Faculty of Engineering, Environment and Computing 7028EXQ Catchment Hydrology, Hydraulics & Flood Modelling

Assignment Brief

The report must include:

1. Introduction

- Introduction/overview of flood modelling

- Discussion of 1D vs 2D methods

- Summary of modelling that was done for your project.

2. Modelling methodology

Detailed explanation of how your model was set-up and ran and justification for the choice of model.

3. Results

- River levels before the bridge was added.

- River levels after the bridge was added.

- Mitigation strategies (recommended to model a range of measures to aid in discussion)

- River levels after mitigation strategies

4. Discussion

Critical discussion of the pros and cons of your modelling, the accuracy of your model and the significance of your results. This should also cover the feasibility, especially in terms of cost, of the mitigation strategies you modelled.

5. Conclusions and recommendations

Summarise your findings and provide final recommendation to the client.

The focus of this report is summarising the flood risk and mitigation strategies and recommendations in a concise manner. The key is to convey the main outcomes of your modelling in as few words as possible.

Task 2

You have been commissioned by the Belgrade Theatre to undertake an analysis of the impact on runoff and flooding of integrating SuDS at their workshop site in the Edgwick area of Coventry. Using the StormWater Management Model (SWMM), you are to design a suitable sustainable drainage (SuDS) plan for the site. You must use:

• Permeable pavement
• Green roofs
• Infiltration trench
• Bio-retention cell
• Rainwater Harvesting

However, the quantity of each SuDS device used is for you to decide, but you need to develop a sensible SuDS design that is capable of reducing the flood peak to below 15 l/s for conduit “Outflow2” and stops all onsite flooding for the simulate 1% AEP storm scenario. It is suggested that you use Google Earth to calculate the area of different parts of the site e.g. roof size and car park.

The Belgrade Theatre are also interested in using a 40,000 litre rainwater harvesting system (surface area is 10.4m², when adding this to SWMM) for their production; using the design in Table 1, you need to calculate the likely amount of water that can be stored an re-used in a year. The Belgrade Theatre use 250 litres of water per day.

It should include:

• A critical review of past research that has used SWMM as a method to model different SuDS techniques.
• An assessment of the suitability of the modelled SuDS, and how realistic the design is. o Input Table 2 (below) into your report, which will provide an overview of the SuDS you have used and how much (in terms of area in m²) of land they account for. Note this does not form part of the wordcount
  • Present hydrographs of the before and after SuDS installation, outlining how effective your proposed system is.
  • Use the table provided in Table 1 to show the possible storage capacity of rainwater on site. The average daily use is 250 litres.
  • Using existing literature and industry guidance (for example CIRIA C753, found at https://www.ciria.org/Memberships/The_SuDs_Manual_C753_Chapters.aspx), outline how each SuDS technique (permeable pavement/green roof/ infiltration trench/ bioretention cell/rainwater harvesting) aims to reduce runoff.
  • Critically assess the effectiveness of each SuDS technique to manage runoff at the

Belgrade Theatre Workshop. Your critique should refer back to the outline of how each SuDS technique reduces runoff, runoff, what previous research has found, and what the positives and negatives with each modelled SuDS approach are.

• A summary, based on your review, of how realistic your design is, and what the challenges would be if it were to be implemented.
• Conclusion

Table 1

Table 2

The marking break-down for the report are as following:

Notes:

1. You are expected to use the Coventry University APA style for referencing. For support and advice on this students can contact Centre for Academic Writing (CAW).
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