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

In this problem you will design a digital stopwatch with

In this problem you will design a digital stopwatch with the following characteristics: Its display will consist of two two-digit decimal numbers representing minutes and seconds. The smallest display will be OO:OO, the ...

A worker applies the forces p -10i 8j lb and q 10i lb to

A worker applies the forces P = -10i + 8j lb and Q = 10i lb to the handgrips of the electric drill. These forces are equivalent to the force R = 8j lb acting at the tip of the drill and the couple C R = -120j lb · in. De ...

1 describe the construction of underlayment-grade plywood

1. Describe the construction of UNDERLAYMENT-grade plywood. How is it used in floor construction? 2. A single-layer floor system is used to support a floor dead load of 10 psf and a floor live load of 75 psf. Panels with ...

1 devise a scheme for representing rational numbers as

1. Devise a scheme for representing rational numbers as binary strings. Briefly describe algorithms for performing addition and comparison using your scheme. 2. Devise a scheme for representing rational numbers and ratio ...

The massachusetts bay transportation authority mbta has

The Massachusetts Bay Transportation Authority (MBTA) has just awarded you a contract to revamp the signaling system on its Green Line. You have decided upon the following basic approach: Each section of track will have ...

For the following velocity fielda determine the

For the following velocity field: (a) determine the acceleration, noting the local and convective components; and (b) determine the location of the maximum acceleration:

A pitot tube uses a manometer readout with a fluid having a

A Pitot tube uses a manometer readout with a fluid having a specific gravity of 0.82. The tube is oriented parallel to an airstream at 1 atm, 25?C, having a velocity of 30 m/s. The accuracy of the dynamic pressure measur ...

The step response transform of a linear circuit isa is the

The step response transform 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 gai ...

The homogeneous cylinder of weight w and radius r rests in

The homogeneous cylinder of weight W and radius R rests in a groove of width 2b. Determine the smallest force P required to roll the cylinder out of the groove. Assume that there is enough friction to prevent slipping.

1 how large a rom is necessary for the implementation of an

1. How large a ROM is necessary for the implementation of an arbitrary N-input Boolean function? 2. How many bits of information are stored in a ROM having n inputs and m outputs? 3. Using a PLA, implement the priority-e ...

  • 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