Original source · versioned page text
Attachment C - Stormwater Management Plan - 30-32 Doonella Street_SMP-revA_full (00016826)
Attached to the e-mail MCU15/0053 Plans & Applicant's Response to Information Request.
— aquaintel Stormwater Management Plan 30-32 Doonella Street, Tewantin Serina Pty Ltd
See the original
The page text is free to read. Viewing or downloading an original file needs an account.
Log in to see the originalSearchable page text hides email addresses. Original files are unchanged and may show email addresses.
Full text of the other 27 pages
Page 2
Aqualntel Pty Ltd t: +7 5414 7185 m: 0400 436 391 e: [email protected] w: www.aquaintel.com.au ACN: 153 875 953 ABN: 83 572 946 845 Document Information Report Title Stormwater Management Plan ; 30-32 Doonella Street, Tewantin Version RevA Author(s) Brendon Bolt Approved by KMcK (RPEQ 09298) Signed Wk An Date 12 August 2015 Doc No 2014027-RPT-001 Distribution TOD Consulting
Page 3
!
Executive!Summary!
!
AquaIntel' Pty' Ltd' was' commissioned' by' TOD' Consulting' on' behalf' of' Serina' Pty' Ltd' to'
prepare' a' Stormwater' Water' Management' Plan' (SMP)' to' support' the' Material' Change' of'
Use'application'(MCU15/0053)'for'unit'development'at'30K32'Doonella'Street,'Tewantin.'''
'
The'site'is'currently'occupied'by'a'number'of'residential'units'with'a'few'trees'and'grassed'
area.''The'site'grades'from'the'north'to'south'and'currently'runoff'from'the'site'largely'sheet'
flows'to'the'frontage'of'site'along'Doonella'Street.'''
'
Environmental' best' management' practices' are' proposed' for' treatment' of' stormwater'
flowing'through'the'site.'Stormwater'will'be'treated'by'a'number'of'treatment'devices'prior'
to' discharge' to' the' receiving' environment.' The' stormwater' treatment' strategy' for' the' site'
will'include'collection'of'runoff'from'roofed'areas'in'a'15kL'rainwater'tank'for'irrigation'reK
use,' with' overflows' and' flows' from' other' areas' on' site' directed' to' a' bioretention' system'
located'at'the'outlet'to'the'site.'''
'
NonKworsening'of'peak'flows'from'the'site'has'been'demonstrated'through'the'incorporation'
of'a'detention'system'located'above'the'bioretention'system.'''
'
This'Stormwater'Management'Plan'demonstrates'that'effective'treatment'of'stormwater'at'
the'proposed'development'can'be'achieved'through'the'application'and'appropriate'design'
of' Water' Sensitive' Urban' Design' (WSUD)' principles' in' accordance' with' legislative'
requirements' and' best' practice' guidelines.' The' treatment' train' proposed' for' the'
development'site'achieves'the'performance'criteria'set'by'the'Noosa'Shire'Council.''Through'
the'implementation'of'detention'systems'within'the'catchments'nonKworsening'criteria'has'
been'achieved'to'ensure'no'downstream'impacts.'
! '
!
Page 4
aqua Contents EXECUTIVE SUMMARY I 1 INTRODUCTION 1 1.1 SITE CHARACTERISTICS 1 2 STORMWATER QUALITY 3 2.1 DESIGN OBJECTIVES 3 2.2 STORMWATER QUALITY TREATMENT 3 2.2.1 STRATEGY 3 2.3. MODELLING APPROACH 3 2.3.1 MUSIC PARAMETERS 3 2.3.2. CATCHMENT AREAS 4 2.3.3. MUSIC MobEL LAYOUT 5 2.4 TREATMENT MEASURES 6 2.4.1 RAINWATER TANKS 6 2.4.2 BIORETENTION SYSTEM 7 2.5 RESULTS 8 3 STORMWATER QUANTITY 9 3.1 EXISTING SCENARIO 9 3.2 RATIONAL METHOD CALIBRATION 10 3.3. DEVELOPED SCENARIO 11 3.4 MITIGATED SCENARIO 12 4 CONSTRUCTION PHASE STORMWATER MANAGEMENT 13 5 OPERATIONAL PHASE STORMWATER MANAGEMENT 14 6 CONCLUSIONS 15 7 REFERENCES 16 APPENDICIES Appendix 1: Site Layout 17 Appendix 2: Rational Method and WBNM Output 18 FIGURES Figure 1: Locality Plan 2 Figure 2: WSUD Catchment and Locality Plan 5 Figure 3: Model Layout 5
Page 5
TABLES Table 1: Table 2: Table 3: Table 4: Table 5: Table 6: Table 7: Table 8: Table 9: Table 10 Table 11 Table 12 Table 13 Table 14 Site stormwater quality objectives (operational phase) MUSIC Base and Storm Flow Concentration Parameters — Urban MUSIC Runoff Generation Parameters - Urban Catchment Areas MUSIC Rainwater Tank Parameters Bioretention Basin Design Parameters MUSIC Results — Load-Based Pollutant Outputs Existing Scenario WBNM Outlet Peak Flows Rational Method Calibration Summary (Total Catchment) : Rational Method Peak Flows Versus WBNM Peak Flows : WBNM Sub-Catchment Fraction Impervious Values — Developed Scenario : Developed Scenario WBNM Outlet Peak Flows : Storage and Outlet Details of Underground Detention System : Comparison of Existing, Developed and Mitigated WBNM Outlet Peak Flows aqua WOON OHH HRW PRPRPRPPR NNPRPRPOO
Page 6
!
1 Introduction!
AquaIntel!Pty!Ltd!was!commissioned!by!TOD!Consulting!on!behalf!of!Serina!Pty!Ltd!
to! prepare! a! Stormwater! Water! Management! Plan! (SMP)! to! support! the! Material!
Change! of! Use! application! (MCU15/0053)! for! unit! development! (16! units)! at! 30"32!
Doonella!Street,!Tewantin!(Lot!32!on!RP893427!and!Lot!903!on!T1631).!
The!development!will!be!required!to!comply!with!the!Division'20'–'Water'Sensitive'
Urban' Design' Code! and! Division' 18—Transport,' Roads' and' Drainage' Code! of! the!
Noosa! Shire! Council’s! (NSC)! “The' Noosa' Plan”.' ' From! this,! the! load! based! Water!
