attached the file.
CIVE 5085 Green Infrastructure – Assessment 2 Due: 9 pm, Wednesday 22 April 2020 Introductory MUSIC Tutorial/Assignment Page 1 of 6 Assessment Exercise – A single home allotment in Sydney, NSW This exercise is a ‘guided walk through’–you take through a step-by-step process in the use of MUSIC to develop a simple allotment model to demonstrate the performance of a rainwater tank to reduce allotment runoff. The intention of the exercise is to guide you through several features of the MUSIC model that will be required to adequately use MUSIC in other applications. Usually this is followed by a larger assignment, but in this iteration of the course, we cannot use MUSIC for extended periods so this walk-through exercise is your assessment. Note, we have to use the trial version of MUSIC – so you cannot save your work. As such, this exercise is structured to make sure you get all your input data sorted BEFORE you start using the model. You will be required to download and use the trial version of MUSIC – you cannot save, so please ensure that you follow the prompts carefully and get all the data you need to for your assessment before starting to use the tool. To download MUSIC, proceed to the following web page and register as a user using your UniSA or any other email account: https://ewater.org.au/products/music/access-licensing/ Steps in the following exercise include selection of rainfall and potential evapotranspiration data, setup of a catchment using ‘source’ nodes, setup of treatment systems using treatment nodes, and assessment of the outcomes. You are directed to MUSIC guidelines for information – this is because you are expected to use this as the basis for any MUSIC modelling, not just use the default information. This exercise can be frustrating – you will have to refer to the guidelines a lot. This is deliberate – there is a misconception that MUSIC is a ‘simple’ tool – and it can be, but to use it correctly you will need to consult input guidelines and reference material. If you ignore guidelines, you probably aren’t using the tool effectively. YOUR ROLE You are a design engineer, and you have been asked to build a residential property on undeveloped agricultural land. You need to determine what the nature of runoff is prior to and following development and consider the impact of applying WSUD measures at the lot scale. You may make the following assumptions: - You are running a simulation of the pre-development and post-development conditions of a proposed single home. The home is being developed on land that is currently cleared and may be assumed to be agricultural in character. Assume an effective root zone of 0.5 m. - The house drains directly to the street, and the paved area drains to the pervious area. - The allotment is located in Sydney, NSW - Modelling should be conducted in accordance with the NSW DRAFT MUSIC1 modelling guidelines - The soil underlying the site is clayey sands - You are using a rainwater tank which is 4 kL in size, 2 m in diameter and round (circular). It has an additional depth of 0.3 m to store excess volume when full, and this volume allows overflow to exit the tank via a 90 mm pipe. Also assume that it may be connected to 100 m2 of roof area (any larger area will incur significant extra costs that inhibit uptake). The tank can empty completely. - The tank is connected to the laundry and toilet. - All runoff from the connected roof enters the tank. There is no bypass form the connected roof. - The tank is being planned for a home you expect to contain 3 people in this urbanising area - Water use will be evenly distributed throughout the year - You will also apply a rain garden to the catchment. The rain garden has the properties shown in Figure 2. 1 http://www.wsud.org/wp-content/uploads/2012/07/Draft-MUSIC-Modelling-Guidelines-31-08-201011.pdf https://ewater.org.au/products/music/access-licensing/ CIVE 5085 Green Infrastructure – Assessment 2 Due: 9 pm, Wednesday 22 April 2020 Introductory MUSIC Tutorial/Assignment Page 2 of 6 - The allotment in this example is adapted from that shown on page 2 of the WSUD Handbook – Student Edition (Argue, 2004)2. The allotment you are developing is shown in Figure 1. The verge and paved carriageway is 85% impervious in this example. Figure 1 - The residential allotment characteristics for this exercise Figure 2 – Proposed rain garden properties YOUR GOALS This assignment is based on conducting the following. A response to each component should be provided in the RESPONSE SHEET provided for this task on Learnonline. You will conduct and/or analyse the following: 1. Appropriate input and output for your MUSIC model 2. The pre-development runoff volume and pollutant load from the catchment 3. The post development runoff volume and pollutant load from the catchment (without treatment) 2 See tutor if you would like to view a copy of this in the original version. CIVE 5085 Green Infrastructure – Assessment 2 Due: 9 pm, Wednesday 22 April 2020 Introductory MUSIC Tutorial/Assignment Page 3 of 6 4. Apply a rainwater tank to the roof of the home and determine the impact of the rainwater tank on the runoff volume and water quality with respect to guideline values. 