APPENDIX C
CCT WWTW Current and Projected Return Flows
ORGANIC LOAD HANDLED BY ALL TREATMENT WORKS 550,000 5,000,000
y = 2,633x + 865,962 525,000 4,750,000
500,000
4,500,000
475,000
4,250,000 450,000
425,000 4,000,000
400,000 3,750,000 population equivalents Kg Chem Ox Demand / day 375,000
3,500,000
350,000
3,250,000 325,000 RATE OF GROWTH = 3.3% pa
300,000 3,000,000
Jul-97Oct-97Jan-98Apr-98Jul-98Oct-98Jan-99Apr-99Jul-99Oct-99Jan-00Apr-00Jul-00Oct-00Jan-01Apr-01Jul-01Oct-01Jan-02Apr-02Jul-02Oct-02Jan-03Apr-03Jul-03Oct-03Jan-04Apr-04Jul-04Oct-04Jan-05Apr-05Jul-05 TOTAL FOR ALL WORKS
ALL WORKS: FLOW 850 800 750 700 650 y = 0.1084x + 404.54 600 550 500 450 y = 0.2167x + 233.46
Ml/d 400 350 300 250 200 150 ANNUAL RATE OF GROWTH: 100 total flow = 0.7% 50 dry weather flow = 0.7% 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Daily Flow Dry weather flow design ADWF Linear (Daily Flow) Linear (Dry weather flow)
ALL WORKS: ORGANIC LOAD 6,000,000
5,500,000
5,000,000
4,500,000
4,000,000
3,500,000 y = 2,633x + 865,962 3,000,000
2,500,000
2,000,000
Population Equivalents 1,500,000 ANNUAL RATE OF GROWTH: total load = 3.6% 1,000,000
500,000
0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Population Equivalents design organic load Linear (Population Equivalents) ATHLONE WASTEWATER TREATMENT WORKS
ATHLONE WWTW: FLOW 180 Flow bypassed to Cape Flats 160
140 y = 0.1514x - 103.09
120
100 Ml/d 80 y = 0.1909x - 162.08
60
40 ANNUAL RATE OF GROWTH: 20 total flow = 4.2% dry weather flow = 5.6% 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020 Daily flow Dry weather flow Hyd Cap CWC proj.1 Linear (Dry weather flow) Linear (Daily flow)
ATHLONE WWTW: ORGANIC LOAD
1,500,000 Flow bypassed to 1,350,000 Cape Flats y = 827x - 374,961 1,200,000
1,050,000
900,000
750,000
600,000
450,000 Population Equivalents 300,000 ANNUAL RATE OF GROWTH: 150,000 total load = 3.1%
0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019
design organic load Population Equivalents Linear (Population Equivalents) BELLVILLE WASTEWATER TREATMENT WORKS
BELLVILLE WWTW: FLOW 90
80
70
60
50 25 Ml/d extension to Ml/d 40 handle flow from Bottelary Area 30 Some flow diverted to Kraaifontein in this 20 period
10
0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Ml/d Rated Hyd Cap Linear (Ml/d)
BELLVILLE WWTW: ORGANIC LOAD
850,000 800,000 PST's added 750,000 700,000 650,000 600,000 550,000 500,000 450,000 400,000 350,000 300,000 250,000
Population Equivalents 200,000 150,000 100,000 ANNUAL RATE OF GROWTH: total load = 3.3% 50,000 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Design Organic Load Population Equivalents Linear (Population Equivalents)
66 BORCHERDS QUARRY WASTEWATER TREATMENT WORKS
BORCHERDS QUARRY WWTW: FLOW 40 y = 0.0733x - 62.292
35 y = 0.0741x - 63.416
30
25
20 Ml/d
15
10 ANNUAL RATE OF GROWTH: total flow = 3.1% 5 dry weather flow = 2.6%
0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Daily Flow Dry weather flow Design ADWF CWC proj.1 Linear (Daily Flow) Linear (Dry weather flow)
BORCHERDS QUARRY WWTW: ORGANIC LOAD y = 630x - 457,747
450,000
400,000
350,000
300,000
250,000
200,000
150,000
Population Equivalents 100,000
50,000 ANNUAL RATE OF GROWTH: total load = 1.3% 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Design Organic Load Population Equivalents Linear (Population Equivalents) CAMPS BAY SEA OUTFALL
CAMPS BAY: FLOW
4.0
3.5
3.0 y = 0.0004x + 1.6452 2.5
2.0
Ml/d y = 0.0007x + 1.1883
1.5
1.0
0.5 ANNUAL RATE OF GROWTH: total flow = 0.8% dry weather flow = 1.4% 0.0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Daily Flow Dry weather flow design ADWF Linear (Daily Flow) Linear (Dry weather flow)
CAMPS BAY: ORGANIC LOAD 25,000 y = 43.028x - 38026 22,500
20,000
17,500
15,000
12,500
10,000
7,500 Population Equivalents 5,000
2,500 ANNUAL RATE OF GROWTH: total load = 3.4% 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Population Equivalents Linear (Population Equivalents) CAPE FLATS WASTEWATER TREATMENT WORKS
CAPE FLATS WWTW: FLOW 275
y = -0.1687x + 355.84 250
225
200
175
150
Ml/d 125 y = -0.2791x + 476.66 100
75