Quality! Objectives! (WQO’s)! stipulated! in! the! State! Planning! Policy! –! July! 2014!
(DSDIP)! for! the! South! East! Queensland! region! will! be! adopted! for! the! site.! ! The!
purpose! of! this! SMP! is! to! identify! the! final! stormwater! quality! options! to! be!
implemented!within!the!site!to!achieve!elements!of!the!code.!!The!objectives!of!this!
SMP!are!to:!!
• Ensure!the!proposed!development!maintains!or!improves!the!environmental!
values!of!the!receiving!waters!within!the!receiving!catchment!throughout!the!
operational!phase;!!
• Consider! suitable! Stormwater! Quality! Improvement! Devices! (SQID’s)! based!
on!Water!Sensitive!Urban!Design!(WSUD)!principles;!
• Recommend!an!appropriate!stormwater!treatment!strategy!for!the!proposed!
development! that! complies! with! Noosa! Shire! Council! (NSC)! water! quality!
objectives;!
• Ensure! the! development! achieves! non"worsening! of! stormwater! flows!
downstream!of!the!site.!
1.1 Site!Characteristics!
The!location!of!the!proposed!development!site!is!shown!in!Figure!1.!!!!
The!site!grades!from!the!north!to!south!with!site!elevations!ranging!from!4.5!to!8.5m!
AHD.!!There!is!a!drainage!system!in!Sidoni!Lane!which!picks!up!flows!upstream!of!the!
site!and!directs!them!around!the!site!to!Sidoni!Street.!!
Council’s! flood! overlay! mapping! shows! that! the! site! is! located! outside! of! the!
estimated!100!year!ARI!flood!extent!and!the!site!would!not!be!subject!to!the!Flood!
Management!Code.!
The!proposed!development!layout!is!provided!in!Appendix!1.!
!
!
!
!
!
!
!
!
! ! ! 1!
Page 7
aquaintel Goat Island Figure 1: Locality Plan Intelligent Water Management Solutions
Page 8
!
2 Stormwater!Quality!
2.1 Design!Objectives!
This! report! identifies! the! stormwater! quality! management! objectives! for! the!
operational! phase! (post"construction! phase)! of! the! proposed! development.!!
Construction! based! stormwater! quality! management! objectives! will! need! to! be!
addressed!as!part!of!Operational!Works!application.!
The! load! based! Water! Quality! Objectives! (WQO’s)! stipulated! in! the! State! Planning!
Policy!–!July!2014!for!the!South!East!Queensland!region!will!be!adopted!for!the!site.!!
The! applicable! water! quality! design! objectives! for! the! site! are! shown! in! Table! 1!
below.!!!
Table!1:!Site!stormwater!quality!objectives!(operational!phase)!
Minimum!reductions!in!mean!annual!loads!from!unmitigated!development!(%)!
Total!Suspended! Total!Phosphorous! Total!Nitrogen!! Gross!pollutants!!
Solids!(TSS)! (TP)! (TN)! >5!mm!
80! 60! 45! 90!
2.2 Stormwater!Quality!Treatment!
2.2.1 Strategy!
The! objective! of! this! report! is! to! assess! the! stormwater! quality! measures! required!
based! on! the! proposed! layout! and! is! prepared! in! order! to! support! the! Material!
Change!of!Use!(MCU)!application!for!the!site.!!The!treatment!train!for!the!proposed!
development!consists!of!runoff!from!the!roofed!area!being!collected!in!a!rainwater!
tank!for!re"use!on!site.!!Overflows!from!the!tank!and!all!other!collected!runoff!will!be!
directed! to! a! central! bioretention! system! (and! detention! tank)! located! near! the!
outlet! of! the! site! prior! to! discharging! from! the! site! to! the! drainage! system! in!
Doonella! Street.! ! A! small! catchment! associated! with! the! driveway! down! to! the!
basement!carpark!will!bypass!the!bioretention!area!due!to!the!level!difference.!!!!
2.3 Modelling!Approach!
2.3.1 MUSIC!Parameters!
An! assessment! of! stormwater! runoff! quality! from! the! proposed! development! site!
has! been! assessed! using! the! Model! for! Urban! Stormwater! Improvement!
Conceptualisation!(MUSIC)!–!Version!5.16,!released!in!2013.!!!
Climate!data!for!the!catchment!was!sourced!from!the!MUSIC!model!database.!!The!
rainfall! and! evaporation! data! template! for! this! site! has! been! based! on! data! from!
Cooroy!from!1/1/1973"!31/12/1983!with!six!(6)!minute!rainfall!duration.!
Table! 2! and! Table! 3! outline! the! adopted! source! node! parameters! from! “MUSIC'
Modeling'Guidelines”!(Water!By!Design,!2010)!that!were!used!in!the!MUSIC!model.!!!
!
!
! ! ! 3!
Page 9
a aquaintel Table 2: MUSIC Base and Storm Flow Concentration Parameters — Urban Total Suspended Total . 0 a Total Nitrogen Solids Phosphorous (Logis mg/L) Land Use Parameter (Logio mg/L) (Logi) mg/L) 70 Storm Base Storm Base Storm Base Flow Flow Flow Flow Flow Flow Mean 2.18 1.0 -0.47 -0.97 0.26 0.20 Ground Std Deviation 0.39 0.34 0.31 0.31 0.23 0.20 Mean 2.43 1.0 -0.30 -0.97 0.26 0.20 Road 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 00" Std Deviation 0.39 N/A 0.31 N/A 0.23 N/A Table 3: MUSIC Runoff Generation Parameters - Urban 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 2.3.2. Catchment Areas The development site has been represented as four catchments, for the purpose of representing the site development. Table 4 outlines the catchment areas and imperviousness represented within the MUSIC model. The stormwater quality catchments are provided in Figure 2. Table 4: Catchment Areas Catchment Area (m7) Impervious Roof 825 100 Ground 1,249 50 Road 386 100 Road-Bypass 70 100 TOTAL 2,527
Page 10
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
Figure!2:!WSUD!Catchment!and!Locality!Plan!
2.3.3 MUSIC!Model!Layout!
As! the! management! of! urban! stormwater! needs! to! take! a! holistic! approach,! a!
number! of! management! measures! need! to! be! implemented! in! series! to! form! a!
treatment!train.!The!correct!utilisation!of!various!devices!within!the!treatment!train!
is! imperative! to! target! the! desired! pollutants,! from! the! gross! solids! to! the! fine!
colloidal!partials.!!Figure!3!shows!the!MUSIC!model!layout!for!the!development.!
