosity = 33% Hydraulic gradient= 0.0004 Required: Darcy…

Q: Water flows through a fully confined sand aquifer with a piezometric head gradient of 0.025. (a) If…

A: Given head gradient = hydraulic gradient i=0.025and hydraulic conductivity K=1.72 m/dayporosity…

Q: A 3.2 meter thick silty sand stratum intersects one side of a reservoir. The stratum has a hydraulic…

Q: An earth dam has conductivity kx = 4.5×10-8 m/s and ky = 1.6x10-8 m/s in the vertical and horizontal…

A: Given: An earth dam has conductivity in vertical and horizontal direction, kx=4.5×10-8 msky=1.6×10-8…

Q: A 3.2 meter thick silty sand stratum intersects one side of a reservoir. The stratum has a hydraulic…

Q: CALCULATION USING DARCY'S LAW An aquifer system is formed by two horizontal layers. Two piezometers…

Concept explainers

Field applications of hydraulic conductivity

Hydraulic conductivity is one of the hydraulic properties of soil defined as a measurement of the ability of a porous medium to permit water movement or fluid flow through it. It is denoted by the letter K. It is influenced by the density and viscosity of the fluid. It is also called permeability. Hydraulic conductivity is defined as the ratio of velocity to the hydraulic gradient. The different methods used to determine the hydraulic conductivity are laboratory methods (constant head permeability tests and falling head tests), in-situ field methods (pumping in and pumping out tests), small scale field tests (infiltration tests and slug tests), and indirect methods such as estimation from grain size, consolidation test data, and horizontal capillary test. The pedotransfer function (PTF) method is a specific empirical estimating approach employed in the soil sciences is also used to determine the hydraulic conductivity of the soil.

Question

7.7 A sand layer of the cross-sectional area shown in Fig. 7.27 has been determined
to exist for a 800-m length of the levee. The hydraulic conductivity of the sand
layer is 2.8 m/day. Determine the quantity of water which flows into the ditch
in m'/min.
Elv. 160 m
Levee
Elv. 145 m
1.6 m
Ditch
180 m
Impervious
Sand

Expert Solution

This question has been solved!

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

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Field Applications of Hydraulic Conductivity

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

3
Calculate the effective hydraulic conductivity for flow parallel and perpendicular to layering. Please show and explain the difference in values.
Given: r1 = 30 m h = 13.6 m r2 = 10 m h1 = 17.6 m H = 20 m h2 = 16.3 m t = 15 m d = 0.6 m ø Q = 13 L/s a.)Find the permeability of the aquifer in m/s. b.)Compute for the transmissivity of the impermeable layer in m2/s.
A circular tube of length 500 mm and cross-sectional area 50 cm2 is placed horizontally and filled with soil A of length 200 mm and soil B of length 300 mm. The head difference between the inlet and outlet of tube is 20 cm. The coefficient of permeabilities of soil A and soil B are 2 mm/s and 2.5 mm/s respectively. The discharge taking place through the soil A is cm3/s.
In order to compute the seepage loss through the foundation of a cofferdam, flownets were constructed. The result of the flownet study gave Nf = 6, Nd = 16. The head lost during seepage was 19.68 ft. If the hydraulic conductivity of the soil is k = 13.12 x 10-5 ft/min, compute the seepage loss per foot length of the dam per day. a.1.9 ft3/day/foot length of the dam b.1.95 ft3/day/foot length of the dam c.1.39 ft3/day/foot length of the dam d.2.9 ft3/day/foot length of the dam e.2.25 ft3/day/foot length of the dam
Soil Mechanics
2. The following description is correct ( ).A. the denser the grid in the flow network, the smaller the hydraulic gradientB. two points on the same equipotential line, the pore water pressure is always the sameC. the same flow network, any two adjacent equipotential line between the potential energy difference is equalD. The direction of the infiltration flow rate is the direction normal to the flow line 3. In the triaxial shear test, the test that keeps the pore pressure of the soil sample at zero throughout the process from the application of the circumferential pressure until the soil sample is damaged is ( ).A. Unconsolidated undrained test B. Consolidated drained testC. Solidification without drainage test D. Solidification fast shear test
A sand layer of the cross-sectional area shown in the figure has been determined to exist for a 800-m length of the levec. The hydraulic conductivity of the sand layer is 1.65 m/day. Determine the quantity of water which flows into the ditch in m/min. Elv. 175 m Levec Elv. 130 m 2 m Ditch 180 m Impervious O Sand
Problem 1. Consider a drainage system that consists of horizontal drains located at an elevation ho above the base of an unconfined aquifer of thickness b 10 m (see Figure 1). The recharge rate is r = 100 mm/yr, and the hydraulic conductivity of the aquifer is K = 1 m/d. The design condition of the drainage system is to avoid ponding at the ground surface. You can ignore the vadose zone for this problem. 1. Obtain the relation between the half-distance between drains, L, and the elevation of the drains, ho. Plot this function over the range of feasible lengths. 2. The cost of each individual drain can be split as the cost of the material (fixed) and the cost of installation (which is assumed to be proportional to the depth b – ho). If the fixed cost is $500 and the installation cost is $100 per meter of aquifer length per meter of depth, can you build a drainage system for less than $1 per meter of aquifer length? If so, what depth ho and spacing 2L would you choose? K= 1 m/day 2L = r…
Refer to the figure. If H1 = 1.94 m, H2 = 2.37 m, h = 1.c m, e =0.49, Gs = 2.67,area of the tank = 0.64 m2, and hydraulic conductivity of the sand (k) = 0.3d cm/sec. What is the upward seepage force per unit volume of soil?
A sand layer of the cross-sectional area shown in Fig. ?-b (page 2) has been determined to exist for a 500-m length of the levee. The hydraulic conductivity of the sand layer is 2.3 m/day. Determine the quantity of water which flows into the ditch in m3/hr.
1. Given a vertical flow in a stratified soil which consists of three layers, their depths are di, d2, and d3 and their hydraulic conductivities are ki, k2, and k3, respectively. Determine a weighted average hydraulic conductivity for the soil.