50 ANNUAL RATE OF GROWTH: total flow = -1.1% dry weather flow = -2.3% 25
0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Daily Flow Dry weather flow Design ADWF CWC proj.1 Linear (Daily Flow) Linear (Dry weather flow)
CAPE FLATS WWTW: ORGANIC LOAD 1,800,000
1,650,000 y = 1,674x - 1,006,587 1,500,000
1,350,000
1,200,000
1,050,000
900,000
750,000
600,000
450,000 Population Equivalents 300,000 ANNUAL RATE OF GROWTH: total load = 2.6% 150,000
0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Population Equivalents design organic load Linear (Population Equivalents) ORGANIC LOAD HANDLED BY ALL TREATMENT WORKS 550,000 5,000,000
y = 2,633x + 865,962 525,000 4,750,000
500,000
4,500,000
475,000
4,250,000 450,000
425,000 4,000,000
400,000 3,750,000 population equivalents Kg Chem Ox Demand / day 375,000
3,500,000
350,000
3,250,000 325,000 RATE OF GROWTH = 3.3% pa
300,000 3,000,000
Jul-97Oct-97Jan-98Apr-98Jul-98Oct-98Jan-99Apr-99Jul-99Oct-99Jan-00Apr-00Jul-00Oct-00Jan-01Apr-01Jul-01Oct-01Jan-02Apr-02Jul-02Oct-02Jan-03Apr-03Jul-03Oct-03Jan-04Apr-04Jul-04Oct-04Jan-05Apr-05Jul-05 TOTAL FOR ALL WORKS
ALL WORKS: FLOW 850 800 750 700 650 y = 0.1084x + 404.54 600 550 500 450 y = 0.2167x + 233.46
Ml/d 400 350 300 250 200 150 ANNUAL RATE OF GROWTH: 100 total flow = 0.7% 50 dry weather flow = 0.7% 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Daily Flow Dry weather flow design ADWF Linear (Daily Flow) Linear (Dry weather flow)
ALL WORKS: ORGANIC LOAD 6,000,000
5,500,000
5,000,000
4,500,000
4,000,000
3,500,000 y = 2,633x + 865,962 3,000,000
2,500,000
2,000,000
Population Equivalents 1,500,000 ANNUAL RATE OF GROWTH: total load = 3.6% 1,000,000
500,000
0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Population Equivalents design organic load Linear (Population Equivalents) ATHLONE WASTEWATER TREATMENT WORKS
ATHLONE WWTW: FLOW 180 Flow bypassed to Cape Flats 160
140 y = 0.1514x - 103.09
120
100 Ml/d 80 y = 0.1909x - 162.08
60
40 ANNUAL RATE OF GROWTH: 20 total flow = 4.2% dry weather flow = 5.6% 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020 Daily flow Dry weather flow Hyd Cap CWC proj.1 Linear (Dry weather flow) Linear (Daily flow)
ATHLONE WWTW: ORGANIC LOAD
1,500,000 Flow bypassed to 1,350,000 Cape Flats y = 827x - 374,961 1,200,000
1,050,000
900,000
750,000
600,000
450,000 Population Equivalents 300,000 ANNUAL RATE OF GROWTH: 150,000 total load = 3.1%
0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019
design organic load Population Equivalents Linear (Population Equivalents) BELLVILLE WASTEWATER TREATMENT WORKS
BELLVILLE WWTW: FLOW 90
80
70
60
50 25 Ml/d extension to Ml/d 40 handle flow from Bottelary Area 30 Some flow diverted to Kraaifontein in this 20 period
10
0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Ml/d Rated Hyd Cap Linear (Ml/d)
BELLVILLE WWTW: ORGANIC LOAD
850,000 800,000 PST's added 750,000 700,000 650,000 600,000 550,000 500,000 450,000 400,000 350,000 300,000 250,000
Population Equivalents 200,000 150,000 100,000 ANNUAL RATE OF GROWTH: total load = 3.3% 50,000 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Design Organic Load Population Equivalents Linear (Population Equivalents)
66 BORCHERDS QUARRY WASTEWATER TREATMENT WORKS
BORCHERDS QUARRY WWTW: FLOW 40 y = 0.0733x - 62.292
35 y = 0.0741x - 63.416
30
25
20 Ml/d
15
10 ANNUAL RATE OF GROWTH: total flow = 3.1% 5 dry weather flow = 2.6%
0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Daily Flow Dry weather flow Design ADWF CWC proj.1 Linear (Daily Flow) Linear (Dry weather flow)
BORCHERDS QUARRY WWTW: ORGANIC LOAD y = 630x - 457,747
450,000
400,000
350,000
300,000
250,000
200,000
150,000
Population Equivalents 100,000
50,000 ANNUAL RATE OF GROWTH: total load = 1.3% 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Design Organic Load Population Equivalents Linear (Population Equivalents) CAMPS BAY SEA OUTFALL
CAMPS BAY: FLOW
4.0
3.5
3.0 y = 0.0004x + 1.6452 2.5
2.0
Ml/d y = 0.0007x + 1.1883
1.5
1.0
0.5 ANNUAL RATE OF GROWTH: total flow = 0.8% dry weather flow = 1.4% 0.0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Daily Flow Dry weather flow design ADWF Linear (Daily Flow) Linear (Dry weather flow)
