Glen - REC13/0146 Flood Study BSM 30 April 2014. Email 2 Attachment 2

List Of Contents

1.    Summary                                                               3

2.    Introduction                                                          4

3.    Stormwater Detention Requirement                                      5

4.    Stormwater Discharges To No 2 Pearsons Road                           6

5. Runoff Rates To Floodway Model                                            8
5.1 Catchment Areas And Subdivision                                          8
5.2 Design Rainfall Data                                                     8
5.3 Model Calibration                                                       10
5.4 Linkage From Catchment Model To Floodway Model                          11

6.    Floodway Profiles, Pre-Development                                    13

7. Floodway Profiles, Post-Development                                      17
7.1 Mitigation Concept For Increased Stormwater Runoff                      17
7.2 Model Simulation                                                        17
7.3 Sensitivity Test                                                        18

8.    Certification                                                         19


List Of Figures (following text)

1     Locality And Lot Plan
2     Urbs Models Of Stormwater Detention Requirement
3     Proposed Change In Discharge Scenarios To No 2 Pearsons Road
4     Catchment Subdivision For Pre-Development Urbs Model
5     Catchment Subdivision For Post-Development Urbs Model
6     XPStorm Hydraulic Model Network
7     Photographs Of Eastern Floodway On 25 November 2013
8     Photographs Of Western Floodway On 25 November 2013
9     Proposed Floodway Modifications
10    Longitudinal Floodway Profiles
11    Floodway Cross-Section Changes – West Tributary
12    Footbridge And Bio-Basin Schematics
13    Flood Levels And Flood Boundaries


Appendices

A.     Design Rainfall Data
B.     Rational Method Calculations Of Floodway Inflows, Pre-Development
C.     Rational Method Calculations Of Floodway Inflows, Post-Development
D.     Floodway Storage Volumes




     Brisbane Stormwater Management Pty Ltd Document File: ValkevSDF.Doc    Page 2