Study Area Description
Fig 3 shows the layout of a drainage system of a residential area. There are three subcatchments, four storm-water conduits, and four conduit junctions in it. Outlet nodes for subcatchments S-1, S-2 and S-3 are J-1, J-4 and J-5 respectively. After collection of stormwater from the system, water is finally drained to a stream at outfall O-1. The nearest and representative precipitation measuring gage for the system is RG-1.
| Subcatchment Properties | ||||
| Subcatchment ID | Area (acres) | Average Surface Slope (%) | Average Surface Imperviousness (%) | Outlet Node ID |
| S-1 | 4.18 | 1.43 | 47.25 | J-1 |
| S-2 | 4.03 | 3.13 | 46.10 | J-4 |
| S-3 | 3.31 | 2.20 | 38.30 | J-5 |
| System | 11.52 | 2.25 | 44.28 | O-1 |
| Conduit Properties | ||||||
| Conduit ID | Inlet Node ID | Outlet Node ID | Material | Cross-section Type | Diameter (ft) | Length (ft) |
| C-1 | J-1 | O-1 | PVC | Circular | 1.5 | 154.47 |
| C-2 | J-2 | J-1 | Concrete | Circular | 1.5 | 481.80 |
| C-3 | J-3 | J-2 | PVC | Circular | 1.5 | 190.78 |
| C-4 | J-4 | J-3 | PVC | Circular | 1.0 | 87.48 |
| C-5 | J-5 | J-3 | PVC | Circular | 1.0 | 86.27 |
| Total Length | 1000.80 | |||||
| Junction Properties | |
| Junction ID | Invert Elevation (ft) |
| J-1 | 480.48 |
| J-2 | 494.43 |
| J-3 | 501.83 |
| J-4 | 537.64 |
| J-5 | 526.29 |
| Outfall Properties | |
| Outfall ID | Invert Elevation (ft) |
| O-1 | 470.57 |