How far downstream must your assistant go to collect

Assignment Help Civil Engineering

Reference no: EM13322735

You are in charge to investigate the characteristic of a small river that can be assumed as a uniform and rectangular cross-section for modeling purpose. The width of the river is 10 ft, the depth is 1 ft, longitudinal slope of 0.001, and the Manning's coefficients is 0.03. To estimate travel times and dispersion coefficients, you injected 50 gm of rhodamine dye at one bank of the river because it will spread out soon enough. You also began the steady bubbling of propane, a gaseous tracer into the river at this location.

a. Your assistant is measuring the rhodamine concentration 1 km downstream. The data when converted to a spatial distribution at t = 2500 sec after dye release, show the following: 95% of the mass lies between 800 m and 1200 m at time t = 2500 sec. Estimate the longitudinal dispersion.

b. Your other assistant is measuring the propane (C3H8) concentrations, which are 75 microM at 200 m downstream and 52 microM at 1500 m downstream. What is the reaeration coefficient if it is assumed that no dilution occurred due to lateral flow?

c. How far downstream must your assistant go to collect the sample near shore that is representative of the entire channel cross-section?

Reference no: EM13322735

Questions Cloud

Explain solutions prepared by diluting volumes of solution a : Calculate the [SCN-] solution A, where 5.7 mL of 2.910?3 M NaSCN is diluted to 44.0 mL with 0.1 M Fe(NO3)3. Next calculate the [FeSCN2+] in the solutions prepared by diluting volumes of solution A with 0.1 M Fe(NO3)3 to a final volume of 1.0101 mL..

What are the initial and final temperatures of the gas : Two moles of an ideal diatomic gas have an initial pressure of 4:00 atm and initial volume of 16:0 L. What are the initial and final temperatures of the gas

Write a program that uses a bag of strings to keep track : if you know how to read and write strings from a file,then have the program obtain its initial list of chores from a file. When the program ends, it should write all unfinished chores back to the file.

Explain the resulting ph when .005 moles of koh is added : What is the resulting pH when .005 moles of KOH is added to .1 L of buffer solution that is .100 M in H2PO4- and .100 m HPO4^2- and the Ka2 = 6.2x10^-8

How far downstream must your assistant go to collect : The width of the river is 10 ft, the depth is 1 ft, longitudinal slope of 0.001, and the Manning's coefficients is 0.03. To estimate travel times and dispersion coefficients, you injected 50 gm of rhodamine dye at one bank of the river

Explain the kantian arguments denis arnold and norman bowie : Explain the Kantian arguments Denis Arnold and Norman Bowie use in "Sweatshops and Respect for Persons" to support the claim that MNEs have duties to ensure that their off-shore contract factories meet minimum safety standards

Use game theory to to set up a game designed : Write a paper that uses game theory to to set up a game designed to help a consumer decide whether to buy life insurance or not.

Calculate and display the percentage of calories : Once correct data has been entered the program should calculate and display the percentage of calories that come from fat.Use the following formula: percentage of calories from fat=(fat grams x 9) / calories

Create a program that calculates fat grams and calories : john raymond was so pleased with the program you created for his clients that he regers you to his coworker,a nutrionist in the same facility.

User Account

All Pages