Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Civil Engineering Expert

An environmental consulting firm is conducting a site investigation on the abandoned industrial site which is 200 m by 150 m in size shown in figure. A number of piezometers were installed on site to get information about the subsurface aquifer. Geologic samples were obtained from the drill cuttings and sent for analysis. Hydraulic conductivity of the aquifer solids was found to be 0.32 m/d and the porosity was found to be 0.36.

The groundwater hydraulic gradient was found to be 0.0012, sloped downward to the southwest corner of the site, and oriented at 35 degrees to the south western corner of the site. Groundwater head was measured to be 92 m above mean sea level in a piezometer which was located at the southwest corner of the site. The general relationship between head and location in a 2-dimensional aquifer is as follows:

 H(x,y)= H(x0 ,y0 )+ (x- x0 )*cosΘ*(dh/dl) +(y-y0)* sinΘ*(dh/dl)
Where H(x0,y0) is the head measured at the location (x0,y0), θ is the angle that the hydraulic gradient makes with the line y=y0 (i.e., the horizontal line that intersects x0, y0), dh/dl is the magnitude of the hydraulic gradient. The following plan view represents information about the hydraulic gradient at the site:

997_Hydraulic gradient.jpg

1.a. Sketch a flowsheet of the steps which you will take to simulate the groundwater aquifer at this site by computing the groundwater head with the spatial resolution of 1 meter in the x-direction and 1-meter in the y-direction. Make sure to note how you plan to organize data with scalar, vector and matrix elements.

b. prepare a well-documented MATLAB program to simulate the groundwater aquifer at this site by computing the groundwater head with a spatial resolution of 1 meter in the x-direction and 1 meter in the y-direction. You must describe the rationale for any supporting calculations or assumptions made.

c. Create a contour plot of head values in the x-y plane. This plot is a ‘bird’s-eye’ view of the topographical contours of constant head on the water table.

d. Create transect (also called cross-section) plot showing vertical head as a function of distance:

i. In x-direction, at the distance of 30 m north of the southwest corner of the site.

ii. In y-direction, at the distance of 56 m east of the southwest corner of the site.

2. Characteristic properties of the aquifer could be used to compute groundwater velocities, vgroundwater(L/T), according to:

Vgrounwater=KH/η (dh/dl)

where KH (L/T) is hydraulic conductivity of the porous media in the aquifer, η is the porosity of the porous media, (dh/dl) is the hydraulic gradient. Note that the velocity of groundwater only has meaning in the direction of the hydraulic gradient that is always perpendicular to contour lines of constant head.

a. Compute velocity of groundwater at this site.

b. Supposing that hydraulic gradient is constant in the region around the industrial site, use the groundwater velocity to compute the travel time between a spill located at 75 m east and 75 m north of the southwest corner of the site and a private groundwater well located 36 m south and 4 m east of the southwest corner of the site. Note that these locations are located on a line parallel to the hydraulic gradient and perpendicular to your contour lines.

Civil Engineering, Engineering

  • Category:- Civil Engineering
  • Reference No.:- M91512

Have any Question? 


Related Questions in Civil Engineering

The door header in fig 7c supports a dead load of 120 lbft

The door header in Fig. 7.C supports a dead load of 120 lb/ft and a roof live load of 120 lb/ft. Lumber is No. 2 Hem-Fir. C M = 1.0, C t = 1.0, and C i = 1.0. There are no bolt holes at the point of maximum moment. Later ...

A binary-to-seven-segment decoder takes 4 bits of input and

A binary-to-seven-segment decoder takes 4 bits of input and produces seven outputs, one for each "segment" in a standard display: Given the appropriate binary input, this display produces outputs that light up the displa ...

The force acting at a is f 10i 20j - 5k kn knowing that

The force acting at A is F = 10i + 20j - 5k kN. Knowing that the moment of this force about the y-axis is 8j kN · m, determine the distance b and the moment of F about point O.

Determine the force-couple system with the force acting at

Determine the force-couple system, with the force acting at point O, that is equivalent to the force and couple acting on the arm CD of the industrial robot. Note that the arm ABCD lies in a vertical plane that is inclin ...

Step response of an rlc bandpass circuit the step response

Step Response of an RLC Bandpass Circuit The step response of a series RLC bandpass circuit is (a) Find the passband center frequency and the two cutoff frequencies. (b) Design a circuit that would possess the above step ...

1 is it possible for a one-input one-output combinational

1. Is it possible for a one-input, one-output combinational circuit built entirely of two-input NAND gates to contain a hazard? Either draw such a circuit or explain why one cannot be built. 2. Is it possible for a Combi ...

Assume that all gates have a propagation delay tpd and a

Assume that all gates have a propagation delay t pd and a rise time t,. What is the maximum propagation delay and rise time of the following circuit?

The step response of a linear circuit isa is the circuit a

The step response of a linear circuit is (a) Is the circuit a low-pass, high-pass, bandpass, or bandstop filter? (b) Construct the straight-line Bode gain plot and estimate the cutoff frequency and passband gain. (c) Use ...

A divide-by-2 counter has the following specificationdesign

A divide-by-2 counter has the following specification. Design a divide-by-2 (that is, l-bit) counter using only one D flip-flop. You may also include any combinational logic you wish in your design, butry to minimize the ...

Te forces p and q act on the handles of the wrench if p

The forces P and Q act on the handles of the wrench. If P = 32 lb and Q = 36 lb, determine the combined moment of the two forces about the z-axis.

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro

Describe what you learned about the impact of economic

Describe what you learned about the impact of economic, social, and demographic trends affecting the US labor environmen