CIVL4017-Surface Water Hydrology Report Writing - Engineering Assignment Help

Task

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. Please note that the project has been formulated step-by-step (each task identified), the final report will need to be in a technical report format. 

Task 1. Estimation of physical parameters Estimate the area of each sub-catchment.

Compute the total catchment area. Estimate the length of channels. This will be different for different catchments. For catchment A, you will need to estimate lengths of two channels (1 to 2 and 2 to outlet) whereas for catchments B & C, you only require one channel length (1 to outlet).

Task 2. 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?P 24-hr storm for further analysis. You will need to include both the IFD table and IFD curves in your report.

Use the ARR Data Hub web site (https://data.arr-software.org/) 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.

For post-development condition, assume that both the initial loss and continuing loss will be 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. 

Task 3. Construction of unit hydrographs of desired duration.

You will be generating 15-minute unit hydrographs for your sub-catchments using the 15-minute unit hydrograph for a 6.15km2 catchment given in the table below and making reasonable assumptions (explained below).

You may then be required to convert thus generated 15-min unit hydrograph to another duration unit hydrograph to meet the time interval of the rainfall excess hyetograph. You may need to follow S-hydrograph method to achieve this outcome.

Use of spreadsheet will save considerable time, as the process involves repetitive ncomputations. You will need to include your spreadsheet.