Part F: Progressive activity week 7 Q.F1 Pick the rural location of a project site in Victoria, and its catchment area-not bigger than 25 sqkm, and given the below information, determine the rainfall intensity for ARI 5, 50, 100 year storm event. Show all the details of the procedure. Each student must propose different length of streams and elevations. Use fig below as a sample only. Pt. E-nt 950 200 P: D-40, PC-92.0 300m 300m 000m PL.-02.0 500m HI-MAGO PLA-M 91.00 To be deemed satisfactory the solution must include: Q.F1.1.Choice of catchment location Q.F1.2. A sketch displaying length of stream and elevation Q.F1.3. Catchment's IFD obtained from the Buro of Metheorology for specified ARI Q.F1.4.Calculation of the time of concentration-this must include a detailed determination of the equivalent slope. Q.F1.5.Use must be made of the Bransby-Williams method for the determination of the equivalent slope. Q.F1.6.The graphical display of the estimation of intensities for ARI 5,50, 100 must be shown. The work must be neatly presented. Question F2: Test your understanding of the use of topographic maps to glean information required for the design of a culvert crossing. The site at which the culvert crossing is to be constructed is depicted on the map. Carry out at least 5 of the following tasks on the topographic map provided. You are also required to provide the name of a tool (software) currently used to automatically obtain catchment characteristics (e.g. catchment boundary, area, stream length, stream slope). a. Identify on the topographic plan - ridges, valleys, and watercourses b. define the catchment boundaries along the ridge lines by tracing the boundary from outlet to ridge line and crossing the contours at right angles c. Determine the catchment area by any of the following methods: use of a planimeter, scale and calculation, or counting squares d. Estimate the stream flow lengths e. Estimate the time of concentration Progressive assessment 422 Estimate the overland flow time using design charts Student product assessment task Content is subject to copyright, RMIT University FINAL APPROVED-STUDENT PRODUCT ASSESSMENT TASK TEMPLATE-June 2019 Version 2.0 18/11/2020 STUDENT g. Estimate the stream time using approximate velocities h. Make use of the tortuosity factor to estimate the stream length i. Estimate the average weighted stream slope j. Estimate stream velocity from design chart using weighted slope k. Estimate the time as distance/velocity plus overland flow time E L E S 28 6600- RIDGE Use a scale of 1:10000 or 1:24000 Check your solution at this link: https://www.youtube.com/watch?v=ajF0DsuuY4k Page 23 of 31 RMIT UNIVERSITY