!
Figure!3:!Model!Layout!
! ! ! 5!
Page 11
!
2.4 Treatment!Measures!
Runoff!from!the!development!will!be!treated!via!roof!water!to!a!15kL!rainwater!tank!
with!site!flows!then!directed!to!a!bioretention!system.!!The!locality!of!the!treatment!
devices!are!detailed!in!Appendix!1.!
2.4.1 Rainwater!Tanks!
!
!
!
Through! appropriate! design! of! rainwater! tanks! it! has! been! found! that! significant!
reductions!in!run"off!can!be!achieved.!!Rainwater!tanks!not!only!provide!temporary!
detention!of!stormwater!run"off,!but!also!provide!a!significant!alternative!for!water!
supply!uses.!!Collected!roof!water!is!suitable!for!garden!irrigation!or!toilet!flushing!
with!no!additional!treatment.!!!
Sizing!of!the!tank!volume!has!been!modeled!in!MUSIC!using!estimated!demands!for!
each!use!to!achieve!a!minimum!70%!reliability.!!It!is!proposed!that!the!water!stored!
in! the! tank! be! used! for! irrigation! of! the! proposed! landscape! areas.! ! Applying! an!
irrigation! rate! of! 548mm/yr,! the! annual! irrigation! demand! scaled! by! daily! PET! was!
calculated! as! 342kL/yr.! ! Based! on! the! roof! catchment! areas! and! the! demands!
estimated! for! each! use,! the! rainwater! tank! modeling! parameters! are! detailed! in!
Table!5.!
!
Table!5:!MUSIC!Rainwater!Tank!Parameters!
Parameter! Value!
Total!Tank!Volume!
15!
(KL)!
Surface!Area!(m2)! 6!
Overflow!Pipe!(mm)! 90!
Annual!Demand!
Scaled!by!Daily!PET! 342!
(kL/yr)!
Daily!Demand!(kL/d)! 0!
PET!Demand!(kL/yr)! 0!
!
!
! ! ! 6!
Page 12
!
2.4.2 Bioretention!System!
!
Bioretention! systems! use! ponding! above! a! treatment! surface! to! maximise! the!
volume! of! runoff! flowing! through! the! filtration! media.! They! typically! convey! flows!
above! the! design! event! through! overflow! pits! or! a! weir.! ! The! treatment! system!
operates! by! firstly! filtering! surface! flows! through! surface! vegetation! and! then!
percolating! runoff! through! prescribed! filtration! media.! ! This! media! provides!
treatment! through! fine! filtration,! extended! detention! and! biological! uptake! of!
nutrients.!!!
As! these! systems! take! approximately! 12"24hrs! to! drain,! the! maximum! depth! of!
pondage! allowed! to! occur! over! the! filter! area! has! been! limited! to! 300mm,! with! a!
minimum! filter! media! depth! of! 500mm.! ! Table! 6! summarises! the! proposed! design!
parameters!for!each!bioretention!system!for!this!development.!!In!conjunction!with!
the! bioretention! system,! the! detention! basin! has! also! been! represented! as! it! is!
located!directly!above!the!bioretention.!!The!bioretention!locations!are!highlighted!
in!Figure!2.!!!
Table!6:!Bioretention!Basin!Design!Parameters!
Parameter! Basin!
Extended!Detention!Depth!(m)! 0.30!
2
Storage!Surface!Area!(m )! 33!
2
Filter!Media!Area!(m )! 29!
Unlined!Filter!Media!Perimeter!(m)! 0.01!
Saturated!Hydraulic!Conductivity!(mm/hr)! 200!
Filter!Depth!(m)! 0.5!
TN!Content!of!Filter!Media!(mg/kg)! 400!
Orthophosphate!Content!of!Filter!Media!(mg/kg)! 50!
Exfiltration!Rate!(mm/hr)! 0.0!
Overflow!Weir!(m)! 2.0!
!
!
!
!
!
!
!
! ! ! 7!
Page 13
!
2.5 Results!
MUSIC! modelling! of! the! proposed! treatment! train! for! the! residential! unit!
development! at! 30"32! Doonella! Street,! Tewantin,! was! performed! to! ensure! the!
identified!load!based!Water!Quality!Objectives!was!achieved.!!Table! 7!presents!the!
load"based!outputs!that!are!represented!by!this!MCU!application.!
!
Table!7:!MUSIC!Results!–!LoadaBased!Pollutant!Outputs!
Reduction!
Unmitigated! Mitigated! Target!
Pollutant! Achieved!!!!! Compliance!
(kg/yr)! (kg/yr)! Reduction!
(%)!
Flow! 3.14! 2.82! 10.5! "! a!
TSS! 559! 112! 80! 80%! !!
TP! 1.13! 0.443! 60.7! 60%! !!
TN! 6.54! 2.83! 56.8! 45%! !!
GP! 73.2! 2.37! 96.8! 90%! !!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
! ! ! 8!
Page 14
!
3 Stormwater!Quantity!
The!objective!of!this!component!of!the!study!is!to!investigate!the!potential!impact!
that!the!proposed!development!will!have!on!peak!flows!discharging!downstream!of!
the!site.!!Where!any!increases!of!peak!flows!are!found,!potential!mitigation!options!
will!be!investigated!in!the!form!of!a!detention!system.!!!
Hydrologic!modelling!of!the!catchment!has!been!carried!out!using!WBNM!software!
developed! jointly! by! the! University! of! Wollongong,! Rienco! Consulting! and! Balance!
R&D.! ! The! 2012! version! has! been! used! for! this! investigation.! ! A! peak! flow! rational!
method!calibration!has!also!been!carried!out.!
Modelling! has! been! carried! out! for! the! 1,! 2,! 5,! 10,! 20,! 50! and! 100! year! ARI! storm!
events.!!The!following!scenarios!have!been!investigated:!
1.! Existing!Scenario!
2.! Developed!Scenario!
3.! Mitigated!Scenario!
3.1 Existing!Scenario!
Sub"catchment! fraction! impervious! values! have! been! calculated! based! on! aerial!
imagery! data.! ! The! existing! scenario! sub"catchment! areas! and! fraction! impervious!
values!were!calculated!to!be!0.2527ha!and!20%.!!The!existing!catchment!is!confined!
to!the!site!boundary!itself.!
