46
APPENDIX C CCT WWTW Current and Projected Return Flows
APPENDIX C
CCT WWTW
Current and Projected Return Flows
ORGANIC LOAD HANDLED BY ALL TREATMENT WORKS
y = 2,633x + 865,962
300,000
325,000
350,000
375,000
400,000
425,000
450,000
475,000
500,000
525,000
550,000
Jul-9
7Oct-
97Ja
n-98Ap
r-98Ju
l-98Oct-
98Ja
n-99Ap
r-99Ju
l-99Oct-
99Ja
n-00Ap
r-00Ju
l-00Oct-
00Ja
n-01Ap
r-01Ju
l-01Oct-
01Ja
n-02Ap
r-02Ju
l-02Oct-
02Ja
n-03Ap
r-03Ju
l-03Oct-
03Ja
n-04Ap
r-04Ju
l-04Oct-
04Ja
n-05Ap
r-05Ju
l-05
Kg
Ch
em O
x D
eman
d /
day
3,000,000
3,250,000
3,500,000
3,750,000
4,000,000
4,250,000
4,500,000
4,750,000
5,000,000
po
pu
lati
on
eq
uiv
alen
ts
RATE OF GROWTH = 3.3% pa
TOTAL FOR ALL WORKS
ALL WORKS: FLOW
y = 0.1084x + 404.54
y = 0.2167x + 233.46
050
100150200250300350400450500550600650700750800850
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Ml/d
Daily Flow Dry weather flow design ADWFLinear (Daily Flow) Linear (Dry weather flow)
ALL WORKS: ORGANIC LOAD
y = 2,633x + 865,962
0
500,000
1,000,000
1,500,000
2,000,000
2,500,000
3,000,000
3,500,000
4,000,000
4,500,000
5,000,000
5,500,000
6,000,000
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Po
pu
lati
on
Eq
uiv
alen
ts
Population Equivalents design organic load Linear (Population Equivalents)
ANNUAL RATE OF GROWTH:total flow = 0.7%dry weather flow = 0.7%
ANNUAL RATE OF GROWTH:total load = 3.6%
ATHLONE WASTEWATER TREATMENT WORKS
ATHLONE WWTW: FLOW
y = 0.1909x - 162.08
y = 0.1514x - 103.09
0
20
40
60
80
100
120
140
160
180Ju
l-199
7
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Ml/d
Daily flow Dry weather flow Hyd Cap
CWC proj.1 Linear (Dry weather flow) Linear (Daily flow)
ANNUAL RATE OF GROWTH:total flow = 4.2%dry weather flow = 5.6%
ATHLONE WWTW: ORGANIC LOAD
y = 827x - 374,961
0
150,000
300,000
450,000
600,000
750,000
900,000
1,050,000
1,200,000
1,350,000
1,500,000
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Po
pu
lati
on
Eq
uiv
alen
ts
design organic load Population Equivalents Linear (Population Equivalents)
ANNUAL RATE OF GROWTH:total load = 3.1%
Flow bypassed to Cape Flats
Flow bypassed to Cape Flats
BELLVILLE WASTEWATER TREATMENT WORKS
BELLVILLE WWTW: FLOW
0
10
20
30
40
50
60
70
80
90Ju
l-199
7
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Ml/d
Ml/d Rated Hyd Cap Linear (Ml/d)
BELLVILLE WWTW: ORGANIC LOAD
0
50,000
100,000
150,000
200,000
250,000
300,000
350,000
400,000
450,000
500,000
550,000
600,000
650,000
700,000
750,000
800,000
850,000
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Po
pu
lati
on
Eq
uiv
alen
ts
Design Organic Load Population Equivalents Linear (Population Equivalents)
ANNUAL RATE OF GROWTH:total load = 3.3%
PST's added
25 Ml/d extension to handle flow from Bottelary Area
Some flow diverted to Kraaifontein in this period
66
BORCHERDS QUARRY WASTEWATER TREATMENT WORKS
BORCHERDS QUARRY WWTW: FLOWy = 0.0733x - 62.292
y = 0.0741x - 63.416
0
5
10
15
20
25
30
35
40
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Ml/d
Daily Flow Dry weather flow Design ADWF
CWC proj.1 Linear (Daily Flow) Linear (Dry weather flow)
ANNUAL RATE OF GROWTH:total flow = 3.1%dry weather flow = 2.6%
BORCHERDS QUARRY WWTW: ORGANIC LOAD y = 630x - 457,747
0
50,000
100,000
150,000
200,000
250,000
300,000
350,000
400,000
450,000
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Po
pu
lati
on
Eq
uiv
alen
ts
Design Organic Load Population Equivalents Linear (Population Equivalents)
ANNUAL RATE OF GROWTH:total load = 1.3%
CAMPS BAY SEA OUTFALL
CAMPS BAY: FLOW
y = 0.0004x + 1.6452
y = 0.0007x + 1.1883
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0Ju
l-199
7
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Ml/d
Daily Flow Dry weather flow design ADWF
Linear (Daily Flow) Linear (Dry weather flow)
CAMPS BAY: ORGANIC LOAD
y = 43.028x - 38026
0
2,500
5,000
7,500
10,000
12,500
15,000
17,500
20,000
22,500
25,000
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Po
pu
lati
on
Eq
uiv
alen
ts
Population Equivalents Linear (Population Equivalents)
ANNUAL RATE OF GROWTH:total flow = 0.8%dry weather flow = 1.4%
