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8/10/2019 Water Balance Evapo Dam Rev0
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Sishen Waste Tire Yard
Evaporation Dam
KUMBA IORN ORE - Sishen Waste Tire Yard - Volumes m³ per month
TWL Length 220 m Tire Waste Yard 42,640 Run-off Factor 100%
TWL Width 100 m Waste Tire Recycling 12,792 30% Free board 1 m
Dam Evaporation Area 22,000 m² Catchment Area 55,432
1 in 100 Year 24 hour storm event:
1:100 Year storm (mm) 119 mm Storm Capacity depth (m) 0.4 m
Volume Direct on Dam Surface 2618 m³ Average Year 0.0 m
Volume from Catchment 6596 m³ Year of 1:100y Storm 0.2 m
Storm capacity required (m3) 9,214 m³ Year following 1:100y Storm 0.0 m
Capacity required for Interception 11,788 m3
Average depth (m) 0.5
Total depth (plus free board) 1.5 m
Total Design Capacity required: 33,788 m3
Max Volume in Dam Over 11788
MAP= 323 mm
Symons pan MAE (mm)= 2450
Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug
Symons pan(%MAE) 10.07 11.9 13.71 13.6 10.45 9.02 6.3 4.54 3.45 3.99 5.44
Symons pan (mm) 270 284 295 277 210 193 144 115 91 106 154
pan factor 0.81 0.82 0.83 0.84 0.88 0.88 0.88 0.87 0.85 0.83 0.81
Gross Lake Evapor.(mm) 219 233 245 233 185 170 127 100 77 88 125
Rainfall (% MAP) 5.5 8.4 10.7 14.3 17.6 19.2 11.3 4.9 1.4 1.3 2.3 Ave Rainfall (mm) 20 30 39 61 61 71 38 14 5 3 5
Interception Dam [Inflow-Outflow = Delta Storage]
Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug
Inflow (m3) 1549 2323 3020 4723 4723 5498 2942 1084 387 232 387
Direct Rain 440 660 858 1342 1342 1562 836 308 110 66 110
Monthly catchment run_off 1109 1663 2162 3381 3381 3936 2106 776 277 166 277
Wash Water 14m3/hr
Dust Suppression 9.9m3/hr(.30)
Bio Filter efluent 4.58m3/hr
Added Daily Water 0 0 0 0 0 0 0 0 0 0 0
Outflow (m3) 4811 5123 5387 5119 4066 3736 2788 2201 1702 1936 2744
Evaporation 90% Efficiency 4811 5123 5387 5119 4066 3736 2788 2201 1702 1936 2744 Added Daily Water 0 0 0 0 0 0 0 0 0 0 0
Return Water 21m3/hr
0 0 0 0 0 0 0 0 0 0 0
Inflow-Outflow (m3) (3263) (2800) (2367) (396) 658 1761 155 (1117) (1315) (1703) (2357)
Delta Storage 0 0 0 0 658 2419 2574 1456 142 0 0
Maximum month end capacity (m3) 2574
Month 1:100y Storm Occurs (m³) 0 0 0 0 0 0 9214 0 0 0 0
Spillage from Dam in time Period Following
the 1:100y Storm?FALSE
Average Year
D a m
A v e r a g e
D e p t h ( m )
Page 1 of 3
10/16/2014
8/10/2019 Water Balance Evapo Dam Rev0
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Sishen Waste Tire Yar
Evaporation Dam
Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug
Symons pan(%MAE) 10.07 11.9 13.71 13.6 10.45 9.02 6.3 4.54 3.45 3.99 5.
Symons pan (mm) 270 284 295 277 210 193 144 115 91 106 1
pan factor 0.81 0.82 0.83 0.84 0.88 0.88 0.88 0.87 0.85 0.83 0.
Gross Lake Evapor.(mm) 219 233 245 233 185 170 127 100 77 88 1
Rainfall (% MAP) 5.5 8.4 10.7 14.3 17.6 19.2 11.3 4.9 1.4 1.3 2
Ave Rainfall (mm) 20 30 39 61 61 71 38 14 5 3
Interception Dam [Inflow-Outflow = Delta Storage]
Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug
Inflow (m3) 1549 2323 3020 4723 4723 5498 12157 1084 387 232 3
Direct Rain 440 660 858 1342 1342 1562 836 308 110 66 1
Monthly catchment run_off 1109 1663 2162 3381 3381 3936 2106 776 277 166 2
1:100y Storm 0 0 0 0 0 0 9214 0 0 0
Outflow (m3) 4811 5123 5387 5119 4066 3736 2788 2201 1702 1936 27
Evaporation 90% Efficiency 4811 5123 5387 5119 4066 3736 2788 2201 1702 1936 27
Added Daily Water 0 0 0 0 0 0 0 0 0 0
Return Water 21m3/hr
0 0 0 0 0 0 0 0 0 0
Inflow-Outflow (m3) (3263) (2800) (2367) (396) 658 1761 9369 (1117) (1315) (1703) (235
Delta Storage 0 0 0 0 658 2419 11788 10671 9356 7653 529
Maximum month end capacity (m3) 11788
Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug
Symons pan(%MAE) 10.07 11.9 13.71 13.6 10.45 9.02 6.3 4.54 3.45 3.99 5.Symons pan (mm) 270 284 295 277 210 193 144 115 91 106 1
pan factor 0.81 0.82 0.83 0.84 0.88 0.88 0.88 0.87 0.85 0.83 0.
