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ENEN90038 Engineering Hydrology
1 Introduction
This assignment involves two major parts:
A)
Flood Estimation (60 Marks)
The estimation of flood response in various catchments across Victoria, where you will:
configure a RORB model to a selected catchment
derive design flood estimates using regional and design information
compare results with annual flood frequency quantiles
B)
Rainfall-Runoff Modelling (30 Marks)
The calibration of a daily rainfall-runoff model in various catchments across Australia, where you will:
adapt Python scripts for the Wapaba model to write code for calibrating GR4J model
adapt Python scripts for the Wapaba model to plot model simulation results
add new lines of code for calculating Nash-Sutcliff coefficient of model simulations in the
calibration period
Your report for both parts should be submitted via LMS, and the standard of report presentation will be
part of the assessment (10 marks). Note that your main report for this assignment will need to be
submitted as a SINGLE file, where any diagnostic information and plots are embedded (as required) in the
document to support your reasoning. A python script for Part B should be submitted separately as one .py
file.
Submission:
The assignment is an individual submission, and it is due by 5pm on Friday 20 May 2022. Please use the link
in canvas to submit your assignment report and your Python code file. Submit an electronic copy to the
Turnitin submission link on LMS, name it with your name (i.e., ENEN90038_Assign3_Surname_Firstname.pdf).
Late Penalty: assignments submitted late will be penalised 10% per day or part thereof; assignments
submitted more than 5 days late will not be marked.
2 Flood Estimation (60 marks)
2.1 Catchment Selection
We have supplied catchment maps and flood frequency analyses for a range of Victorian catchments with
good quality gauging data. While normally we would obtain concurrent rainfall and streamflow data to
calibrate the routing parameters (and help inform the loss parameters), in this case we will lighten our
workload and use regional information to come up with a preliminary estimate of model parameters.
(Actually, this represents a common situation in practice as most catchments of interest are ungauged.) Each student will work on their own catchment. To determine which catchment you will be working on,
convert your student number (#) into hexadecimal (using the DEC2HEX(#) function in Excel), and select the
catchment on the basis of the last digit of your student number. For example, if you student number is
914819, then the hexadecimal equivalent is DF583, and you would thus choose the Lerderderg@Sardine
catchment.
Hex I.D.
Assigned Catchment
Hex I.D.
Assigned Catchment
Tutorial
Mitta@Hinnomunjie (401203)
8
Macalister@Stringy (225221)
0
Wando@Wando Vale (238223)
9
Tullaroop@Clunes (407222)
1
Moyne@Toolong (237200)
A
Campaspe@Redesdale (406213)
2
Aire@Wyelangta (235219)
B
MajorCk@Graytown (405248)
3
Lerderderg@Sardine (231213)
C
Acheron@Taggerty (405209)
4
RiddelsCk@Riddels (230204)
D
FordCk@Mansfield (405245)
5
ToomucCk@PrincesHwy (228217)
E
Holland@Kelfeera (404207)
6
MoeR@Darnum (226209)
F
Buffalo@Abbeyard (403222)
7
Aberfeldy@Beardmore (225213)
2.2 Sub-Area Delineation (10 marks)
The first step is to delineate the sub-areas used to configure the RORB model. Obtain the map of the
catchment corresponding to your site (see files on LMS) then paste the image into PowerPoint and mark
out the sub-area boundaries manually. Give some consideration to the following guidelines for catchment
sub-division:
Divide catchment into several sub-catchments (generally between 5 and 20)
o Sub-catchment boundaries should be along watershed divides
o Sub-catchment area should be reasonably similar in size
Indicative sub-area ranges (though this varies widely!):
o 4 sub-areas for 10 km2
o 7 sub-areas for 100 km2
o 15 sub-areas for 1000 km2
You can estimate the area of each sub-area by simply counting the number of grid-squares (or even
estimating the area of the sub-catchment as a proportion of the total area by eye), and adjusting the sub
areas as required to ensure that the total area is the same as the published figure. Save an image (in
windows metafile format, *.wmf) of your catchment sub-division for inclusion as a figure in your report.