ANNUAL RATE OF GROWTH:total load = 3.4%
CAPE FLATS WASTEWATER TREATMENT WORKS
CAPE FLATS WWTW: FLOW
y = -0.1687x + 355.84
y = -0.2791x + 476.66
0
25
50
75
100
125
150
175
200
225
250
275Ju
l-199
7
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Ml/d
Daily Flow Dry weather flow Design ADWF
CWC proj.1 Linear (Daily Flow) Linear (Dry weather flow)
ANNUAL RATE OF GROWTH:total flow = -1.1%dry weather flow = -2.3%
CAPE FLATS WWTW: ORGANIC LOAD
y = 1,674x - 1,006,587
0
150,000
300,000
450,000
600,000
750,000
900,000
1,050,000
1,200,000
1,350,000
1,500,000
1,650,000
1,800,000
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Po
pu
lati
on
Eq
uiv
alen
ts
Population Equivalents design organic load Linear (Population Equivalents)
ANNUAL RATE OF GROWTH:total load = 2.6%
ORGANIC LOAD HANDLED BY ALL TREATMENT WORKS
y = 2,633x + 865,962
300,000
325,000
350,000
375,000
400,000
425,000
450,000
475,000
500,000
525,000
550,000
Jul-9
7Oct-
97Ja
n-98Ap
r-98Ju
l-98Oct-
98Ja
n-99Ap
r-99Ju
l-99Oct-
99Ja
n-00Ap
r-00Ju
l-00Oct-
00Ja
n-01Ap
r-01Ju
l-01Oct-
01Ja
n-02Ap
r-02Ju
l-02Oct-
02Ja
n-03Ap
r-03Ju
l-03Oct-
03Ja
n-04Ap
r-04Ju
l-04Oct-
04Ja
n-05Ap
r-05Ju
l-05
Kg
Ch
em O
x D
eman
d /
day
3,000,000
3,250,000
3,500,000
3,750,000
4,000,000
4,250,000
4,500,000
4,750,000
5,000,000
po
pu
lati
on
eq
uiv
alen
ts
RATE OF GROWTH = 3.3% pa
TOTAL FOR ALL WORKS
ALL WORKS: FLOW
y = 0.1084x + 404.54
y = 0.2167x + 233.46
050
100150200250300350400450500550600650700750800850
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Ml/d
Daily Flow Dry weather flow design ADWFLinear (Daily Flow) Linear (Dry weather flow)
ALL WORKS: ORGANIC LOAD
y = 2,633x + 865,962
0
500,000
1,000,000
1,500,000
2,000,000
2,500,000
3,000,000
3,500,000
4,000,000
4,500,000
5,000,000
5,500,000
6,000,000
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Po
pu
lati
on
Eq
uiv
alen
ts
Population Equivalents design organic load Linear (Population Equivalents)
ANNUAL RATE OF GROWTH:total flow = 0.7%dry weather flow = 0.7%
ANNUAL RATE OF GROWTH:total load = 3.6%
ATHLONE WASTEWATER TREATMENT WORKS
ATHLONE WWTW: FLOW
y = 0.1909x - 162.08
y = 0.1514x - 103.09
0
20
40
60
80
100
120
140
160
180Ju
l-199
7
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Ml/d
Daily flow Dry weather flow Hyd Cap
CWC proj.1 Linear (Dry weather flow) Linear (Daily flow)
ANNUAL RATE OF GROWTH:total flow = 4.2%dry weather flow = 5.6%
ATHLONE WWTW: ORGANIC LOAD
y = 827x - 374,961
0
150,000
300,000
450,000
600,000
750,000
900,000
1,050,000
1,200,000
1,350,000
1,500,000
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Po
pu
lati
on
Eq
uiv
alen
ts
design organic load Population Equivalents Linear (Population Equivalents)
ANNUAL RATE OF GROWTH:total load = 3.1%
Flow bypassed to Cape Flats
Flow bypassed to Cape Flats
BELLVILLE WASTEWATER TREATMENT WORKS
BELLVILLE WWTW: FLOW
0
10
20
30
40
50
60
70
80
90Ju
l-199
7
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Ml/d
Ml/d Rated Hyd Cap Linear (Ml/d)
BELLVILLE WWTW: ORGANIC LOAD
0
50,000
100,000
150,000
200,000
250,000
300,000
350,000
400,000
450,000
500,000
550,000
600,000
650,000
700,000
750,000
800,000
850,000
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Po
pu
lati
on
Eq
uiv
alen
ts
Design Organic Load Population Equivalents Linear (Population Equivalents)
ANNUAL RATE OF GROWTH:total load = 3.3%
PST's added
25 Ml/d extension to handle flow from Bottelary Area
Some flow diverted to Kraaifontein in this period
66
BORCHERDS QUARRY WASTEWATER TREATMENT WORKS
BORCHERDS QUARRY WWTW: FLOWy = 0.0733x - 62.292
y = 0.0741x - 63.416
0
5
10
15
20
25
30
35
40
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Ml/d
Daily Flow Dry weather flow Design ADWF
CWC proj.1 Linear (Daily Flow) Linear (Dry weather flow)
ANNUAL RATE OF GROWTH:total flow = 3.1%dry weather flow = 2.6%
BORCHERDS QUARRY WWTW: ORGANIC LOAD y = 630x - 457,747
0
50,000
100,000
150,000
200,000
250,000
300,000
350,000
400,000
450,000
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Po
pu
lati
on
Eq
uiv
alen
ts
Design Organic Load Population Equivalents Linear (Population Equivalents)
