CE 4260 Spring 2021 BLE Model Mini-Project_April_15_2021

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Apr 26, 2024

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CE 4260 Spring 2021 FEMA BLE Assignment: Using FEMA BLE Models to Inform Design Through its contractors, FEMA develops Base Level Engineering models of watersheds. - On February 2, 2021, Ryan Clark made a presentation on the intended uses and applications for these models. - On March 4, 2021, Bridget Bailey gave a guest lecture talking about the flooding (March and August 2016) flooding in Tangipahoa Parish. She also discussed their efforts for more effective planning and design to protect their residents, while continuing to enable and promote economic growth. - On March 12, 2021, Colin Anderson provided some background on how the BLE model is developed and structured, and how to look at and interpret results. Colin showed some examples (water surface elevations and flows) from 10yr and 100 yr rainfall event scenarios that included the entire watershed “without projects”, individual reservoirs/dams located on four tributaries (Terry’s Creek; Bala Chitto; Beaver Creek; Big Creek); and if all four reservoirs/dams were implemented at once. In place of your working directly with the HEC-RAS BLE model of the Tangipahoa River, we have designed a short exercise and provided you with some of the model outputs. The objective of this exercise is for you to use flow and maximum water surface elevation data, that has been extracted from the BLE Model, plot the data, and make some observations and comments about the effectiveness of upstream detention for the scenarios you have been assigned. Below the table are detailed step-by-step instructions for where to find the data and what I want for the final powerpoint. Think of the final powerpoint as something that you would use in a presentation to Bridge Bailey and/or stakeholders, officials, etc. from Tangipahoa Parish about the use of the BLE model to look at the effectiveness of different upriver detention (reservoirs) on mitigating flooding. Individual scenarios (note: in addition to your individual scenario, everyone will use Base Case (no reservoirs) and All Reservoirs) Base Case All Reservoirs Specific Reservoir Event Alexander, Silas IV Y Y Bala Chitto 10 Alhemeiri, Khalifa Mohammed Y Y Beaver Creek 10 Amous, Ahmad O Y Y Big Creek 10 Batts, Atrevius D Y Y Terry's Creek 10 Brading, Blaine Y Y Bala Chitto 100 Brothers, Jeffrey Patrick J Y Y Beaver Creek 100 Castro, Roberto Jr Y Y Big Creek 100 Celaya-Hernandez, Juan Manu Y Y Terry's Creek 100 Cook, Allison G Y Y Bala Chitto 10 Fontenelle, Daniel M Y Y Beaver Creek 10

Fontenot, Amanda Marie Y Y Bala Chitto 10 Frey, Garrett Martin Y Y Big Creek 10 Guillory, Wesley Joseph Y Y Terry's Creek 10 Hagan, James Austin III Y Y Bala Chitto 100 Hamilton, Clare Y Y Beaver Creek 100 Hatcher, Alex Edward Y Y Big Creek 100 Hebert, Hunter Y Y Terry's Creek 100 Hunt, Dalton T Y Y Bala Chitto 10 Hutchinson, Kirk A Jr Y Y Beaver Creek 10 Kazmyrskyi, Viktor Y Y Big Creek 10 Kyle, Franklin Y Y Terry's Creek 10 Lafleche, Ory Kaelyn Y Y Bala Chitto 100 Lenich, Todd Robert Y Y Beaver Creek 100 Macaluso, Basil Vincent Y Y Big Creek 100 Mudd, Julia C Y Y Bala Chitto 100 Ortiz, Kimberly Y Y Y Terry's Creek 100 Qulaq, Khaled Bashir Y Y Bala Chitto 10 Ray, Mason T Y Y Beaver Creek 10 Resendez, Lance M Jr Y Y Big Creek 10 Riggins, Joshua Marcus Y Y Terry's Creek 10 Rizzo, Jonathan Mitchell Y Y Bala Chitto 100 RobertsonIII, Dennis James Y Y Beaver Creek 100 Rodriguez-Fierro, Priscilla Y Y Big Creek 100 Rullman, Evan A Y Y Terry's Creek 100 Salopek, Sophie Grace Y Y Bala Chitto 10 Weems, Matthew S Y Y Beaver Creek 10 Wilson, Alyssa L Y Y Big Creek 10 Wolf, Benjamin Andrew Y Y Terry's Creek 10 Wolff, Brandon Y Y Terry's Creek 100 Ziegler, William Wren Y Y Bala Chitto 100 Instructions: 1. Each of you is to use the combination of reservoir and return period (e.g., Terry Creek 10 year) that is in the table above. 2. There are three files that you will use for this assignment. a. Powerpoint file that has figures showing where the reservoir dams are located and the cross-sections where the data was extracted from.