The!WBNM!model!has!been!calibrated!to!Rational!Method!derived!peak!flows!at!the!
catchment! outlet.! ! Details! of! the! Rational! Method! calibration! are! provided! in!
Section3.2.!
The! WBNM! catchment! lag! parameter! adopted! for! the! investigation! is! 1.8,! which! is!
within! the! accepted! range! of! values! provided! in! the! WBNM! technical! reference!
manual.!!Rainfall!loss!rates!adopted!for!this!investigation!are!an!initial!and!continuing!
loss!of!0mm!and!2.5mm!for!pervious,!and!0mm!and!0mm!for!impervious.!!
WBNM!modelling!has!been!carried!out!for!the!range!of!standard!design!ARI!events!
ranging!from!1!year!up!to!100!years.!!Peak!flows!tabulated!in!this!report!represent!
the!peak!values!extracted!from!this!range!of!storm!events.!!
Table!8:!!Existing!Scenario!WBNM!Outlet!Peak!Flows!
1yr!ARI! 2yr!ARI! 5yr!ARI! 10yr!ARI! 20yr!ARI! 50yr!ARI! 100yr!ARI!
Catchment! (m3/s)! (m3/s)!
(m3/s)! (m3/s)! (m3/s)! (m3/s)! (m3/s)!
Outlet! 0.08! 0.10! 0.12! 0.14! 0.16! 0.16! 0.18!
!
!
!
!
! ! ! 9!
Page 15
!
3.2 Rational!Method!Calibration!
The!existing!scenario!WBNM!model!has!been!calibrated!to!Rational!Method!derived!
peak!flows!at!the!outlet!of!the!catchment!draining!to!the!Doonella!Street!frontage.!!!
A! summary! of! the! Rational! Method! calculation! is! provided! below! in! Table! 9! and!
additional!details!of!the!Rational!Method!calculation!are!provided!in!Appendix!2!of!
this!report.!
Table!9:!Rational!Method!Calibration!Summary!(Total!Catchment)!
Parameter! Value!
Time!of!Concentration!(tc)!! !5!minutes!
Catchment!Area! 0.2527!hectares!
C10!Value! 0.7!
100!year!Rainfall!Intensity!(6!minute!duration)! 321!mm/hr!
!
A! comparison! of! peak! Rational! Method! flow! rates! compared! with! peak! WBNM!
model!flow!rates!are!provide!in!Table!10!below.!
Table!10:!Rational!Method!Peak!Flows!Versus!WBNM!Peak!Flows!!
1yr!ARI! 2yr!ARI! 5yr!ARI! 10yr!ARI! 20yr!ARI! 50yr!ARI! 100yr!ARI!
Catchment! (m3/s)!
(m3/s)! (m3/s)! (m3/s)! (m3/s)! (m3/s)! (m3/s)!
WBNM! 0.08! 0.10! 0.12! 0.14! 0.16! 0.16! 0.18!
Rational! 0.05! 0.07! 0.09! 0.11! 0.13! 0.16! 0.19!
%!Difference! 33.0! 29.3! 22.8! 18.8! 15.8! "1.7! "5.1!
!
The! above! results! show! that! a! reasonable! peak! flow! calibration! has! been! achieved!
from! the! WBNM! model! when! compared! to! a! Rational! Method! calculation.! ! The!
WBNM!model!produces!a!higher!peak!in!the!smaller!events,!however,!this!would!be!
considered!acceptable!in!assessing!non"worsening!of!flows.!
!
! !
!
!
!
!
!
!
!
!
!
!
!
!
!
!
! ! ! 10!
Page 16
aquaintel 3.3. Developed Scenario The proposed development has been incorporated into the WBNM model by adjusting the fractions impervious values, with the catchment area remaining unchanged. Fraction impervious values of the existing and proposed scenarios are provided in Table 11 below. Table 11: WBNM Sub-Catchment Fraction Impervious Values — Developed Scenario Area (ha) Developed Scenario Existing Scenario Impervious (%) Impervious (%) 0.2527 75 20 Peak flows tabulated in this report represent the peak values extracted from the modelled range of storm events. Table 12: Developed Scenario WBNM Outlet Peak Flows Existing Peak Flow Developed Peak Flow Change in Peak Flow (m?/s) (m/s) (m?/s) 1 year 0.08 0.08 0.006 2 year 0.10 0.10 0.007 5 year 0.12 0.13 0.006 10 year 0.14 0.14 0.007 20 year 0.16 0.16 0.006 50 year 0.16 0.18 0.014 100 year 0.18 0.19 0.014 It can be seen that the peak flows have increased to the catchment outlet. This is a result of the development site increasing the impervious area. Mitigation within the catchment will be required in the form of a detention tank. 11
Page 17
!
3.4 Mitigated!Scenario!
When!comparing!the!peak!flows!in!the!existing!and!developed!scenario,!increases!in!
the!peak!discharge!occur!at!the!catchment!outlet.!!As!a!result!a!detention!system!will!
be! required! to! be! implemented! in! order! to! demonstrate! non"worsening! from! the!
site.!!!
All! modeling! parameters! remain! consistent! between! the! developed! and! mitigated!
scenarios,! with! the! addition! of! a! detention! tank! at! the! site! outlet.! ! The! storage!
details!included!within!the!model!are!provided!in!Table!13.!
Table!13:!!Storage!and!Outlet!Details!of!Underground!Detention!System!
Storage!
Storage!Height!! Outlet!Configuration! Peak!100yr!WSL!!
Volume!!
20m3! 1.0m! 300mm!pipe! RL1.0m!
!
A! comparison! of! the! peak! flows! between! the! existing,! developed! and! mitigated!
scenarios! are! presented! below! in! Table! 14.! ! It! can! be! seen! that! non"worsening! of!
peak!flows!are!achieved!at!each!outlet!to!the!site.!!
Table!14:!!Comparison!of!Existing,!Developed!and!Mitigated!WBNM!Outlet!Peak!Flows!
Existing!Peak! Developed!Peak! Mitigated!Peak! Change!in!Peak!
! Flow!(m3/s)! Flow!(m3/s)! Flow!(m3/s)! Flow!(m3/s)!
1!year! 0.08! 0.08! 0.07! "0.003!