ANNUAL RATE OF GROWTH:total load = 1.3%
CAMPS BAY SEA OUTFALL
CAMPS BAY: FLOW
y = 0.0004x + 1.6452
y = 0.0007x + 1.1883
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0Ju
l-199
7
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Ml/d
Daily Flow Dry weather flow design ADWF
Linear (Daily Flow) Linear (Dry weather flow)
CAMPS BAY: ORGANIC LOAD
y = 43.028x - 38026
0
2,500
5,000
7,500
10,000
12,500
15,000
17,500
20,000
22,500
25,000
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Po
pu
lati
on
Eq
uiv
alen
ts
Population Equivalents Linear (Population Equivalents)
ANNUAL RATE OF GROWTH:total flow = 0.8%dry weather flow = 1.4%
ANNUAL RATE OF GROWTH:total load = 3.4%
CAPE FLATS WASTEWATER TREATMENT WORKS
CAPE FLATS WWTW: FLOW
y = -0.1687x + 355.84
y = -0.2791x + 476.66
0
25
50
75
100
125
150
175
200
225
250
275Ju
l-199
7
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Ml/d
Daily Flow Dry weather flow Design ADWF
CWC proj.1 Linear (Daily Flow) Linear (Dry weather flow)
ANNUAL RATE OF GROWTH:total flow = -1.1%dry weather flow = -2.3%
CAPE FLATS WWTW: ORGANIC LOAD
y = 1,674x - 1,006,587
0
150,000
300,000
450,000
600,000
750,000
900,000
1,050,000
1,200,000
1,350,000
1,500,000
1,650,000
1,800,000
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Po
pu
lati
on
Eq
uiv
alen
ts
Population Equivalents design organic load Linear (Population Equivalents)
ANNUAL RATE OF GROWTH:total load = 2.6%
GORDONS BAY WASTEWATER TREATMENT WORKS
GORDON'S BAY WWTW: FLOW
y = 0.0101x - 9.9521
y = 0.0077x - 7.2896
0
1
2
3
4
5
6
7
8
9
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Ml/d
Daily Flow Dry weather flow Design ADWFCWC proj.1 Linear (Daily Flow) Linear (Dry weather flow)
GORDON'S BAY WWTW: ORGANIC LOAD
y = 81.307x - 86887
0
5,000
10,000
15,000
20,000
25,000
30,000
35,000
40,000
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Po
pu
lati
on
Eq
uiv
alen
ts
Population Equivalents Design Organic Load Linear (Population Equivalents)
ANNUAL RATE OF GROWTH:total load = 11.5%
ANNUAL RATE OF GROWTH:total flow = 7.5%dry weather flow = 6.3%
GREEN POINT SEA OUTFALL: FLOW & LOAD
GREEN POINT: FLOW
y = -0.0041x + 31.221
y = -0.0041x + 29.982
0
5
10
15
20
25
30
35
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Ml/d
Daily Flow Dry weather flow design ADWF
Linear (Daily Flow) Linear (Dry weather flow)
GREEN POINT: ORGANIC LOAD
y = 197.24x - 81012
0
25,000
50,000
75,000
100,000
125,000
150,000
175,000
200,000
225,000
250,000
275,000
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Po
pu
lati
on
Eq
uiv
alen
ts
Population Equivalents Linear (Population Equivalents)
ANNUAL RATE OF GROWTH:total load = 1.2%
ANNUAL RATE OF GROWTH:total flow = -0.2%dry weather flow = -0.7%
HOUT BAY SEA OUTFALL
HOUT BAY: FLOW
y = -0.0072x + 12.851
y = -0.0129x + 19.732
0
1
2
3
4
5
6
7
8
9
10
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Ml/d
Daily Flow Dry weather flow design ADWF
Linear (Daily Flow) Linear (Dry weather flow)
ANNUAL RATE OF GROWTH:total flow = -1.0%dry weather flow = -2.3%
HOUT BAY: ORGANIC LOAD
y = -16.657x + 53833
0
10,000
20,000
30,000
40,000
50,000
60,000
70,000
80,000
90,000
100,000
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
Po
pu
lati
on
Eq
uiv
alen
ts
Population Equivalents design organic load Linear (Population Equivalents)
ANNUAL RATE OF GROWTH:total load = 2.0%
KRAAIFONTEIN WASTEWATER TREATMENT WORKS
KRAAIFONTEIN WWTW: FLOW
y = 0.0442x - 47.708
y = 0.0466x - 50.034
0
2
4
6
8
10
12
14
16
18Ju
l-199
7
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Ml/d
Daily Flow Dry weather flow Design ADWFCWC estimate Linear (Dry weather flow) Linear (Daily Flow)
ANNUAL RATE OF GROWTH:total flow = 9.4%dry weather flow = 9.3%
KRAAIFONTEIN WWTW: ORGANIC LOAD
y = 358.85x - 390135
0
10,000
20,000
30,000
40,000
50,000
60,000
70,000
80,000
90,000
100,000
110,000
120,000
130,000
140,000
150,000
160,000
170,000
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Pop
ulat
ion
Equ
ival
ents
Population Equivalents design organic load Linear (Population Equivalents)
ANNUAL RATE OF GROWTH:total load = 10.1%