CAMPS BAY: ORGANIC LOAD 25,000 y = 43.028x - 38026 22,500
20,000
17,500
15,000
12,500
10,000
7,500 Population Equivalents 5,000
2,500 ANNUAL RATE OF GROWTH: total load = 3.4% 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Population Equivalents Linear (Population Equivalents) CAPE FLATS WASTEWATER TREATMENT WORKS
CAPE FLATS WWTW: FLOW 275
y = -0.1687x + 355.84 250
225
200
175
150
Ml/d 125 y = -0.2791x + 476.66 100
75
50 ANNUAL RATE OF GROWTH: total flow = -1.1% dry weather flow = -2.3% 25
0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Daily Flow Dry weather flow Design ADWF CWC proj.1 Linear (Daily Flow) Linear (Dry weather flow)
CAPE FLATS WWTW: ORGANIC LOAD 1,800,000
1,650,000 y = 1,674x - 1,006,587 1,500,000
1,350,000
1,200,000
1,050,000
900,000
750,000
600,000
450,000 Population Equivalents 300,000 ANNUAL RATE OF GROWTH: total load = 2.6% 150,000
0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Population Equivalents design organic load Linear (Population Equivalents) GORDONS BAY WASTEWATER TREATMENT WORKS
GORDON'S BAY WWTW: FLOW 9
8
7
6 y = 0.0101x - 9.9521
5
Ml/d 4
3 y = 0.0077x - 7.2896
2 ANNUAL RATE OF GROWTH: 1 total flow = 7.5% dry weather flow = 6.3%
0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Daily Flow Dry weather flow Design ADWF CWC proj.1 Linear (Daily Flow) Linear (Dry weather flow)
GORDON'S BAY WWTW: ORGANIC LOAD 40,000
35,000 y = 81.307x - 86887
30,000
25,000
20,000
15,000 Population Equivalents 10,000
ANNUAL RATE OF GROWTH: 5,000 total load = 11.5%
0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Population Equivalents Design Organic Load Linear (Population Equivalents) GREEN POINT SEA OUTFALL: FLOW & LOAD
GREEN POINT: FLOW 35 y = -0.0041x + 31.221
30
25
y = -0.0041x + 29.982 20 Ml/d 15
10
5 ANNUAL RATE OF GROWTH: total flow = -0.2% dry weather flow = -0.7% 0
Jul-1997Jul-1998Jul-1999Jul-2000Jul-2001Jul-2002Jul-2003Jul-2004Jul-2005Jul-2006Jul-2007Jul-2008Jul-2009Jul-2010Jul-2011Jul-2012Jul-2013Jul-2014Jul-2015Jul-2016Jul-2017Jul-2018Jul-2019Jul-2020
Daily Flow Dry weather flow design ADWF Linear (Daily Flow) Linear (Dry weather flow)
GREEN POINT: ORGANIC LOAD
275,000 y = 197.24x - 81012
250,000
225,000
200,000
175,000
150,000
125,000
100,000
75,000 Population Equivalents 50,000
25,000 ANNUAL RATE OF GROWTH: total load = 1.2% 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Population Equivalents Linear (Population Equivalents) HOUT BAY SEA OUTFALL
HOUT BAY: FLOW 10
9
8
7
6
5 Ml/d 4 y = -0.0072x + 12.851 3
2 ANNUAL RATE OF GROWTH: y = -0.0129x + 19.732 1 total flow = -1.0% dry weather flow = -2.3% 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Daily Flow Dry weather flow design ADWF Linear (Daily Flow) Linear (Dry weather flow)
HOUT BAY: ORGANIC LOAD 100,000
90,000
80,000 y = -16.657x + 53833 70,000
60,000
50,000
40,000
30,000 Population Equivalents 20,000 ANNUAL RATE OF GROWTH: 10,000 total load = 2.0%
0 Jan-1998 Jan-1999 Jan-2000 Jan-2001 Jan-2002 Jan-2003 Jan-2004 Jan-2005 Jan-2006 Jan-2007 Jan-2008 Jan-2009 Jan-2010 Jan-2011 Jan-2012 Jan-2013 Jan-2014 Jan-2015 Jan-2016 Jan-2017 Jan-2018 Jan-2019 Jan-2020
Population Equivalents design organic load Linear (Population Equivalents) KRAAIFONTEIN WASTEWATER TREATMENT WORKS
KRAAIFONTEIN WWTW: FLOW
18
16 y = 0.0466x - 50.034
14
12
10 y = 0.0442x - 47.708
Ml/d 8
6
4 ANNUAL RATE OF GROWTH: total flow = 9.4% 2 dry weather flow = 9.3%
0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Daily Flow Dry weather flow Design ADWF CWC estimate Linear (Dry weather flow) Linear (Daily Flow)
KRAAIFONTEIN WWTW: ORGANIC LOAD 170,000 160,000 150,000 140,000 130,000 y = 358.85x - 390135 120,000 110,000 100,000 90,000 80,000 70,000 60,000 Population Equivalents 50,000 40,000 30,000 ANNUAL RATE OF GROWTH: 20,000 total load = 10.1% 10,000 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Population Equivalents design organic load Linear (Population Equivalents) LLANDUDNO WASTEWATER TREATMENT WORKS
LLANDUDNO WWTW: FLOW 0.60
0.55
0.50
0.45
0.40
0.35 y = 0.0003x - 0.1929 0.30
ML/d 0.25 y = 0.0002x - 0.0924 0.20
