CIVL4017: Surface Water Hydrology Project Brief 2025 | Sydney

CIVL4017 Project Brief

The  progress  reports  and  final  reports  are  group  online  submissions  made  via Turnitin.  Only one report is required per group.  However, if multiple submissions are made,  only  one  report  from  the  group,  selected  at  random,  will  be  marked. Along with the group final project report  submission, individual  self- reflection  report must also  be  submitted  online. The  self-reflection  report  needs  to  clearly  identify contributions  made  by  the  student  to  the  project  and  the  lessons  learnt. W h i l e  these pages will not count towards the word limit, the reflection report will need to be concise.

Each submission will need to include all associated computations (spreadsheets and all software related files, as necessary).

Refer the Subject Outline for detailed marking criteria and standards.

Make justifiable and meaningful engineering assumptions, where necessary.

Use the average of the last digits of your team members’ student ID to determine the catchment to be used for the project.

If the average is between 0 & 3 (  , use catchment A If the average is between 3 & 6 (  , use catchment B If the average is between 6 & 9 (  , use catchment C

For example,

• if the  IDs  of  your  team  members  are  12345678,  23456789  & 34567890,  the average  of  the  last  three  digits  is  (8+9+0)/3=5.67.  Use  catchment  B  for  your team project.
• If  the  IDs  of  your  team  members  are  34567891,  56738491,  33567885  & 123454321,  the  average  of  the  last  four  digits  is (1+1+5+1)/4=2.  Use catchment A for your team project.

Estimates of all areas of the catchment can be made using either a software of your choice or any other standard engineering method you are familiar with, including the grid  approach.    An  approximate  estimate  suffices  -  use  the  scale  shown  in  the figure for estimation.

Catchments A, B & C are shown in Figures on the next three pages.

Fig.  1.  Catchment  A:  3  sub-catchments;  1  &  Outlet  are  outlets  of  the  three  sub- catchments,  Centroid  of  the  catchment  is  at:  150o34’52”  E  Longitude,  33o31’34”  S Latitude

Fig.  2.  Catchment  B:  3  sub-catchments;  1  &  Outlet  are  outlets  of  the  three  sub- catchments,  Centroid  of  the  catchment  is  at:  150o36’16”  E  Longitude,  33o31’25”  S Latitude 

Fig. 3.  Catchment  C:  3  sub-catchments;  1,  2 &  Outlet are  outlets  of  the  three sub- catchments,  Centroid  of  the  catchment  is  at:  150o31’17”  E  Longitude,  33o31’25”  S Latitude

Background

The  project  has  been  formulated  to  allow  you  to  determine  the  differences  in catchment  responses  before  and  after  development.    The  catchment  currently  is undeveloped and one of the three sub-catchments is proposed for development.    It is  up  to  your  team  to  decide  which  sub-catchment  you  want  developed.    You  will need to identify the sub-catchment for development in your report.

While  it  will  be  helpful  to  follow  the  step-by-step  (each  task  identified)  process  to solve  the  problem,  it  is  not  mandatory  to  follow  these  steps.    The  final  submission (project report) will need to be in a technical report format.

Estimation of physical parameters

Estimate the area of each sub-catchment.  (Use of Nearmap will be helpful) Estimate the total catchment area (don’t be pedantic, an approximation suffices). Estimate  the  length  of  channels.    This  will  be  different  for  different  catchments.

For  catchment  A  and  B,  you  will  need  to  estimate  lengths  of  one  channel  (1  to outlet)  whereas  for  catchment  C,  the  lengths  of  two  channels  (1  to  2,  and  2  to outlet) are required. 

Construction of rainfall hyetographs

Use the Bureau of Meteorology web site to generate the family of IFD curves for your  catchment.

Use  the  2016  IFD  and  the  latitude  and  longitude  stated  in  the figures  (for  your  catchment)  to  generate  IFD  information  for  your  site.    Use  1% AEP 6-hr storm for further analysis.    You will need to include both the IFD table and IFD curves in your report – your team can decide whether to include these in the body of the report or as appendices.

Use the ARR Data Hub web site to generate total rainfall hyetograph for the storm generated in the above step.  You will need to include the total rainfall hyetograph, both table and histogram, in your report.  

Extract  the  initial  and  constant  loss  values  from  the  ARR  Data  Hub  web  site.   Make necessary adjustments and construct the rainfall excess hyetograph.    You will need to explain how you achieved your result and include this in your report.   Graphical representation suffices here.  

Assume  one  of  the  sub-catchments  will  be  developed.    For  post-development condition,  assume  that  both  the  initial  loss  and  continuing  loss  are  reduced  by 50%  for  the  sub-catchment  you’re  proposing  to  develop.

Remember  you’re developing only one of the three sub-catchments therefore loss values and rainfall excess will change only for one sub-catchment. 

Construction of unit hydrographs of desired durations You will be generating 15-minute unit hydrographs for your sub-catchments using the 15-minute unit hydrograph for a 8.94 km2 catchment given in the table below and making reasonable assumptions (explained below).

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