LLANDUDNO WASTEWATER TREATMENT WORKS
LLANDUDNO WWTW: FLOW
y = 0.0002x - 0.0924
y = 0.0003x - 0.1929
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0.45
0.50
0.55
0.60Ju
l-199
7
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
ML
/d
Daily Flow Dry weather flow design ADWF
Linear (Daily Flow) Linear (Dry weather flow)
LLANDUDNO WWTW: ORGANIC LOAD
y = 1.1204x - 182.85
0
400
800
1,200
1,600
2,000
2,400
2,800
3,200
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
Po
pu
lati
on
Eq
uiv
alen
ts
Population Equivalents design organic load Linear (Population Equivalents)
ANNUAL RATE OF GROWTH:total load = 2.0%
ANNUAL RATE OF GROWTH:total flow = 3.0%dry weather flow = 4.1%
MACASSAR WASTEWATER TREATMENT WORKS
MACASSAR WWTW: FLOW
y = 0.1219x - 112.75
y = 0.1131x - 104.77
0.0
5.0
10.0
15.0
20.0
25.0
30.0
35.0
40.0
45.0
50.0
55.0
60.0
65.0
70.0
75.0
80.0Ju
l-199
7
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Ml/d
Daily Flow Dry weather flow Design ADWF
CWC proj.1 Linear (Daily Flow) Linear (Dry weather flow)
MACASSAR WWTW: ORGANIC LOAD
y = 798.2x - 783937
0
50,000
100,000
150,000
200,000
250,000
300,000
350,000
400,000
450,000
500,000
550,000
Jul-9
7
Jul-9
8
Jul-9
9
Jul-0
0
Jul-0
1
Jul-0
2
Jul-0
3
Jul-0
4
Jul-0
5
Jul-0
6
Jul-0
7
Jul-0
8
Jul-0
9
Jul-1
0
Jul-1
1
Jul-1
2
Jul-1
3
Jul-1
4
Jul-1
5
Jul-1
6
Jul-1
7
Jul-1
8
Jul-1
9
Jul-2
0
Po
pu
lati
on
Eq
uiv
alen
ts
Population Equivalents Design Organic Load Linear (Population Equivalents)
2 addn. SST's commissioned
20Ml/d extension commissioned
ANNUAL RATE OF GROWTH:total flow = 5.4%dry weather flow = 6.0%
ANNUAL RATE OF GROWTH:total load = 6.5%
MELKBOSSTRAND WASTEWATER TREATMENT WORKS
MELKBOSSTRAND WWTW: FLOW
y = 0.0118x - 12.47
y = 0.0115x - 12.257
0
3
6
9
12
15
18
21
24
27
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Ml/d
Daily Flow design ADWF CIVtech
Dry weather flow Linear (Daily Flow) Linear (Dry weather flow)
MELKBOSSTRAND WWTW: ORGANIC LOAD
y = 69.031x - 76029
0
12,500
25,000
37,500
50,000
62,500
75,000
87,500
100,000
112,500
125,000
137,500
150,000
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Po
pu
lati
on
Eq
uiv
alen
ts
Population Equivalents design organic load Linear (Population Equivalents)
ANNUAL RATE OF GROWTH EXCLUDES FLOW DIVERTED FROM TABLEVIEW AREA
20Ml/d extensions commissioned
ANNUAL RATE OF GROWTH:total flow = 8.7%dry weather flow = 7.2%
ANNUAL RATE OF GROWTH EXCLUDES FLOW DIVERTED FROM TABLEVIEW AREA
ANNUAL RATE OF GROWTH:total load = 8.6%
MITCHELLS PLAIN WASTEWATER TREATMENT WORKS
MITCHELLS PLAIN WWTW: ORGANIC LOAD
y = 1,140x - 1,031,966
0
50,000
100,000
150,000
200,000
250,000
300,000
350,000
400,000
450,000
500,000
550,000
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Population Equivalents design organic load Linear (Population Equivalents)
MITCHELLS PLAIN WWTW: FLOW
y = 0.0198x + 6.5067
y = 0.0184x + 8.2804
0
5
10
15
20
25
30
35
40
45
Jul-19
97
Jul-19
99
Jul-20
01
Jul-20
03
Jul-20
05
Jul-20
07
Jul-20
09
Jul-20
11
Jul-20
13
Jul-20
15
Jul-20
17
Jul-20
19
Ml/
d
Daily Flow Dry weather flow design ADWF
Linear (Daily Flow) Linear (Dry weather flow)
ANNUAL RATE OF GROWTH:total flow = 0.7%dry weather flow = 0.5%
ANNUAL RATE OF GROWTH:total load = 3.1%
GORDONS BAY WASTEWATER TREATMENT WORKS
GORDON'S BAY WWTW: FLOW
y = 0.0101x - 9.9521
y = 0.0077x - 7.2896
0
1
2
3
4
5
6
7
8
9
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Ml/d
Daily Flow Dry weather flow Design ADWFCWC proj.1 Linear (Daily Flow) Linear (Dry weather flow)
GORDON'S BAY WWTW: ORGANIC LOAD
y = 81.307x - 86887
0
5,000
10,000
15,000
20,000
25,000
30,000
35,000
40,000
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Po
pu
lati
on
Eq
uiv
alen
ts
Population Equivalents Design Organic Load Linear (Population Equivalents)
ANNUAL RATE OF GROWTH:total load = 11.5%
ANNUAL RATE OF GROWTH:total flow = 7.5%dry weather flow = 6.3%
GREEN POINT SEA OUTFALL: FLOW & LOAD
GREEN POINT: FLOW
y = -0.0041x + 31.221
y = -0.0041x + 29.982
0
5
10
15
20
25
30
35
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Ml/d
Daily Flow Dry weather flow design ADWF