Gross Lake Evapor.(mm) 219 233 245 233 185 170 127 100 77 88 1
Rainfall (% MAP) 5.5 8.4 10.7 14.3 17.6 19.2 11.3 4.9 1.4 1.3 2
Ave Rainfall (mm) 20 30 39 61 61 71 38 14 5 3
Interception Dam [Inflow-Outflow = Delta Storage]
Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug
Inflow (m3) 1549 2323 3020 4723 4723 5498 2942 1084 387 232 3
Direct Rain 440 660 858 1342 1342 1562 836 308 110 66 1
Monthly catchment run_off 1109 1663 2162 3381 3381 3936 2106 776 277 166 2
1:100y Storm 0 0 0 0 0 0 0 0 0 0
Outflow (m3) 4811 5123 5387 5119 4066 3736 2788 2201 1702 1936 27Evaporation 90% Efficiency 4811 5123 5387 5119 4066 3736 2788 2201 1702 1936 27
Added Daily Water 0 0 0 0 0 0 0 0 0 0
Return Water 21m3/hr
0 0 0 0 0 0 0 0 0 0
Inflow-Outflow (m3) (3263) (2800) (2367) (396) 658 1761 155 (1117) (1315) (1703) (235
Delta Storage 0 0 0 0 658 2419 2574 1456 142 0
Maximum month end capacity (m3) 2574
Year of 1:100y Storm
Year following 1:100y Storm
Page 2 of 3
10/16/2014
8/10/2019 Water Balance Evapo Dam Rev0
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Sishen Waste Tire Yard
Evaporation Dam
Oct Nov Dec Jan Feb Mar Apr May Jun Jul AugSymons pan(%MAE) 10.07 11.9 13.71 13.6 10.45 9.02 6.3 4.54 3.45 3.99 5.4
Symons pan (mm) 270 284 295 277 210 193 144 115 91 106 15
pan factor 0.81 0.82 0.83 0.84 0.88 0.88 0.88 0.87 0.85 0.83 0.8
Gross Lake Evapor.(mm) 219 233 245 233 185 170 127 100 77 88 12
Rainfall (% MAP) 5.5 8.4 10.7 14.3 17.6 19.2 11.3 4.9 1.4 1.3 2.
Ave Rainfall (mm) 20 30 39 61 61 71 38 14 5 3
Interception Dam [Inflow-Outflow = Delta Storage]
Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug
Inflow (m3) 1549 2323 3020 4723 4723 5498 2942 1084 387 232 38
Direct Rain 440 660 858 1342 1342 1562 836 308 110 66 11
Monthly catchment run_off 1109 1663 2162 3381 3381 3936 2106 776 277 166 27
1:100y Storm 0 0 0 0 0 0 0 0 0 0
Outflow (m3) 4811 5123 5387 5119 4066 3736 2788 2201 1702 1936 274
Evaporation 90% Efficiency 4811 5123 5387 5119 4066 3736 2788 2201 1702 1936 274
Added Daily Water 0 0 0 0 0 0 0 0 0 0
Return Water 21m3/hr
0 0 0 0 0 0 0 0 0 0
Inflow-Outflow (m3) (3263) (2800) (2367) (396) 658 1761 155 (1117) (1315) (1703) (2357
Delta Storage 0 0 0 0 658 2419 2574 1456 142 0 0
Maximum month end capacity (m3) 2574
Max Water Level (m³) 33788 33788 33788 33788 33788 33788 33788 33788 33788 33788 33788
Full Supply Level (m³) 11788 11788 11788 11788 11788 11788 11788 11788 11788 11788 11788
Max Avg Operating Level (m³) 2574 2574 2574 2574 2574 2574 2574 2574 2574 2574 2574
2 Years after 1:100y Storm
Page 3 of 3
10/16/2014