b. The two spreadsheets contain the flow (w/ time) and maximum water surface elevation data at various station locations along the profile line for the 10 and 100 year events. c. The three files are all located in https://lsumail2-my.sharepoint.com/:f:/g/personal/cwillson_lsu_edu/Eig1N- 16cRBHvjGYdp_S79kBmBJzX8-lwD2QVfX46-L9iQ?e=sCao23 3. Each of you is to prepare an 8-10 slide powerpoint file showing pertinent results for your “scenario” (e.g., Terry’s Creek 10 year event) and providing some discussion analysis. Here is a suggested path to working on this (using Terry’s Creek 10 year as an example) Open the powerpoint (BLE_Class_Activity) file and look at the figures. 1. You will need to look at both the Robert location and your “location”. For example, the Robert location is shown on slide 8 and Terry’s Creek location on slide 5. 2. On each of the figures are two read lines that show the location where the flow and water surface elevation data was extracted from. For each location, there is a name associated with the profile line. a. Terry’s Crk_Tributary is the profile line in Terry’s Creek BEFORE it goes into the Tangipahoa. b. Terry’s Crk_Tangipahoa_CS is the profile line in the Tangipahoa River just AFTER Terry’s Creek merges with the Tangipahoa River. 3. The Robert USGS Profile Line is in the Tangipahoa River north of I-12 near Robert, LA. Now open the Excel File “Tabulated Flow”. 1. The first tab (FLOW-Robert_USGS) contains the flow data (w/ time (in column B)) for all scenarios at Robert. 2. Each of you will need the BLE_Base_Model (for this example, the 10 year) and the All Reservoir (for this example, the 10 year) flow data. 3. Following the Terry’s Creek example, you will then also need the “Terry’s Crk Reservoir_10yr flow data. 4. Plot the three sets of flow data (BLE_Base_Model, All Reservoir, and Terry’s Crk Reservoir_10yr) with time. In addition to providing that graph, calculate and show the % reduction in the peak flow value for the All Reservoir and Terry’s Crk Reservoir_10 yr scenarios and comment on how much reduction there is in the peak flow and what, if any, delay there is in the peak flow timing. 5. The 4 th tab (FLOW-Terry’s Crk_Tributary) contains the flow data for the Terry’s Crk_Tributary profile line. Again, plot, calculate and comment on the differences between the BLE_Base_Model, All Reservoir, and Terry’s Crk Reservoir_10yr flows. 6. The 5 th tab (FLOW-Terry’s Crk_Tangipahoa CS) contains the flow data for the profile line in the Tangipahoa River, just downstream of where Terry’s Creek merges with the Tangipahoa River. Again, plot, calculate and comment on the differences between the BLE_Base_Model, All Reservoir, and Terry’s Crk Reservoir_10yr flows. Now open the Excel File “Tabulated WSE”. 1. The first tab (WSE-Robert_USGS) contains the maximum water surface data for different stations along the profile line for all scenarios. a. NOTE: Each tab has the station # that you will use for that profile in the upper left hand corner (highlighted in yellow).

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