Linear (Daily Flow) Linear (Dry weather flow)
GREEN POINT: ORGANIC LOAD
y = 197.24x - 81012
0
25,000
50,000
75,000
100,000
125,000
150,000
175,000
200,000
225,000
250,000
275,000
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Po
pu
lati
on
Eq
uiv
alen
ts
Population Equivalents Linear (Population Equivalents)
ANNUAL RATE OF GROWTH:total load = 1.2%
ANNUAL RATE OF GROWTH:total flow = -0.2%dry weather flow = -0.7%
HOUT BAY SEA OUTFALL
HOUT BAY: FLOW
y = -0.0072x + 12.851
y = -0.0129x + 19.732
0
1
2
3
4
5
6
7
8
9
10
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Ml/d
Daily Flow Dry weather flow design ADWF
Linear (Daily Flow) Linear (Dry weather flow)
ANNUAL RATE OF GROWTH:total flow = -1.0%dry weather flow = -2.3%
HOUT BAY: ORGANIC LOAD
y = -16.657x + 53833
0
10,000
20,000
30,000
40,000
50,000
60,000
70,000
80,000
90,000
100,000
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
Po
pu
lati
on
Eq
uiv
alen
ts
Population Equivalents design organic load Linear (Population Equivalents)
ANNUAL RATE OF GROWTH:total load = 2.0%
KRAAIFONTEIN WASTEWATER TREATMENT WORKS
KRAAIFONTEIN WWTW: FLOW
y = 0.0442x - 47.708
y = 0.0466x - 50.034
0
2
4
6
8
10
12
14
16
18Ju
l-199
7
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Ml/d
Daily Flow Dry weather flow Design ADWFCWC estimate Linear (Dry weather flow) Linear (Daily Flow)
ANNUAL RATE OF GROWTH:total flow = 9.4%dry weather flow = 9.3%
KRAAIFONTEIN WWTW: ORGANIC LOAD
y = 358.85x - 390135
0
10,000
20,000
30,000
40,000
50,000
60,000
70,000
80,000
90,000
100,000
110,000
120,000
130,000
140,000
150,000
160,000
170,000
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Pop
ulat
ion
Equ
ival
ents
Population Equivalents design organic load Linear (Population Equivalents)
ANNUAL RATE OF GROWTH:total load = 10.1%
LLANDUDNO WASTEWATER TREATMENT WORKS
LLANDUDNO WWTW: FLOW
y = 0.0002x - 0.0924
y = 0.0003x - 0.1929
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0.45
0.50
0.55
0.60Ju
l-199
7
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
ML
/d
Daily Flow Dry weather flow design ADWF
Linear (Daily Flow) Linear (Dry weather flow)
LLANDUDNO WWTW: ORGANIC LOAD
y = 1.1204x - 182.85
0
400
800
1,200
1,600
2,000
2,400
2,800
3,200
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
Po
pu
lati
on
Eq
uiv
alen
ts
Population Equivalents design organic load Linear (Population Equivalents)
ANNUAL RATE OF GROWTH:total load = 2.0%
ANNUAL RATE OF GROWTH:total flow = 3.0%dry weather flow = 4.1%
MACASSAR WASTEWATER TREATMENT WORKS
MACASSAR WWTW: FLOW
y = 0.1219x - 112.75
y = 0.1131x - 104.77
0.0
5.0
10.0
15.0
20.0
25.0
30.0
35.0
40.0
45.0
50.0
55.0
60.0
65.0
70.0
75.0
80.0Ju
l-199
7
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Ml/d
Daily Flow Dry weather flow Design ADWF
CWC proj.1 Linear (Daily Flow) Linear (Dry weather flow)
MACASSAR WWTW: ORGANIC LOAD
y = 798.2x - 783937
0
50,000
100,000
150,000
200,000
250,000
300,000
350,000
400,000
450,000
500,000
550,000
Jul-9
7
Jul-9
8
Jul-9
9
Jul-0
0
Jul-0
1
Jul-0
2
Jul-0
3
Jul-0
4
Jul-0
5
Jul-0
6
Jul-0
7
Jul-0
8
Jul-0
9
Jul-1
0
Jul-1
1
Jul-1
2
Jul-1
3
Jul-1
4
Jul-1
5
Jul-1
6
Jul-1
7
Jul-1
8
Jul-1
9
Jul-2
0
Po
pu
lati
on
Eq
uiv
alen
ts
Population Equivalents Design Organic Load Linear (Population Equivalents)
2 addn. SST's commissioned
20Ml/d extension commissioned
ANNUAL RATE OF GROWTH:total flow = 5.4%dry weather flow = 6.0%
ANNUAL RATE OF GROWTH:total load = 6.5%
MELKBOSSTRAND WASTEWATER TREATMENT WORKS
MELKBOSSTRAND WWTW: FLOW
y = 0.0118x - 12.47
y = 0.0115x - 12.257
0
3
6
9
12
15
18
21
24
27
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Ml/d
Daily Flow design ADWF CIVtech
Dry weather flow Linear (Daily Flow) Linear (Dry weather flow)
MELKBOSSTRAND WWTW: ORGANIC LOAD
y = 69.031x - 76029
0
12,500
25,000
37,500
50,000
62,500
75,000
87,500
100,000
112,500
125,000
137,500
150,000
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Po
pu
lati
on
Eq
uiv
alen
ts
Population Equivalents design organic load Linear (Population Equivalents)
ANNUAL RATE OF GROWTH EXCLUDES FLOW DIVERTED FROM TABLEVIEW AREA