2!year! 0.10! 0.10! 0.09! "0.004!
5!year! 0.12! 0.13! 0.12! "0.007!
10!year! 0.14! 0.14! 0.13! "0.008!
20!year! 0.16! 0.16! 0.14! "0.011!
50!year! 0.16! 0.18! 0.16! "0.002!
100!year! 0.18! 0.19! 0.18! "0.004!
!
!
WBNM!outputs!are!provided!in!Appendix!2!of!this!report.!
!
!
!
!
!
!
!
!
!
!
!
!
! ! ! 12!
Page 18
!
4 Construction!Phase!Stormwater!Management!!
The! management! of! the! site! during! the! construction! phase! is! an! important! step! in!
ensuring! water! quality! standards! are! achieved.! ! Implementation! of! best! practice!
Erosion! and! Sediment! Control! techniques! is! imperative! to! managing! the! quality! of!
runoff!affected!by!construction!works.!!!
The! following! points! provide! general! guidance! on! the! management! of! stormwater!
during!the!construction!phase.!!In!the!absence!of!a!Noosa!Council!guideline!detailed!
Erosion! and! Sediment! Control! Management! Plans! should! be! developed! prior! to!
construction! works! commencing! in! accordance! with! Sunshine! Coast! Council’s!
Maroon!Manual!"!“Manual'for'Erosion'and'Sediment'Control”.!
1. Establish!a!single!stabilised!entry/exit!point!for!the!site!works;!!
2. Construct! a! shake"down! grid! at! the! entrance! to! facilitate! the! removal! of!
sediment!from!vehicles!leaving!the!site,!which!should!comprise!a!150"200mm!
deep!pad!of!40mm!crushed!rock;!!
3. Install!sediment!fences!along!the!lower!boundaries!of!the!site;!
4. Install!bins!and/or!wind"proof!litter!areas!on"site!to!minimise!the!dispersion!
of!gross!pollutants;!!
5. Maintain! on! site! spare! materials! necessary! for! the! emergency! repair! of! all!
erosion! control! devices.! This! includes! silt! fences! and! clean! crushed! rock! for!
reapplication!to!the!entrance;!!
6. Following! each! days! construction! works,! ensure! that! any! material! on! road!
surfaces!is!swept!from!the!road,!and!not!permitted!to!be!washed!down!the!
gutters!and!piped!drainage!systems.!
7. Final! establishment! of! bioretention! basin! should! not! occur! until! full!
stabilisation! of! upstream! site! has! occurred;! preferably! these! should! be!
temporarily!turfed!while!commercial!construction!is!occurring.!
It!shall!be!the!responsibility!of!the!developer,!through!their!principal!contractor,!to!
ensure!that!temporary!sediment!and!erosion!controls!are!installed!and!maintained!
correctly.!!
Experience!shows!that!the!critical!periods!in!the!life!of!WSUD!vegetated!stormwater!
systems!are!the!construction!and!establishment!phases.!!The!timing!and!approach!to!
these!systems!must!be!carefully!considered!to!ensure!successful!establishment!and!
long"term! performance.! ! Bioretention! systems! are! now! common! stormwater!
treatment! devices! for! new! urban! developments! in! South! East! Queensland.!!
Successful! construction! and! allowing! adequate! time! for! the! systems! to! establish! is!
critical!to!their!long"term!performance!and!function.!!Construction!of!the!system!is!
also! linked! to! having! suitable! bioretention! designs! in! place! to! ensure,! civil!
contractors!have!appropriate!plans!to!construct!to.!!Applying!due!care!in!the!design!
and! construction! phase! will! ensure! the! function! of! the! system! whilst! also! keeping!
on"going!maintenance!to!a!minimum.!It!is!highly!recommended!that!the!constructed!
activities! be! completed! in! accordance! with! the! Construction' and' Establishment'
Guidelines:'Swales,'Bioretention'Systems'and'Wetlands'(Apr'2010).!
! ! ! 13!
Page 19
a aquaintel 5 Operational Phase Stormwater Management The bioretention system will be owned by the developer (body corporate), who as the asset custodian, will be responsible for the on-going maintenance of the water quality device. Maintenance for the bioretention basin may involve the following: 1. 8. 2 3 4. 5 6 7 Scheduled inspections; Removal of noxious plants or weeds; Maintaining the desired vegetation; Repairing erosion; Unblocking inlets and outlets; Removing litter and debris; Managing algal or moss growth; Maintaining the permeability of the filtration. Operations and maintenance should be conducted in accordance with the Maintaining Vegetated Stormwater Assets (Feb 2012) guideline. 14
Page 20
!
6 Conclusions!
It! can! be! seen! from! the! results,! presented! in! Table! 7! that! the! treatment! train!
proposed!for!the!development!site!achieves!the!performance!criteria!set!by!the!NSC.!!
Annual! Load! Reductions! of! Total! Suspended! Solids! (TSS),! Total! Phosphorus,! Total!
Nitrogen! (TN)! and! Gross! Pollutants! (GP)! between! the! Mitigated! and! Unmitigated!
Scenarios!have!been!achieved.!!
It!is!proposed!for!the!site!to!implement!a!detention!system!within!the!site!in!order!to!
achieve! Council’s! non"worsening! criteria.! ! Table! 14! provides! a! comparison! of! the!
peak!existing,!developed!and!mitigated!flows.!!It!can!be!seen!that!whilst!peaks!flows!
increase! under! the! developed! scenario,! the! modeled! mitigation! solutions! ensure!
non"worsening!is!achieved.!!
This! plan! demonstrates! that! effective! treatment! of! stormwater! at! the! proposed!
development! can! be! achieved! through! the! integration! of! Water! Sensitive! Urban!
Design! (WSUD)! principles.! ! Through! the! incorporation! of! a! rainwater! tank,!
bioretention!and!detention!system,!the!plan!successfully!demonstrates:!
• Compliance!with!the!requirements!of!NSC’s!Load!Based!Objectives;!
• Ecological!sustainability!in!terms!of!the!development’s!impact!upon!receiving!
waters!and!the!viability!of!the!proposed!site!development;!!
• Compliance!with!NSC!non"worsening!of!peak!flows!in!the!1,!2,!5,!10,!20,!50!and!
100!year!ARI!storm!event;!and!
!
!
! !
! ! ! 15!