0.15
0.10 ANNUAL RATE OF GROWTH: 0.05 total flow = 3.0% dry weather flow = 4.1% 0.00 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020 Daily Flow Dry weather flow design ADWF Linear (Daily Flow) Linear (Dry weather flow)
LLANDUDNO WWTW: ORGANIC LOAD 3,200
2,800
2,400
y = 1.1204x - 182.85 2,000
1,600
1,200
800 Population Equivalents
400 ANNUAL RATE OF GROWTH: total load = 2.0% 0 Jan-1998 Jan-1999 Jan-2000 Jan-2001 Jan-2002 Jan-2003 Jan-2004 Jan-2005 Jan-2006 Jan-2007 Jan-2008 Jan-2009 Jan-2010 Jan-2011 Jan-2012 Jan-2013 Jan-2014 Jan-2015 Jan-2016 Jan-2017 Jan-2018 Jan-2019 Jan-2020
Population Equivalents design organic load Linear (Population Equivalents) MACASSAR WASTEWATER TREATMENT WORKS
MACASSAR WWTW: FLOW 80.0 75.0 20Ml/d extension 70.0 2 addn. SST's commissioned commissioned 65.0 y = 0.1219x - 112.75 60.0 55.0 50.0 y = 0.1131x - 104.77 45.0 40.0
Ml/d 35.0 30.0 25.0 20.0 15.0 ANNUAL RATE OF GROWTH: 10.0 total flow = 5.4% 5.0 dry weather flow = 6.0% 0.0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Daily Flow Dry weather flow Design ADWF CWC proj.1 Linear (Daily Flow) Linear (Dry weather flow)
MACASSAR WWTW: ORGANIC LOAD 550,000
500,000 y = 798.2x - 783937
450,000
400,000
350,000
300,000
250,000
200,000
150,000 Population Equivalents 100,000 ANNUAL RATE OF GROWTH: 50,000 total load = 6.5%
0 Jul-97 Jul-98 Jul-99 Jul-00 Jul-01 Jul-02 Jul-03 Jul-04 Jul-05 Jul-06 Jul-07 Jul-08 Jul-09 Jul-10 Jul-11 Jul-12 Jul-13 Jul-14 Jul-15 Jul-16 Jul-17 Jul-18 Jul-19 Jul-20
Population Equivalents Design Organic Load Linear (Population Equivalents) MELKBOSSTRAND WASTEWATER TREATMENT WORKS
MELKBOSSTRAND WWTW: FLOW 27
24 ANNUAL RATE OF GROWTH: total flow = 8.7% 21 ANNUAL RATE OF GROWTH dry weather flow = 7.2% EXCLUDES FLOW DIVERTED FROM TABLEVIEW AREA 18
15 Ml/d 12
y = 0.0118x - 12.47 9
6
3 y = 0.0115x - 12.257
0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020 Daily Flow design ADWF CIVtech Dry weather flow Linear (Daily Flow) Linear (Dry weather flow)
MELKBOSSTRAND WWTW: ORGANIC LOAD 150,000
137,500 y = 69.031x - 76029 125,000
112,500 20Ml/d extensions commissioned 100,000
87,500 ANNUAL RATE OF GROWTH: 75,000 total load = 8.6%
62,500 ANNUAL RATE OF GROWTH EXCLUDES FLOW DIVERTED 50,000 FROM TABLEVIEW AREA 37,500 Population Equivalents
25,000
12,500
0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Population Equivalents design organic load Linear (Population Equivalents) MITCHELLS PLAIN WASTEWATER TREATMENT WORKS
MITCHELLS PLAIN WWTW: FLOW
45 y = 0.0198x + 6.5067
40
35
30 y = 0.0184x + 8.2804
25 Ml/d 20
15
10 ANNUAL RATE OF GROWTH: total flow = 0.7% 5 dry weather flow = 0.5%
0
Jul-1997 Jul-1999 Jul-2001 Jul-2003 Jul-2005 Jul-2007 Jul-2009 Jul-2011 Jul-2013 Jul-2015 Jul-2017 Jul-2019
Daily Flow Dry weather flow design ADWF Linear (Daily Flow) Linear (Dry weather flow)
MITCHELLS PLAIN WWTW: ORGANIC LOAD 550,000 y = 1,140x - 1,031,966 500,000
450,000
400,000
350,000
300,000
250,000
200,000
150,000
100,000 ANNUAL RATE OF GROWTH: 50,000 total load = 3.1%
0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Population Equivalents design organic load Linear (Population Equivalents) GORDONS BAY WASTEWATER TREATMENT WORKS
GORDON'S BAY WWTW: FLOW 9
8
7
6 y = 0.0101x - 9.9521
5
Ml/d 4
3 y = 0.0077x - 7.2896
2 ANNUAL RATE OF GROWTH: 1 total flow = 7.5% dry weather flow = 6.3%
0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Daily Flow Dry weather flow Design ADWF CWC proj.1 Linear (Daily Flow) Linear (Dry weather flow)
GORDON'S BAY WWTW: ORGANIC LOAD 40,000
35,000 y = 81.307x - 86887
30,000
25,000
20,000
15,000 Population Equivalents 10,000
ANNUAL RATE OF GROWTH: 5,000 total load = 11.5%
0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Population Equivalents Design Organic Load Linear (Population Equivalents) GREEN POINT SEA OUTFALL: FLOW & LOAD
GREEN POINT: FLOW 35 y = -0.0041x + 31.221
30
25
y = -0.0041x + 29.982 20 Ml/d 15
10
5 ANNUAL RATE OF GROWTH: total flow = -0.2% dry weather flow = -0.7% 0
Jul-1997Jul-1998Jul-1999Jul-2000Jul-2001Jul-2002Jul-2003Jul-2004Jul-2005Jul-2006Jul-2007Jul-2008Jul-2009Jul-2010Jul-2011Jul-2012Jul-2013Jul-2014Jul-2015Jul-2016Jul-2017Jul-2018Jul-2019Jul-2020