20Ml/d extensions commissioned
ANNUAL RATE OF GROWTH:total flow = 8.7%dry weather flow = 7.2%
ANNUAL RATE OF GROWTH EXCLUDES FLOW DIVERTED FROM TABLEVIEW AREA
ANNUAL RATE OF GROWTH:total load = 8.6%
MITCHELLS PLAIN WASTEWATER TREATMENT WORKS
MITCHELLS PLAIN WWTW: ORGANIC LOAD
y = 1,140x - 1,031,966
0
50,000
100,000
150,000
200,000
250,000
300,000
350,000
400,000
450,000
500,000
550,000
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Population Equivalents design organic load Linear (Population Equivalents)
MITCHELLS PLAIN WWTW: FLOW
y = 0.0198x + 6.5067
y = 0.0184x + 8.2804
0
5
10
15
20
25
30
35
40
45
Jul-19
97
Jul-19
99
Jul-20
01
Jul-20
03
Jul-20
05
Jul-20
07
Jul-20
09
Jul-20
11
Jul-20
13
Jul-20
15
Jul-20
17
Jul-20
19
Ml/
d
Daily Flow Dry weather flow design ADWF
Linear (Daily Flow) Linear (Dry weather flow)
ANNUAL RATE OF GROWTH:total flow = 0.7%dry weather flow = 0.5%
ANNUAL RATE OF GROWTH:total load = 3.1%
PAROW WASTEWATER TREATMENT WORKS
PAROW WWTW: FLOW
y = 0.0057x - 5.3408
y = 0.0029x - 1.9219
0.0
0.5
1.0
1.5
2.0
2.5
3.0
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Ml/d
Daily Flow Dry weather flow design ADWF
CWC proj.1 Linear (Daily Flow) Linear (Dry weather flow)
RATE OF GROWTH:annual flow = 7.7%dry weather flow = 6.6%
PAROW WWTW: ORGANIC LOAD
y = 49.238x - 50731
0
2,000
4,000
6,000
8,000
10,000
12,000
14,000
16,000
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Po
pu
lati
on
Eq
uiv
alen
ts
Population Equivalents design organic load Linear (Population Equivalents)
ANNUAL RATE OF GROWTH:total load = 9.4%
Flow restricted from now on
POTSDAM WASTEWATER TREATMENT WORKS
POTSDAM WWTW: FLOW
y = 0.0981x - 88.881y = 0.0993x - 91.649
0
5
10
15
20
25
30
35
40
45
50
55
60
65Ju
l-199
7
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Ml/d
Daily Flow Dry weather flowdesign ADWF 1997 Strategic Study projectionCIVtech Linear (Daily Flow)Linear (Dry weather flow)
POTSDAM WWTW: ORGANIC LOAD
y = 1,172x - 1,117,322
0
50,000
100,000
150,000
200,000
250,000
300,000
350,000
400,000
450,000
500,000
550,000
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Po
pu
lati
on
Eq
uiv
alen
ts
Population Equivalents design organic load Linear (Population Equivalents)
Excess flow diverted to Melkbos WWTW
ANNUAL RATE OF GROWTH:total flow = 5.2%dry weather flow = 5.8%
ANNUAL RATE OF GROWTH:total load = 3.9%
POTSDAM WWTW: FLOW/ CAPACITY
05
101520253035404550556065
Jul-9
7
Jan-
98
Jul-9
8
Jan-
99
Jul-9
9
Jan-
00
Jul-0
0
Jan-
01
Jul-0
1
Jan-
02
Jul-0
2
Jan-
03
Jul-0
3
Jan-
04
Jul-0
4
Jan-
05
Jul-0
5
Jan-
06
Jul-0
6
Jan-
07
Jul-0
7
Ml/d
Design Treatment CapacityDaily Flow1997 Strategic Study projectionEstimated developmental impacts over next 3 yearsFlocculant Chemical addition (Temporary)
FORMAL CAPACITY EXTENSION
SCOTTSDENE WASTEWATER TREATMENT WORKS
SCOTTSDENE WWTW: FLOW
y = 0.0481x - 51.616y = 0.0431x - 45.744
0
2
4
6
8
10
12
14
16
18
20Ju
l-199
7
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Ml/d
Daily Flow Dry weather flow design ADWF
divert to or from Linear (Daily Flow) Linear (Dry weather flow)
ANNUAL RATE OF GROWTH:total flow = 12.7%dry weather flow = 12.4%
SCOTTSDENE WWTW: ORGANIC LOAD
y = 424.12x - 474145
0
10,000
20,000
30,000
40,000
50,000
60,000
70,000
80,000
90,000
100,000
110,000
120,000
130,000
140,000
150,000
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Po
pu
lati
on
Eq
uiv
alen
ts
Population Equivalents design organic load Linear (Population Equivalents)
ANNUAL RATE OF GROWTH:total load = 15.2%
SIMONS TOWN WASTEWATER TREATMENT WORKS
SIMONS TOWN WWTW: FLOW
y = 0.0049x - 4.2549
y = 0.0034x - 2.5987
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
Jul-19
97
Jul-19
98
Jul-19
99
Jul-20
00
Jul-20
01
Jul-20
02
Jul-20
03
Jul-20
04
Jul-20
05
Jul-20
06
Jul-20
07
Jul-20
08
Jul-20
09
Jul-20
10
Jul-20
11
Jul-20
12
Jul-20
13
Jul-20
14
Jul-20
15
Jul-20
16
Jul-20
17
Jul-20
18
Jul-20
19
Jul-20
20
Ml/d
Daily Flow Dry weather flow design ADWF
Linear (Daily Flow) Linear (Dry weather flow)
SIMONS TOWN WWTW: ORGANIC LOAD
y = 41.981x - 42659
0
3,000
6,000
9,000
12,000
15,000
18,000
21,000
24,000