Page 21
~~ aquaintel References WaterbyDesign (2012), “Maintaining Vegetated Assets”. WaterbyDesign (2012), “Bioretention Technical Design Guidelines”. WaterbyDesign (2010), “MUSIC Modelling Guidelines”. Noosa Shire Council (2013), “The Noosa Plan”. Healthy Waterways (June 2006), “Water Sensitive Urban Design Technical Design Guidelines for South East Queensland”. Queensland Government -— Natural Resources and Water (2007), “Queensland Urban Drainage Manual - Volume 1 2"4 Edition’. Queensland Government (2014), “State Planning Policy —July 2014”. 16
Page 22
7 aquaintel Appendix 1: Site Layout 17 ntelligent Water Management Solutions
Page 23
28/05/ 2015 6:51: 18 PM
THIS DRAWING IS NOT TO BE USED FOR CONSTRUCTION
30-32 DOONELLA APARTMENTS
30-32 DOONELLA ST, TEWANTIN
LOT 32 RP 893427 & LOT 903 T 1631 DEVELOPMENT SUMMARY
GROSS FLOOR AREA AREA
GROUND FLOOR
6x 2 BEDROOM UNIT TYPE A 468 m²
(78m² EACH)
1x 2 BEDROOM UNIT TYPE B 72 m²
1x 1 BEDROOM UNIT 64 m²
CIRCULATION 107 m²
GROUND FLOOR STAIRWELL 10m²
1 LEVEL 01
A-04-01
6x 2 BEDROOM UNIT TYPE A 468 m²
(78m² EACH)
4000 23180 13175
SIDE SB OVERALL BUILDING WIDTH SIDE SB 1x 2 BEDROOM UNIT TYPE B 72 m²
7000 1x 2 BEDROOM UNIT TYPE C 76 m²
CIRCULATION 100 m²
90° 00' 00" TITLE BOUNDARY
40.53 m TOTAL GFA 1,437 m²
PROPOSED 3m ACCESS EASEMENT POPULATION DENSITY 145.22 PERSONS/Ha
REAR SB
180° 00' 00"
6000
50.31 m
TERRACED RETAINING WALL
TITLE BOUNDARY
SWALE
TIMBER WALKWAY BUILDING COMPONENT AREA SITE %
DP
COMMUNITY AREA / OVERALL SITE 2,548m² -
4740 BBQ AREA BUILDING GFA (PLOT RATIO) 1,437m² 56%
PRIVATE 78m² 834m² 33%
FLOOR PLATE (SITE COVER)
COURTYARD
11200
8370
PRIVATE OPEN SPACE 353m² 14%
39m²
DP COMMUNAL OPEN SPACE 613m² 24%
LANDSCAPING 285m² 11%
CARPARKS PROVIDED: 25 (4 VISITOR PARKS)
LOCATION PLAN
7
359° 39' 40"
25.15 m
CAR PARK SECURITY DP
8510
GATE UNDER 8
4740 SCALE 1 : 2000
CONCRETE RAMP PRIVATE
DOWN TO BASEMENT COURTYARD LOCAL AUTHORITY:
NOOSA COUNCIL
OVERALL BUILDING LENGTH
39m²
TERRACED
LANDSCAPE WALL
90° 00' 00"
2000
@ 5%
7520
@ 1 IN 6 (16.5%)
2000
@5% 4740
DA ISSUE
38313
TITLE BOUNDARY
CLIENT:
945
20.52 m 7 BATTEN PRIVACY
1 FENCE TO GROUND
BASEMENT OPENING
FLOOR COURTYARDS SERINA PTY LTD
8510
A-05-00
3
RL. 6.00 RAMP DOWN A-04-01
DP RETAIN EXISTING
6000
TITLE BOUNDARY
PRIVATE VEGITATION ON
COURTYARD EASTERN BOUNDARY
39m²
4
3327
A-04-01 DP
359° 39' 41"
6
8633
BOULDER RETAINING
25.17 m
REFUSE 4740
ENCLOSURE PRIVATE
COURTYARD
RL. 7.30 39m²
7500
SERVICE VEHICLE ZONE
7
CONCRETE DRIVEWAY DP EXISTING MACADAMIA
RL. 7.25 LANDSCAPING INTER PTY LTD
TREE TO BE RETAINED
ENTRY
01 02 03 04 DETENTION
LANDSCAPING RAMP UP TANK UNDER
5
5400
VISITOR PARKING LANDSCAPE
RL 6.25
SITE PERSPECTIVE 01 PROJECT
FRONT SB
6000
RL 5.8
BIO RETENTION SHOWN SCALE APARTMENT DESIGN
LANDSCAPING HATCHED. REFER 30-32 DOONELA STREET TEWANTIN
LANDSCAPE LOT 32 LOT 903 LANDSCAPE PAVED FOOTPATH SEWER LINE UNDER ENGINEERS DRAWINGS
5
Revision Issue Details Issued Date
RL.6.0 A DRAFT MT 25.04.15
EXISTING SITE EXISTING SITE 2 EXISTING CONCRETE FOOTPATH B AMENDMENTS MT 10.05.15
TREES TO TREE TO REMAIN A-04-01 C DA ISSUE MT 24.05.15
REMAIN IF IF PRACTICAL 3.95
D AMENDMENTS MT 28.05.15
5
PRACTICAL CONCRETE CROSSOVER
PEDESTRIAN
CROSSING
5400 4120 9600
CROSSOVER 4 parks @ 2400mm DOONELL A STREET
DETAILED SITE PLAN Drawn:
Checked:
MT
MT
SCALE 1 : 200
COVER SHEET & SITE PLAN
SCALE: As indicated
@A1 REV:
SITE PERSPECTIVE 02
SCALE 0000-A-00-01 D
Page 24
7 aquaintel Appendix 2: Rational Method and WBNM Output 18 ntelligent Water Management Solutions
Page 25
