Committee of the Whole/Documents/Conceptual Servicing Brief - Stormwater Model Analysis (Attachment 8)
Appendix
Conceptual Servicing Brief - Stormwater Model Analysis (Attachment 8)
December 14, 2021Pages 252–2531 section
Hydrological analysis and stormwater models for the property at 171 Island Highway, comparing pre-development and post-development runoff and storage requirements for a 10-year storm.
Project Address: 171 Island HighwayPeak runoff (pre-development): 0.01255 m3/sStorage volume required: 25.1 m3Simulation period: June 07, 2021 to June 09, 2021
10 year storm:
Subcatchment S1
Objective functions for Runoff (m³/s)
From Jun 07, 2021 10:49 PM to Jun 09, 2021 1:11 AM (26.38 hours)
| Metric | S1 171 Island Highway Post-Development Model | S1 171 Island Highway Pre-Development Model |
|---|---|---|
| Maximum Runoff (m³/s) | 0.01827 | 0.01255 |
| Minimum Runoff (m³/s) | 0 | 0 |
| Mean Runoff (m³/s) | 0.00311 | 0.002418 |
| Duration of Exceedances (h) | 23.98 | 23.98 |
| Duration of Deficits (h) | 0.03333 | 4.217 |
| Number of Exceedances | 1 | 1 |
| Number of Deficits | 1 | 1 |
| Volume of Exceedances (m³) | 268.4 | 208.7 |
| Volume of Deficits (m³) | 0 | 0 |
| Total Runoff (m³) | 268.5 | 208.8 |
- Runoff (m³/s) Exceedance: 0
- Runoff (m³/s) Deficit: 0
Storage Analysis
Storage required for S1 171 Island Highway Post-Development Model
From Jun 07, 2021 10:49 PM to Jun 09, 2021 1:11 AM (26.38 hours)
- Available storage before outflow: 0 m³
- Maximum design outflow: 0.01255 m³/s
Storage volume required to obtain a peak flow of 0.01255 m³/s at location S1 is 25.1 m³.
Page 252–253
Extracted from: 2021 12 14 Committee of the Whole Agenda - Agenda - Pdf