Attachment 8 - Interim Stormwater Management Plan - TOPO · 132005.638.06

R3341: NOOSA LANDFILL: RRA CONCEPT HES BASIN AND DRAINAGE DESIGN REPORT



1 YEAR ARI 24 HOUR TYPE A SEDIMENT BASIN


                                                                                                                                                                                          APPROX. DIMENSIONS



                                                                                                                                           NUMBER                                                                     APPROX.
                                                                                                                                                                      APPROX.
                           SETTLING                                                                                    DECANT    DECANT       OF                                 APPROX.       APPROX.                 TOTAL
              CATCH                    DESIGN                   MINIMUM   MINIMUM            ACTUAL                                                   EMPTY    FULL    LENGTH                              SETTLING
  BASIN                     DEPTH                IX yr, 24 hr                       GOVERN            DFW    MANUAL    NUMBER     HOLE     DECANTS                               WIDTH AT      DEPTH AT               VOLUME
               AREA                    EVENT                       Vs        As                VS                                                     SCOUR   SCOUR       AT                               VOLUME
  ID                           DS               (mm/hr)                             FACTOR            (m)    DFW (m)     OF     DIAMETER   REQUIRED                              SPILLWAY      SPILLWAY                   AT
               (HA)                     (ARI)                     (m3)      (m2)              (m3)                                                    CHECK   CHECK   SPILLWAY                               (m3)
                              (m)                                                                                       HOLES     (mm)      FOR QA                                  (m)           (m)                 SPILLWAY
                                                                                                                                                                         (m)
                                                                                                                                           SELECTED                                                                      (m3)


  SW2          7.83           1.00       1         5.68          2891       846     VOLUME    2891    0.20    0.40      200        16        6.1       OK      OK       99.1       33.0           1.6          2891     4613




Environment. Engineering. Education.                                                                                                                                                                                  PAGE 5