RATIONAL METHOD SUMMARY & RAINFALL DATA Project Project # Rainfall IFD Input Data (Australian Rainfall and Runoff 30-32 Doonella Street, Tewantin 71, "ly "Ly oT Ts Ls F2 F50 G 52.3 10.25 3.45 94.28 23.64 8.6 44 17.61 0.1 Rainfall Intensity (mm/hr) DURATION AVERAGE RECURRENCE INTERVAL (years) (hours) | (minutes) 1 yr 2 yr 5 yr 10 yr 20 yr 50 yr 100 yr 0.083 5 129 164 202 223 253 291 321 0.1 6 121 154 190 210 238 274 302 0.167 10 100 127 156 173 196 227 250 0.25 15 84 106 131 146 165 191 211 0.333 20 73 93 115 128 145 168 185 0.417 25 65 83 103 115 130 151 167 0.5 30 59 76 94 105 119 138 153 0.75 45 47.8 61 76 85 97 112 124 1 60 40.8 52 65 72 83 96 106 1.5 90 31.2 40.1 51 57 66 77 86 2 120 25.8 33.3 42.7 48.3 56 66 74 3 180 19.6 25.4 33.2 38.0 44.2 53 59 45 270 14.9 19.4 25.8 29.8 34.9 41.9 47.3 6 360 12.2 16.1 21.6 25.0 29.5 35.6 40.4 9 540 9.31 12.3 16.8 19.7 23.4 28.4 32.5 12 720 7.67 10.2 14.1 16.6 19.8 24.2 27.8 18 1080 6.06 8.06 11.2 13.3 15.9 19.5 22.5 24 1440 5.13 6.83 9.56 11.3 13.6 16.8 19.3 30 1800 4.49 5.99 8.42 10.0 12.0 14.8 17.1 36 2160 4.02 5.37 7.56 9.00 10.8 13.4 15.5 48 2880 3.35 4.49 6.36 7.59 9.16 11.4 13.1 72 4320 2.55 3.42 4.89 5.86 7.10 8.83 10.2 Catchment Data Details: Existing Variable Value Units Area: 0.253 ha Cro 0.70 fraction Rational Method Summary Adopted Time of Concentration (tc) 5.00 __ Minutes (or 0.08 hours) Variable T Intens actor mm/hr. Discharge (m*/s 129 0.05 AVERAGE RECURRENCE INTERVAL 164 0.07 202 0.09 223 0.11 253 0.13 291 0.16 C:\Users\Brendon\Documents\WORK\02 Projects\01 Aquaintel\30 30-32 Doonella Street SMP\Design\WBNM\Rational_Method_30-32 Doonella St 8/11/2015
Page 26
iWBNM Lite
iWBNM Lite
1 Project Details
Project ID
Project Description Unit Development - EXISTING CASE
Project Location 30-32 Doonella Street, Tewantin, QLD
2 General Parameters 3 Rain Gauge Data
Lag Parameter (C) 1.8 Choose Rain Gauge from Database Add to Database: Name Tewantin Zone 3
Stream Lag Factor 1 2yr 50yr
Tewantin
Calculation Timestep 1 mins 1 hr 52.3 94.28 4.4 F2 Ave Rain 1649
Initial Loss 0 mm Tewantin 12 hr 10.25 23.64 17.61 F50 %Rough 0
Continuing Loss Rate 2.5 mm/hr 72 hr 3.45 8.6 0.11 G MAF (0.0-1.0) 0.87
4 Topology 5 Structure Data
Subarea Name Connects to Area Impervious Subarea IWL Storage_Fac Type Elevation Storage
SINK ha % m m3
1 SUBA SINK 0.2527 20 Weir 1 2 Pipe/Box 1 2 3
2 Diverts to Sub Diverts to Sub
3 Crest Elev [m] Invert [m]
4 Length [m] No. Barrels
5 Weir Coeff Ent. Type
6 Disch-Factor Dia/(Width)[mm]
7 Directed to (Height)[mm]
8 Delay [mins] Disch-Factor
9 Directed to
10 Delay [mins]
Total 0.3 20.0
6 Storm Data 7 Save & Run
Storm ARI Duration [mins]
1 1 25 Save & Run Shortcut: Shift + Ctrl + L
2 2 25
3 5 25 Most Recent File: C:\Users\Brendon\Documents\WORK\02 Projects\01 Aquaintel\30 30-32 Doonella Street SMP\Design\WBNM\E01\E01.wbn
4 10 25 Location of WBNMRun.exe: C:\Users\Brendon\Documents\WORK\WBNM\wbnm2012\2012_executables\WBNMrun.exe
5 20 25
6 50 25
7 100 25
8 PMF 15
8 Results
RESULTS FOR: C:\Users\Brendon\Documents\WORK\02 Projects\01 Aquaintel\30 30-32 Doonella Street SMP\Design\WBNM\E01\E01_Meta.out
Storm 1 2 3 4 5 6 7 8 Hydrographs
1 Yr 25 Min 2 Yr 25 Min 5 Yr 25 Min 10 Yr 25 Min 20 Yr 25 Min 50 Yr 25 Min 100 Yr 25 Min PMF Yr 15 Min 0.8
3
Peak Flowrates at Subarea Outlet [Q m /s] SUBA(1 Yr
15 Min)
SUBA 0.076 0.097 0.122 0.135 0.155 0.162 0.180 0.685
0.7 SUBA(2 Yr
15 Min)
SUBA(5 Yr
15 Min)
0.6 SUBA(10
Yr 15 Min)
SUBA(20
Yr 15 Min)
0.5 SUBA(50
Flowrate [m3/s]
Yr 15 Min)
SUBA(100
Yr 15 Min)
0.4 SUBA(PMF
Yr 15 Min)
()
0.3 ()
Inflow Peak m3/s
()
3
Outflow Peak m /s
Inflow Volume m3 0.2 ()
3
Max Vol Stored m ()
Max Water Elev m 0.1 ()
()
0
0 10 20 30 40 50
Time [mins]
1
Page 27
iWBNM Lite
iWBNM Lite
1 Project Details
Project ID
Project Description Unit Development - DEVELOPED CASE
Project Location 30-32 Doonella Street, Tewantin, QLD
2 General Parameters 3 Rain Gauge Data
Lag Parameter (C) 1.8 Choose Rain Gauge from Database Add to Database: Name Tewantin Zone 3 Add
Stream Lag Factor 1 2yr 50yr
Tewantin
Calculation Timestep 1 mins 1 hr 52.3 94.28 4.4 F2 Ave Rain 1649
Initial Loss 0 mm Tewantin 12 hr 10.25 23.64 17.61 F50 %Rough 0