27,000
30,000
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Po
pu
lati
on
Eq
uiv
alen
ts
Population Equivalents design organic load Linear (Population Equivalents)
ANNUAL RATE OF GROWTH:total flow = 4.1%dry weather flow = 2.8%
ANNUAL RATE OF GROWTH:total load = 6.9%
CATCHMENT 1
CATCHMENT 1: TOTAL FLOW
Bellville, Kraaifontein, Scottsdene & Fisantekraal
y = 0.8889x - 1034.7y = 0.8008x - 931.86
0
10
20
30
40
50
60
70
80
90
100
110
120
130
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Ml/d
Daily flow Dry weather flow design ADWF
Linear (Daily flow) Linear (Dry weather flow)
Fisantekraal - 20Ml/d
Kraaifontein extension
ANNUAL RATE OF GROWTH:total flow = 4.7%dry weather flow = 4.0%
CATCHMENT 1: TOTAL ORGANIC LOADBellville, Kraaifontein, Scottsdene & Fisantekraal
y = 783x - 864,280
0
100,000
200,000
300,000
400,000
500,000
600,000
700,000
800,000
900,000
1,000,000
1,100,000
1,200,000
1,300,000
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
po
pu
lati
on
eq
uiv
alen
ts
population equivalents design organic load Linear (population equivalents)
ANNUAL RATE OF GROWTH:total load = 4.5%
CATCHMENT 2
CATCHMENT 2: TOTAL ORGANIC LOADAthlone, Cape Flats, Borcherds Quarry & Parow
y = -826x + 3,073,339
0
250,000
500,000
750,000
1,000,000
1,250,000
1,500,000
1,750,000
2,000,000
2,250,000
2,500,000
2,750,000
3,000,000
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
popu
latio
n eq
uiva
lent
s (p
.e.)
design organic load population equivalents Linear (population equivalents)
ANNUAL RATE OF GROWTH:total load = 0.3%
CATCHMENT 2: TOTAL FLOWAthlone, Cape Flats, Borcherds Quarry & Parow
y = -0.4021x + 758.76
y = -0.3692x + 693.51
0
50
100
150
200
250
300
350
400
450Ju
l-199
7
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Ml/d
Daily Flow Dry weather flow design ADWF
CWC proj.1 Linear (Daily Flow) Linear (Dry weather flow)
RATE OF GROWTH:annual flow = -1.5%dry weather flow = -1.8%
CATCHMENT 3
CATCHMENT 3: TOTAL FLOW
Mitchells Plain, Macassar, Zandvliet & Gordon's Bay
y = 0.1673x - 87.271
y = 0.1896x - 116.54
0
50
100
150
200
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Ml/d
Daily flow Dry weather flow design ADWF
Linear (Daily flow) Linear (Dry weather flow)
CATCHMENT 3: TOTAL ORGANIC LOADMitchells Plain, Macassar, Zandvliet & Gordon's Bay
y = 2,762x - 2,532,832
0
100,000
200,000
300,000
400,000
500,000
600,000
700,000
800,000
900,000
1,000,000
1,100,000
1,200,000
1,300,000
1,400,000
1,500,000
1,600,000
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Pop
ulat
ion
Equ
ival
ents
Population Equivalents design organic load Linear (Population Equivalents)
ANNUAL RATE OF GROWTH:total load = 4.4%
ANNUAL RATE OF GROWTH:total flow = 1.9%dry weather flow = 2.2%
CATCHMENT 4:
CATCHMENT 4: TOTAL FLOWPotsdam, Melkbosstrand & Wesfleur
y = 0.1241x - 107.9
y = 0.1186x - 102.89
0
10
20
30
40
50
60
70
80
90
100
110
120
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Ml/d
design ADWF Daily Flow CWC proj.1Dry weather flow Linear (Daily Flow) Linear (Dry weather flow)
CATCHMENT 4: TOTAL ORGANIC LOADPotsdam, Melkbosstrand & Wesfleur
y = 1,736x - 1,695,349
0
100,000
200,000
300,000
400,000
500,000
600,000
700,000
800,000
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
design organic load Population Equivalents Linear (Population Equivalents)
ANNUAL RATE OF GROWTH:total flow = 4.3%dry weather flow = 4.4%
ANNUAL RATE OF GROWTH:total load = 5.0%
CATCHMENT 5
CATCHMENT 5: TOTAL FLOW Simons Town & Wildevoelvlei
y = 0.0399x - 38.773
y = 0.035x - 33.389
0
5
10
15
20
25
30
35
40Ju
l-199
7
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Ml/d
Daily flow Dry weather flow design ADWF
Linear (Daily flow) Linear (Dry weather flow)
ANNUAL RATE OF GROWTH:total flow = 1.8%dry weather flow = 1.3%
CATCHMENT 5: ORGANIC LOADSimons Town & Wildevoelvlei
y = 707x - 799,510
0
25,000
50,000
75,000
100,000
125,000
150,000
175,000
200,000
225,000
250,000
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Po
pu
lati
on
Eq
uiv
alen
ts
Population Equivalents design organic load Linear (Population Equivalents)