Daily Flow Dry weather flow design ADWF Linear (Daily Flow) Linear (Dry weather flow)
GREEN POINT: ORGANIC LOAD
275,000 y = 197.24x - 81012
250,000
225,000
200,000
175,000
150,000
125,000
100,000
75,000 Population Equivalents 50,000
25,000 ANNUAL RATE OF GROWTH: total load = 1.2% 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Population Equivalents Linear (Population Equivalents) HOUT BAY SEA OUTFALL
HOUT BAY: FLOW 10
9
8
7
6
5 Ml/d 4 y = -0.0072x + 12.851 3
2 ANNUAL RATE OF GROWTH: y = -0.0129x + 19.732 1 total flow = -1.0% dry weather flow = -2.3% 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Daily Flow Dry weather flow design ADWF Linear (Daily Flow) Linear (Dry weather flow)
HOUT BAY: ORGANIC LOAD 100,000
90,000
80,000 y = -16.657x + 53833 70,000
60,000
50,000
40,000
30,000 Population Equivalents 20,000 ANNUAL RATE OF GROWTH: 10,000 total load = 2.0%
0 Jan-1998 Jan-1999 Jan-2000 Jan-2001 Jan-2002 Jan-2003 Jan-2004 Jan-2005 Jan-2006 Jan-2007 Jan-2008 Jan-2009 Jan-2010 Jan-2011 Jan-2012 Jan-2013 Jan-2014 Jan-2015 Jan-2016 Jan-2017 Jan-2018 Jan-2019 Jan-2020
Population Equivalents design organic load Linear (Population Equivalents) KRAAIFONTEIN WASTEWATER TREATMENT WORKS
KRAAIFONTEIN WWTW: FLOW
18
16 y = 0.0466x - 50.034
14
12
10 y = 0.0442x - 47.708
Ml/d 8
6
4 ANNUAL RATE OF GROWTH: total flow = 9.4% 2 dry weather flow = 9.3%
0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Daily Flow Dry weather flow Design ADWF CWC estimate Linear (Dry weather flow) Linear (Daily Flow)
KRAAIFONTEIN WWTW: ORGANIC LOAD 170,000 160,000 150,000 140,000 130,000 y = 358.85x - 390135 120,000 110,000 100,000 90,000 80,000 70,000 60,000 Population Equivalents 50,000 40,000 30,000 ANNUAL RATE OF GROWTH: 20,000 total load = 10.1% 10,000 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Population Equivalents design organic load Linear (Population Equivalents) LLANDUDNO WASTEWATER TREATMENT WORKS
LLANDUDNO WWTW: FLOW 0.60
0.55
0.50
0.45
0.40
0.35 y = 0.0003x - 0.1929 0.30
ML/d 0.25 y = 0.0002x - 0.0924 0.20
0.15
0.10 ANNUAL RATE OF GROWTH: 0.05 total flow = 3.0% dry weather flow = 4.1% 0.00 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020 Daily Flow Dry weather flow design ADWF Linear (Daily Flow) Linear (Dry weather flow)
LLANDUDNO WWTW: ORGANIC LOAD 3,200
2,800
2,400
y = 1.1204x - 182.85 2,000
1,600
1,200
800 Population Equivalents
400 ANNUAL RATE OF GROWTH: total load = 2.0% 0 Jan-1998 Jan-1999 Jan-2000 Jan-2001 Jan-2002 Jan-2003 Jan-2004 Jan-2005 Jan-2006 Jan-2007 Jan-2008 Jan-2009 Jan-2010 Jan-2011 Jan-2012 Jan-2013 Jan-2014 Jan-2015 Jan-2016 Jan-2017 Jan-2018 Jan-2019 Jan-2020
Population Equivalents design organic load Linear (Population Equivalents) MACASSAR WASTEWATER TREATMENT WORKS
MACASSAR WWTW: FLOW 80.0 75.0 20Ml/d extension 70.0 2 addn. SST's commissioned commissioned 65.0 y = 0.1219x - 112.75 60.0 55.0 50.0 y = 0.1131x - 104.77 45.0 40.0
Ml/d 35.0 30.0 25.0 20.0 15.0 ANNUAL RATE OF GROWTH: 10.0 total flow = 5.4% 5.0 dry weather flow = 6.0% 0.0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Daily Flow Dry weather flow Design ADWF CWC proj.1 Linear (Daily Flow) Linear (Dry weather flow)
MACASSAR WWTW: ORGANIC LOAD 550,000
500,000 y = 798.2x - 783937
450,000
400,000
350,000
300,000
250,000
200,000
150,000 Population Equivalents 100,000 ANNUAL RATE OF GROWTH: 50,000 total load = 6.5%
0 Jul-97 Jul-98 Jul-99 Jul-00 Jul-01 Jul-02 Jul-03 Jul-04 Jul-05 Jul-06 Jul-07 Jul-08 Jul-09 Jul-10 Jul-11 Jul-12 Jul-13 Jul-14 Jul-15 Jul-16 Jul-17 Jul-18 Jul-19 Jul-20
Population Equivalents Design Organic Load Linear (Population Equivalents) MELKBOSSTRAND WASTEWATER TREATMENT WORKS
MELKBOSSTRAND WWTW: FLOW 27
24 ANNUAL RATE OF GROWTH: total flow = 8.7% 21 ANNUAL RATE OF GROWTH dry weather flow = 7.2% EXCLUDES FLOW DIVERTED FROM TABLEVIEW AREA 18
15 Ml/d 12
y = 0.0118x - 12.47 9
6
3 y = 0.0115x - 12.257
0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020 Daily Flow design ADWF CIVtech Dry weather flow Linear (Daily Flow) Linear (Dry weather flow)
MELKBOSSTRAND WWTW: ORGANIC LOAD 150,000