Continuing Loss Rate 2.5 mm/hr 72 hr 3.45 8.6 0.11 G MAF (0.0-1.0) 0.87
4 Topology 5 Structure Data
Subarea Name Connects to Area Impervious Subarea IWL Storage_Fac Type Elevation Storage
SINK ha % m m3
1 SUBA SINK 0.2527 75 Weir 1 2 Pipe/Box 1 2 3
2 Diverts to Sub Diverts to Sub
3 Crest Elev [m] Invert [m]
4 Length [m] No. Barrels
5 Weir Coeff Ent. Type
6 Disch-Factor Dia/(Width)[mm]
7 Directed to (Height)[mm]
8 Delay [mins] Disch-Factor
9 Directed to
10 Delay [mins]
Total 0.3 75.0
6 Storm Data 7 Save & Run
Storm ARI Duration [mins]
1 1 15 Save & Run Shortcut: Shift + Ctrl + L
2 2 15
3 5 15 Most Recent File: C:\Users\Brendon\Documents\WORK\02 Projects\01 Aquaintel\30 30-32 Doonella Street SMP\Design\WBNM\E01\D01.wbn
4 10 15 Location of WBNMRun.exe: C:\Users\Brendon\Documents\WORK\WBNM\wbnm2012\2012_executables\WBNMrun.exe
5 20 15
6 50 15
7 100 15
8 PMF 15
8 Results
RESULTS FOR: C:\Users\Brendon\Documents\WORK\02 Projects\01 Aquaintel\30 30-32 Doonella Street SMP\Design\WBNM\E01\D01_Meta.out
Storm 1 2 3 4 5 6 7 8 Hydrographs
1 Yr 15 Min 2 Yr 15 Min 5 Yr 15 Min 10 Yr 15 Min 20 Yr 15 Min 50 Yr 15 Min 100 Yr 15 Min PMF Yr 15 Min 0.8
3
Peak Flowrates at Subarea Outlet [Q m /s] SUBA(1 Yr
15 Min)
SUBA 0.082 0.104 0.128 0.142 0.161 0.176 0.194 0.719
0.7 SUBA(2 Yr
15 Min)
SUBA(5 Yr
15 Min)
0.6 SUBA(10
Yr 15 Min)
SUBA(20
Yr 15 Min)
0.5 SUBA(50
Flowrate [m3/s]
Yr 15 Min)
SUBA(100
Yr 15 Min)
0.4 SUBA(PMF
Yr 15 Min)
()
0.3 ()
Inflow Peak m3/s
()
3
Outflow Peak m /s
Inflow Volume m3 0.2 ()
3
Max Vol Stored m ()
Max Water Elev m 0.1 ()
()
0
0 10 20 30 40 50
Time [mins]
1
Page 28
iWBNM Lite
iWBNM Lite
1 Project Details
Project ID
Project Description Unit Development - MITIGATED CASE
Project Location 30-32 Doonella Street, Tewantin, QLD
2 General Parameters 3 Rain Gauge Data
Lag Parameter (C) 1.8 Choose Rain Gauge from Database Add to Database: Name Tewantin Zone 3 Add
Stream Lag Factor 1 2yr 50yr
Tewantin
Calculation Timestep 1 mins 1 hr 52.3 94.28 4.4 F2 Ave Rain 1649
Initial Loss 0 mm Tewantin 12 hr 10.25 23.64 17.61 F50 %Rough 0
Continuing Loss Rate 2.5 mm/hr 72 hr 3.45 8.6 0.11 G MAF (0.0-1.0) 0.87
4 Topology 5 Structure Data
Subarea Name Connects to Area Impervious Subarea IWL Storage_Fac Type Elevation Storage
SINK ha % SUBA 0 1 OUTLET m m3
1 SUBA SINK 0.2527 75 Weir 1 2 Pipe/Box 1 2 3 0 0
2 Diverts to Sub Diverts to Sub OUTLET 1 20
3 Crest Elev [m] Invert [m] 0
4 Length [m] No. Barrels 1
5 Weir Coeff Ent. Type 1
6 Disch-Factor Dia/(Width)[mm] 300
7 Directed to (Height)[mm]
8 Delay [mins] Disch-Factor 1
9 Directed to TOP
10 Delay [mins] 0
Total 0.3 75.0
6 Storm Data 7 Save & Run
Storm ARI Duration [mins]
1 1 15 Save & Run Shortcut: Shift + Ctrl + L
2 2 15
3 5 15 Most Recent File: C:\Users\Brendon\Documents\WORK\02 Projects\01 Aquaintel\30 30-32 Doonella Street SMP\Design\WBNM\E01\M01.wbn
4 10 15 Location of WBNMRun.exe: C:\Users\Brendon\Documents\WORK\WBNM\wbnm2012\2012_executables\WBNMrun.exe
5 20 15
6 50 15
7 100 15
8 PMF 15
8 Results
RESULTS FOR: C:\Users\Brendon\Documents\WORK\02 Projects\01 Aquaintel\30 30-32 Doonella Street SMP\Design\WBNM\E01\M01_Meta.out
Storm 1 2 3 4 5 6 7 8 Hydrographs
1 Yr 15 Min 2 Yr 15 Min 5 Yr 15 Min 10 Yr 15 Min 20 Yr 15 Min 50 Yr 15 Min 100 Yr 15 Min PMF Yr 15 Min 0.8
3
Peak Flowrates at Subarea Outlet [Q m /s] SUBA(1 Yr
15 Min)
SUBA 0.073 0.093 0.115 0.127 0.144 0.160 0.176 0.692
0.7 SUBA(2 Yr
15 Min)
SUBA(5 Yr
15 Min)
0.6 SUBA(10
Yr 15 Min)
SUBA(20
Yr 15 Min)
0.5 SUBA(50
Flowrate [m3/s]
Yr 15 Min)
SUBA(100
Yr 15 Min)
0.4 SUBA(PMF
Yr 15 Min)
()
0.3 ()
Inflow Peak 0.082 0.104 0.128 0.142 0.161 0.176 0.194 0.719 m3/s
()
3
Outflow Peak 0.073 0.093 0.115 0.127 0.144 0.160 0.176 0.692 m /s
Inflow Volume 52 65 80 89 101 116 128 545 m3 0.2 ()
3
Max Vol Stored 8 11 13 14 16 18 20 78 m ()
Max Water Elev 0.415 0.527 0.649 0.719 0.817 0.904 0.997 3.914 m 0.1 ()
()
0
0 10 20 30 40 50
Time [mins]
1