ENCIV7090: Surface Water Hydrology-Runoff Hydrograph- Report Writing Assignment

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Internal Code: TV396
Report Writing Assignment:
Task:
Problem 1 (8 marks)
A hypothetical map for a rural catchment near Ballarat, Victoria is shown in Figure 1. Your task is to estimate the runoff hydrograph at the outlet of the catchment for a 10 year ARI using the software RORB. Refer to https://www.monash.edu/engineering/departments/civil/research/themes/water/rorb to obtain your free copy of this software.
surfacewater
Note:
1. Make appropriate assumptions (and list these) regarding the impervious fraction of each sub- catchment area along with the initial losses and continuing losses;
2. Use approximate reach lengths between nodes (and list these) noting that sub-catchment nodes are at the centroid;
3. Use Ballarat IFD data (to be obtained from www.bom.gov.au) to estimate the runoff ;
4. Obtain the runoff hydrograph from the entire catchment;
5. Check for time of concentration, tc, value and if it is unrealistic, adjust the K value in the model noting that the K value can be as high as 50 or 60.
6. Provide a graph of the hydrograph you obtain along with a tabular summary of your outputs.
Refer to the RORB user’s manual for additional information.
Problem 2 (8 marks)
Download a copy of HEC-RAS software (available at http://www.hec.usace.army.mil/software/hec-ras/) and its user manual (version 5.0). Complete the example application described in Chapter 4 of the HEC RAS User’s Manual Version 5.0 (February 2016). Submit all of the appropriate project files and results of your work for assessment.
Problem 3 (4 marks)
Summarise your work for questions 1 and 2 in a brief report. This report should include an introduction, documentation of any assumptions made, and neatly present the important results. You must also provide a brief conclusions to your work. The report should be about 5 pages including examples of your results, all discussion, a conclusion and any references you may have made.

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