137,500 y = 69.031x - 76029 125,000
112,500 20Ml/d extensions commissioned 100,000
87,500 ANNUAL RATE OF GROWTH: 75,000 total load = 8.6%
62,500 ANNUAL RATE OF GROWTH EXCLUDES FLOW DIVERTED 50,000 FROM TABLEVIEW AREA 37,500 Population Equivalents
25,000
12,500
0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Population Equivalents design organic load Linear (Population Equivalents) MITCHELLS PLAIN WASTEWATER TREATMENT WORKS
MITCHELLS PLAIN WWTW: FLOW
45 y = 0.0198x + 6.5067
40
35
30 y = 0.0184x + 8.2804
25 Ml/d 20
15
10 ANNUAL RATE OF GROWTH: total flow = 0.7% 5 dry weather flow = 0.5%
0
Jul-1997 Jul-1999 Jul-2001 Jul-2003 Jul-2005 Jul-2007 Jul-2009 Jul-2011 Jul-2013 Jul-2015 Jul-2017 Jul-2019
Daily Flow Dry weather flow design ADWF Linear (Daily Flow) Linear (Dry weather flow)
MITCHELLS PLAIN WWTW: ORGANIC LOAD 550,000 y = 1,140x - 1,031,966 500,000
450,000
400,000
350,000
300,000
250,000
200,000
150,000
100,000 ANNUAL RATE OF GROWTH: 50,000 total load = 3.1%
0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Population Equivalents design organic load Linear (Population Equivalents) PAROW WASTEWATER TREATMENT WORKS
PAROW WWTW: FLOW
3.0
2.5
Flow restricted from now on 2.0 y = 0.0057x - 5.3408
y = 0.0029x - 1.9219 1.5 Ml/d
1.0
0.5 RATE OF GROWTH: annual flow = 7.7% dry weather flow = 6.6%
0.0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020 Daily Flow Dry weather flow design ADWF CWC proj.1 Linear (Daily Flow) Linear (Dry weather flow)
PAROW WWTW: ORGANIC LOAD 16,000
14,000
12,000 y = 49.238x - 50731
10,000
8,000
6,000
4,000 Population Equivalents
2,000 ANNUAL RATE OF GROWTH: total load = 9.4% 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Population Equivalents design organic load Linear (Population Equivalents) POTSDAM WASTEWATER TREATMENT WORKS
POTSDAM WWTW: FLOW 65
60 y = 0.0981x - 88.881 55 y = 0.0993x - 91.649
50
45
40 Excess flow 35 diverted to Melkbos
Ml/d 30 WWTW 25
20
15
10 ANNUAL RATE OF GROWTH: total flow = 5.2% 5 dry weather flow = 5.8%
0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Daily Flow Dry weather flow design ADWF 1997 Strategic Study projection CIVtech Linear (Daily Flow) Linear (Dry weather flow)
POTSDAM WWTW: ORGANIC LOAD
550,000 y = 1,172x - 1,117,322 500,000
450,000
400,000
350,000
300,000
250,000
200,000 Population Equivalents 150,000
100,000 ANNUAL RATE OF GROWTH: 50,000 total load = 3.9% 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Population Equivalents design organic load Linear (Population Equivalents) POTSDAM WWTW: FLOW/ CAPACITY FORMAL CAPACITY EXTENSION
65 60 55 50 45 40 35 30 Ml/d 25 20 15 10 5 0 Jul-97 Jul-98 Jul-99 Jul-00 Jul-01 Jul-02 Jul-03 Jul-04 Jul-05 Jul-06 Jul-07 Jan-98 Jan-99 DesignJan-00 TreatmentJan-01 CapacityJan-02 Jan-03 Jan-04 Jan-05 Jan-06 Jan-07 Daily Flow 1997 Strategic Study projection Estimated developmental impacts over next 3 years Flocculant Chemical addition (Temporary) SCOTTSDENE WASTEWATER TREATMENT WORKS
SCOTTSDENE WWTW: FLOW
20
18
16
14
12 y = 0.0481x - 51.616 y = 0.0431x - 45.744 10 Ml/d 8
6
4 ANNUAL RATE OF GROWTH: total flow = 12.7% 2 dry weather flow = 12.4%
0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020 Daily Flow Dry weather flow design ADWF divert to or from Linear (Daily Flow) Linear (Dry weather flow)
SCOTTSDENE WWTW: ORGANIC LOAD
150,000 140,000 130,000 120,000 110,000 100,000 90,000 y = 424.12x - 474145 80,000 70,000 60,000 50,000
Population Equivalents 40,000 30,000 20,000 ANNUAL RATE OF GROWTH: total load = 15.2% 10,000 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Population Equivalents design organic load Linear (Population Equivalents) SIMONS TOWN WASTEWATER TREATMENT WORKS
SIMONS TOWN WWTW: FLOW 5.5
5.0
4.5
4.0
3.5 y = 0.0049x - 4.2549
3.0
Ml/d 2.5
2.0 y = 0.0034x - 2.5987 1.5
1.0 ANNUAL RATE OF GROWTH: 0.5 total flow = 4.1% dry weather flow = 2.8% 0.0
Jul-1997Jul-1998Jul-1999Jul-2000Jul-2001Jul-2002Jul-2003Jul-2004Jul-2005Jul-2006Jul-2007Jul-2008Jul-2009Jul-2010Jul-2011Jul-2012Jul-2013Jul-2014Jul-2015Jul-2016Jul-2017Jul-2018Jul-2019Jul-2020 Daily Flow Dry weather flow design ADWF Linear (Daily Flow) Linear (Dry weather flow)