5. Apply a rain garden to the home to determine the impact of the rainwater tank and rain garden on the runoff volume and water quality with respect to guideline values. Step by step WALKTHROUGH The following steps guide you through this process. Subheadings break up this activity into the tasks on the response sheet. Assignment Part 1 – Summary of Input Data 1. Usually, I would say open the software and do it step by step, but to avoid any problems with the trial version of MUSIC, we will start by collecting ALL the data you need for this exercise and record everything on the response sheet as we go… 2. Find the data for the PRE-DEVELOPED catchment area and fill in Table 1 on your response sheet. Note that the pre-developed catchment area is that in Figure 1, above and on your response sheet. Note that you are simulating the total area, in an undeveloped state in Figure 1 (i.e. no building or paving). The pervious area parameters for this currently ‘agricultural’ catchment are provided in the NSW MUSIC modelling guidelines on page 3-19 to 3-24. The required pollutant parameters for TSS, TP and TN of stormflow and baseflow should be based on the NSW MUSIC modelling guidelines, pages 3-15, 3-25 to 3-27. 3. Record the required parameters for the PRE-DEVELOPMENT catchment in Table 1 on your response sheet. 4. Find the data for the DEVELOPED catchment area noting you will need to use several nodes to represent this area. Note that you will need to use several nodes for this case. To do this, refer to the typical example of a residential allotment model in the NSW MUSIC modelling guidelines on page 3-11 to 3-12. Note how the catchment is split into several catchments: a. Roof to tank b. Roof bypassing tank c. Driveway/paving and d. Landscaping This is pretty standard MUSIC modelling practice in most guidelines, and you should follow this convention in your developed model (and in your assignment). Note also that the DRAFT NSW MUSIC modelling guidelines pages 3-15, 3-25 to 3-27 provide recommended parameters for these land use categories. Note also – a roof catchment will not have baseflow, so you need to ensure the model does not start running with baseflow storage! See your tutor if you are unsure. 5. Record the required parameters for the DEVELOPED catchment in Table 2 on your response sheet. 6. Finally, determine the input data for the rainwater tank based on the assumptions above. To ensure that the rainwater in the tank is being used appropriately, refer to the manual and DRAFT NSW MUSIC modelling guidelines (page 3-31) for guidance. If you’re stuck, consult colleagues and/or your tutor(s). 7. Record the required parameters for the RAINWATER TANK in Table 3 on your response sheet. Assignment Part 2 – Predevelopment Runoff Conditions 8. Once you have all your data collected, you are ready to build your model. 9. Download, install and start the MUSIC software. 10. You will want to build a new model. So click on ‘New’. The first thing MUSIC requires is that you tell it what rainfall data to use. Review the available rainfall data on the left of the screen. These are the default MUSIC model climate templates which contain rainfall and PET data. As we are CIVE 5085 Green Infrastructure – Assessment 2 Due: 9 pm, Wednesday 22 April 2020 Introductory MUSIC Tutorial/Assignment Page 4 of 6 restricted to the trial version, select ‘Sydney 1959 6 Hourly.mlb’ – usually you would have more options, but we are restricted to using these at present. 11. Once you select your file, MUSIC will ask if you want to open a background image. This isn’t necessary in this case but feel free to cut and paste an image if you like – you can load any .jpg or .bmp image. This is good if you need to present your model in, say, a design report. 12. Select a source node and input the appropriate parameters you entered into Table 1 for the pre-developed catchment. Ask for help from your peers or tutor if you are unsure. You have completed the source node! Now to produce a receiving node… 13. Insert a receiving node into the model. I suggest using a ‘Pre-development’ receiving node to maximise your ability to compare data later on. But this is not essential. 14. Now add a link between the source node and the Receiving node 15. You’re ready to run. So click run. 16. Check out some results! Right click on your receiving node, and try producing a time series plot for flow, and also review the ‘mean annual loads’. Do you know what you are looking at with this? If not, ask. 17. Record the Mean Annual Loads data on your response sheet. Once you’re happy you have this running okay,