Swmp

      Table 3-2: Urban land use (Split Source Nodes) - Pollutant Export Parameters

         Land Use           Parameter          Total Suspended              Total                  Total Nitrogen
                                                     Solids             Phosphorous                 (Log10 mg/L)
                                                 (Log10 mg/L)           (Log10 mg/L)
                                                 Storm       Base      Storm        Base         Storm      Base
                                                  Flow       Flow       Flow        Flow          Flow      Flow
          Ground              Mean                2.18        1.0      -0.47        -0.97         0.26      0.20
                          Std Deviation          0.39        0.34       0.31        0.31           0.23      0.20
           Road               Mean               2.43        1.0       -0.30        -0.97          0.26      0.20
                          Std Deviation          0.39        0.34       0.31        0.31           0.23      0.20
            Roof              Mean               1.30        N/A       -0.89        N/A            0.26      N/A
                          Std Deviation          0.39        N/A        0.31        N/A            0.23      N/A


      Table 3-3: MUSIC Runoff Generation Parameters

                            Parameter                                       Urban

                     Rainfall Threshold (mm)                                  1
                       Soil Capacity (mm)                                    500
                        Initial Storage (%)                                  10
                          Field Capacity                                     200
               Infiltration Capacity Coefficient a                           211
               Infiltration Capacity Coefficient b                            5
                        Initial Depth (mm)                                   50
                       Daily Recharge (%)                                    28
                        Daily Drainage (%)                                   27
                   Daily Deep Seepage Rate (%)                                0

      3.2.3. Catchment Areas

      The development site has been split into three catchments containing split source nodes
      (road, roof and ground) representing total developed area reporting to the bioretention
      basin. Table 3-4 outlines the catchment areas and imperviousness represented within the
      MUSIC model. The stormwater quality catchments are provided in Figure 3-1.
      Table 3-4: Catchment Areas

       Catchment                      Total Area         Road (ha)    Roof (ha)        Ground
                                         (ha)                                           (ha) /
       Catchment 1                       1.384             0.342            0.250          0.791
       Imperviousness (%)                                   60              100             15




21-0166SMP01-V1 | Stormwater Management Plan | 25 Pavilion Street, Pomona                                           | 11