SIMONS TOWN WWTW: ORGANIC LOAD 30,000
27,000
24,000
21,000
18,000
15,000 y = 41.981x - 42659 12,000
9,000 Population Equivalents 6,000
ANNUAL RATE OF GROWTH: 3,000 total load = 6.9%
0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Population Equivalents design organic load Linear (Population Equivalents) CATCHMENT 1
y = 0.8889x - 1034.7y = 0.8008x - 931.86 CATCHMENT 1: TOTAL FLOW Bellville, Kraaifontein, Scottsdene & Fisantekraal 130 120 Fisantekraal - 110 20Ml/d 100 90 80 70 Kraaifontein Ml/d 60 extension 50 40 30 ANNUAL RATE OF GROWTH: 20 total flow = 4.7% dry weather flow = 4.0% 10 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Daily flow Dry weather flow design ADWF Linear (Daily flow) Linear (Dry weather flow)
CATCHMENT 1: TOTAL ORGANIC LOAD Bellville, Kraaifontein, Scottsdene & Fisantekraal 1,300,000 1,200,000 1,100,000 1,000,000 900,000 800,000 700,000 600,000 500,000 400,000
population equivalents 300,000 y = 783x - 864,280 200,000 ANNUAL RATE OF GROWTH: 100,000 total load = 4.5% 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
population equivalents design organic load Linear (population equivalents) CATCHMENT 2 CATCHMENT 2: TOTAL FLOW Athlone, Cape Flats, Borcherds Quarry & Parow 450
400
350
300
y = -0.4021x + 758.76 250
Ml/d 200
150 y = -0.3692x + 693.51 100 RATE OF GROWTH: annual flow = -1.5% 50 dry weather flow = -1.8%
0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Daily Flow Dry weather flow design ADWF CWC proj.1 Linear (Daily Flow) Linear (Dry weather flow)
CATCHMENT 2: TOTAL ORGANIC LOAD Athlone, Cape Flats, Borcherds Quarry & Parow 3,000,000
2,750,000
2,500,000
2,250,000
2,000,000
1,750,000
1,500,000
1,250,000 y = -826x + 3,073,339 1,000,000 population equivalents (p.e.) 750,000
500,000 ANNUAL RATE OF GROWTH: total load = 0.3% 250,000
0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
design organic load population equivalents Linear (population equivalents) CATCHMENT 3
CATCHMENT 3: TOTAL FLOW Mitchells Plain, Macassar, Zandvliet & Gordon's Bay
200
y = 0.1673x - 87.271
150 y = 0.1896x - 116.54
Ml/d 100
50 ANNUAL RATE OF GROWTH: total flow = 1.9% dry weather flow = 2.2% 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Daily flow Dry weather flow design ADWF Linear (Daily flow) Linear (Dry weather flow)
CATCHMENT 3: TOTAL ORGANIC LOAD Mitchells Plain, Macassar, Zandvliet & Gordon's Bay 1,600,000 1,500,000 y = 2,762x - 2,532,832 1,400,000 1,300,000 1,200,000 1,100,000 1,000,000 900,000 800,000 700,000 600,000 500,000 Population Equivalents 400,000 300,000 ANNUAL RATE OF GROWTH: 200,000 total load = 4.4% 100,000 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Population Equivalents design organic load Linear (Population Equivalents) CATCHMENT 4:
CATCHMENT 4: TOTAL FLOW Potsdam, Melkbosstrand & Wesfleur 120 110 100 90 80 y = 0.1241x - 107.9 70 60 Ml/d 50 y = 0.1186x - 102.89 40 30 20 ANNUAL RATE OF GROWTH: total flow = 4.3% 10 dry weather flow = 4.4% 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
design ADWF Daily Flow CWC proj.1 Dry weather flow Linear (Daily Flow) Linear (Dry weather flow)
CATCHMENT 4: TOTAL ORGANIC LOAD Potsdam, Melkbosstrand & Wesfleur 800,000
700,000
600,000 y = 1,736x - 1,695,349 500,000
400,000
300,000
200,000
100,000 ANNUAL RATE OF GROWTH: total load = 5.0% 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
design organic load Population Equivalents Linear (Population Equivalents) CATCHMENT 5
CATCHMENT 5: TOTAL FLOW Simons Town & Wildevoelvlei
40
35
30
y = 0.0399x - 38.773 25
20 Ml/d
15 y = 0.035x - 33.389 10
ANNUAL RATE OF GROWTH: 5 total flow = 1.8% dry weather flow = 1.3%
0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Daily flow Dry weather flow design ADWF Linear (Daily flow) Linear (Dry weather flow)
CATCHMENT 5: ORGANIC LOAD Simons Town & Wildevoelvlei 250,000
225,000
200,000
y = 707x - 799,510 175,000
150,000
125,000
100,000
75,000 Population Equivalents 50,000 ANNUAL RATE OF GROWTH: 25,000 total load = 5.2%
0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Population Equivalents design organic load Linear (Population Equivalents) CATCHMENT 6
CATCHMENT 6: TOTAL FLOW Llandudno & Sea Outfalls 50
45
40
35 y = -0.0127x + 48.005
30
25 Ml/d 20 y = -0.0307x + 68.93
15
10 ANNUAL RATE OF GROWTH: 5 total flow = -0.2% dry weather flow = -1.2% 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Daily flow Dry weather flow design AWDF
Linear (Daily flow) Linear (Dry weather flow)
CATCHMENT 6: TOTAL ORGANIC LOAD Llandudno & Sea Outfalls 400,000
350,000
y = 278.17x - 131310 300,000
250,000
200,000
150,000
Population Equivalents 100,000
50,000 ANNUAL RATE OF GROWTH: total load = 1.8% 0 Jan-1998 Jan-1999 Jan-2000 Jan-2001 Jan-2002 Jan-2003 Jan-2004 Jan-2005 Jan-2006 Jan-2007 Jan-2008 Jan-2009 Jan-2010 Jan-2011 Jan-2012 Jan-2013 Jan-2014 Jan-2015 Jan-2016 Jan-2017 Jan-2018 Jan-2019 Jan-2020
design organic load Population Equivalents Linear (Population Equivalents) WESFLEUR DOMESTIC WASTEWATER TREATMENT WORKS
WESFLEUR DOMESTIC WWTW: FLOW
9.0
8.0
y = 0.0003x + 5.513 7.0
6.0
5.0 y = -0.001x + 7.0961
Ml/d 4.0
3.0
2.0
1.0 ANNUAL RATE OF GROWTH: total flow = 0.2% dry weather flow = 0.2% 0.0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Daily Flow Dry weather flow design ADWF Linear (Daily Flow) Linear (Dry weather flow)
WESFLEUR DOMESTIC WWTW: ORGANIC LOAD 100,000 y = 24.549x + 14174 90,000
80,000
70,000
60,000
50,000
40,000
30,000 Population Equivalents
20,000
10,000 ANNUAL RATE OF GROWTH: total load = 0.7% 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Population Equivalents design organic load Linear (Population Equivalents) WESFLEUR INDUSTRIAL WASTEWATER TREATMENT WORKS
WESFLEUR INDUSTRIAL WWTW: FLOW 12.0
11.0 Step increase in flow from one dyehouse has skewed 10.0 projections based on flows since July 1997, hence flows 9.0 from Nov 2000 only 8.0 considered
7.0 y = 0.0134x - 11.623
6.0 Ml/d 5.0
4.0 y = 0.006x - 2.8969 3.0
2.0 ANNUAL RATE OF GROWTH: 1.0 total flow = 9.6% dry weather flow = 6.7% 0.0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Daily Flow Dry weather flow design ADWF Linear (Daily Flow) Linear (Dry weather flow)
WESFLEUR INDUSTRIAL WWTW: ORGANIC LOAD 130,000
120,000
110,000
100,000
90,000
80,000
70,000
60,000 y = 44.64x + 13368
50,000
40,000
30,000 Population Equivalents
20,000 Step increase in flow from one dyehouse has skewed 10,000 projections based on flows since July 1997, hence flows from ANNUAL RATE OF GROWTH: Nov 2000 only considered total load = 4.5% 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Population Equivalents design organic load Linear (Population Equivalents) WILDEVOELVLEI WASTEWATER TREATMENT WORKS
WILDEVOELVLEI WWTW: FLOW
24
22
20
y = 0.0333x - 32.448 18
16
14
12 y = 0.0296x - 28.357 Ml/d 10
8
6
4 ANNUAL RATE OF GROWTH: total flow = 5.6% 2 dry weather flow = 4.5%
0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020 Daily Flow Dry weather flow design ADWF Linear (Daily Flow) Linear (Dry weather flow)
WILDEVOELVLEI WWTW: ORGANIC LOAD 170,000 160,000 150,000 y = 664.95x - 756851 140,000 130,000 120,000 110,000 100,000 90,000 80,000 70,000 60,000 50,000
Population Equivalents 40,000 30,000 20,000 ANNUAL RATE OF GROWTH: total load = 25.1% 10,000 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Population Equivalents design organic load Linear (Population Equivalents) ZANDVLIET WASTEWATER TREATMENT WORKS
ZANDVLIET WWTW: FLOW 100
90
80
70
y = 0.001x + 46.386 60
50
Ml/d y = 0.0313x + 10.154 40
30
20 ANNUAL RATE OF GROWTH: 10 total flow = -0.7% dry weather flow = 0.2% 0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
Daily Flow Dry weather flow CWC proj.1 Hyd Cap Linear (Daily Flow) Linear (Dry weather flow)
ZANDVLIET WWTW: ORGANIC LOAD y = 742.72x - 630043 550,000
500,000
450,000
400,000
350,000
300,000
250,000
200,000
150,000 Population Equivalents
100,000 ANNUAL RATE OF GROWTH: 50,000 total load = 2.7%
0 Jul-1997 Jul-1998 Jul-1999 Jul-2000 Jul-2001 Jul-2002 Jul-2003 Jul-2004 Jul-2005 Jul-2006 Jul-2007 Jul-2008 Jul-2009 Jul-2010 Jul-2011 Jul-2012 Jul-2013 Jul-2014 Jul-2015 Jul-2016 Jul-2017 Jul-2018 Jul-2019 Jul-2020
design organic load Population Equivalents Linear (Population Equivalents)