ANNUAL RATE OF GROWTH:total load = 5.2%
CATCHMENT 6
CATCHMENT 6: TOTAL FLOWLlandudno & Sea Outfalls
y = -0.0127x + 48.005
y = -0.0307x + 68.93
0
5
10
15
20
25
30
35
40
45
50
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Ml/d
Daily flow Dry weather flow design AWDF
Linear (Daily flow) Linear (Dry weather flow)
CATCHMENT 6: TOTAL ORGANIC LOADLlandudno & Sea Outfalls
y = 278.17x - 131310
0
50,000
100,000
150,000
200,000
250,000
300,000
350,000
400,000
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
Po
pu
lati
on
Eq
uiv
alen
ts
design organic load Population Equivalents Linear (Population Equivalents)
ANNUAL RATE OF GROWTH:total flow = -0.2%dry weather flow = -1.2%
ANNUAL RATE OF GROWTH:total load = 1.8%
WESFLEUR DOMESTIC WASTEWATER TREATMENT WORKS
WESFLEUR DOMESTIC WWTW: FLOW
y = 0.0003x + 5.513
y = -0.001x + 7.0961
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0Ju
l-199
7
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Ml/d
Daily Flow Dry weather flow design ADWF
Linear (Daily Flow) Linear (Dry weather flow)
WESFLEUR DOMESTIC WWTW: ORGANIC LOAD
y = 24.549x + 14174
0
10,000
20,000
30,000
40,000
50,000
60,000
70,000
80,000
90,000
100,000
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Po
pu
lati
on
Eq
uiv
alen
ts
Population Equivalents design organic load Linear (Population Equivalents)
ANNUAL RATE OF GROWTH:total flow = 0.2%dry weather flow = 0.2%
ANNUAL RATE OF GROWTH:total load = 0.7%
WESFLEUR INDUSTRIAL WASTEWATER TREATMENT WORKS
WESFLEUR INDUSTRIAL WWTW: FLOW
y = 0.0134x - 11.623
y = 0.006x - 2.8969
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
11.0
12.0Ju
l-199
7
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Ml/d
Daily Flow Dry weather flow design ADWF
Linear (Daily Flow) Linear (Dry weather flow)
Step increase in flow from one dyehouse has skewed projections based on flows since July 1997, hence flows from Nov 2000 only considered
WESFLEUR INDUSTRIAL WWTW: ORGANIC LOAD
y = 44.64x + 13368
0
10,000
20,000
30,000
40,000
50,000
60,000
70,000
80,000
90,000
100,000
110,000
120,000
130,000
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Po
pu
lati
on
Eq
uiv
alen
ts
Population Equivalents design organic load Linear (Population Equivalents)
Step increase in flow from one dyehouse has skewed projections based on flows since July 1997, hence flows from Nov 2000 only considered
ANNUAL RATE OF GROWTH:total flow = 9.6%dry weather flow = 6.7%
ANNUAL RATE OF GROWTH:total load = 4.5%
WILDEVOELVLEI WASTEWATER TREATMENT WORKS
WILDEVOELVLEI WWTW: FLOW
y = 0.0333x - 32.448
y = 0.0296x - 28.357
0
2
4
6
8
10
12
14
16
18
20
22
24Ju
l-199
7
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Ml/d
Daily Flow Dry weather flow design ADWFLinear (Daily Flow) Linear (Dry weather flow)
WILDEVOELVLEI WWTW: ORGANIC LOAD
y = 664.95x - 756851
0
10,000
20,000
30,000
40,000
50,000
60,000
70,000
80,000
90,000
100,000
110,000
120,000
130,000
140,000
150,000
160,000
170,000
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Po
pu
lati
on
Eq
uiv
alen
ts
Population Equivalents design organic load Linear (Population Equivalents)
ANNUAL RATE OF GROWTH:total flow = 5.6%dry weather flow = 4.5%
ANNUAL RATE OF GROWTH:total load = 25.1%
ZANDVLIET WASTEWATER TREATMENT WORKS
ZANDVLIET WWTW: FLOW
y = 0.001x + 46.386
y = 0.0313x + 10.154
0
10
20
30
40
50
60
70
80
90
100Ju
l-199
7
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Ml/d
Daily Flow Dry weather flow CWC proj.1
Hyd Cap Linear (Daily Flow) Linear (Dry weather flow)
ZANDVLIET WWTW: ORGANIC LOADy = 742.72x - 630043
0
50,000
100,000
150,000
200,000
250,000
300,000
350,000
400,000
450,000
500,000
550,000
Jul-1
997
Jul-1
998
Jul-1
999
Jul-2
000
Jul-2
001
Jul-2
002
Jul-2
003
Jul-2
004
Jul-2
005
Jul-2
006
Jul-2
007
Jul-2
008
Jul-2
009
Jul-2
010
Jul-2
011
Jul-2
012
Jul-2
013
Jul-2
014
Jul-2
015
Jul-2
016
Jul-2
017
Jul-2
018
Jul-2
019
Jul-2
020
Po
pu
lati
on
Eq
uiv
alen
ts
design organic load Population Equivalents Linear (Population Equivalents)
ANNUAL RATE OF GROWTH:total flow = -0.7%dry weather flow = 0.2%
ANNUAL RATE OF GROWTH:total load = 2.7%
