Flood Proposal Assignment

Flood Proposal Assignment - Flood Finding Inc 517 Ball...

  • Homework Help
  • 3
  • 100% (1) 1 out of 1 people found this document helpful

This preview shows page 1 - 3 out of 3 pages.

You've reached the end of your free preview.

Want to read all 3 pages?

Unformatted text preview: Flood Finding Inc. 517 Ball Drive Hanover, IN 47243 November 20, 2013 Iohn Smith 1234 Wabash Lane Wabash, IN 46992 Dear Mr. Smith; We at Flood Finding Inc. have been working hard and are very pleased to present to you our findings of the 75-minute quadrangle ofthe Wabash River at Wabash, Indiana. Enclosed please find the following items: Table 1 consists ofthe data for the maximum annual flow for the USGS stream gaging station on the Wabash River at Wabash, Indiana; Table 2 consists of a spreadsheet showing the year, the stage, discharge (QM-ix], rank, recurrence interval, exceedence probability, and LOG QM; Figure 1 is the rating curve for the Wabash River at Wabash, Indiana; Figure 2 is the flood frequency curve for the Wabash River at Wabash, Indiana; and Figure 3 consists of the map showing the extent of the 100-year flood zone in the Wabash River at Wabash, Indiana USGS 75-minute quadrangle. W The IOU-year flood is not the flood that occurs every one hundred years. Rather, it is that in any given year, there is a one in one hundred chance, or one percent chance, that the maximum flow for that year will exceed the flow of the IOU-year flood. In other words, the exceedence probability of that year is one over one hundred. The recurrence interval is one hundred years. O-Y rFlo dM 1 To find the 100-year flood level ofthe Wabash River at Wabash, lndiana for any given year, the one percent mark had to first be found on the flood frequency curve, Figure 2, on the x-axis. Then, where 1.00% met the line on the graph of Figure 2 would correspond to the number on the y-axis. The y-axis represented the QM (cubic feet squared). The number that corresponded with 1.00% on the flood frequency curve is 45,400 cubic feet squared. This shows that there is a one percent chance that the water discharge will be at 45,400 cubic feet squared. Next, the rating curve, Figure 1, was looked at. Qmax is on the x-axis. 45,400 cubic feet squared on the x-axis corresponded to match the stage, measured in feet above the datum, on the y- axis, based on the curved line in the graph. lt corresponded with 24 feet above datum. Meaning that the water discharge would surpass the datum, which is the fixed started point at the gaging station, by 24 feet Then, on the USGS website for the gaging system on the Wabash River at Wabash, Indiana, Table 1, the gage datum is 642.66 feet about sea level, which is added to the 24 feet above datum to calculate how high up the water level would rise from sea level. The addition of the two numbers equals about 666 feet above sea level, which the 100-year flood model. This can be seen in Figure 3, which is the map of the 75-minute quadrangle of the Wabash River at Wabash, Indiana. Colored in blue is the area that would be affected by this flooding. Becgmmflldaflmlfi We recommend that you do not build anywhere within the blue shaded area of Figure 3 to avoid water and flood damage. Though there may be ways to prevent the flooding waters, such as an artificial levee. But with an artificial levee, ifbroken, could cause significantly more damage than if it had not been there. Another alternate could be channel straightening, which would increase the gradient of the stream channel, but would also increase potential flooding of areas downstream. We highly recommend that you look into building on an upland shoulder slope instead to ensure that flood damage is avoided. Best Regards, ...
View Full Document

  • Summer '14
  • VanIten
  • Geology

{[ snackBarMessage ]}

Get FREE access by uploading your study materials

Upload your study materials now and get free access to over 25 million documents.

Upload now for FREE access Or pay now for instant access
Christopher Reinemann
"Before using Course Hero my grade was at 78%. By the end of the semester my grade was at 90%. I could not have done it without all the class material I found."
— Christopher R., University of Rhode Island '15, Course Hero Intern

Ask a question for free

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern