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Integrated Strategic Development Framework KNYSNA | STATUS QUO | OCTOBER 2013 CIVIL SERVICES, ROADS AND TRANSPORTATION KNYSNA | INTEGRATED STRATEGIC DEVELOPMENT.

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Presentation on theme: "Integrated Strategic Development Framework KNYSNA | STATUS QUO | OCTOBER 2013 CIVIL SERVICES, ROADS AND TRANSPORTATION KNYSNA | INTEGRATED STRATEGIC DEVELOPMENT."— Presentation transcript:

1 Integrated Strategic Development Framework KNYSNA | STATUS QUO | OCTOBER 2013 CIVIL SERVICES, ROADS AND TRANSPORTATION KNYSNA | INTEGRATED STRATEGIC DEVELOPMENT FRAMEWORK | OCTOBER

2 Integrated Strategic Development Framework KNYSNA | STATUS QUO | OCTOBER 2013 CIVIL SERVICES CONTENTS WATER INFRASTRUCTURE SEWER INFRASTRUCTURE ROAD INFRASTRUCTURE STORMWATER INFRASTRUCTURE TRANSPORTATION SOLID WASTE 2 KNYSNA | INTEGRATED STRATEGIC DEVELOPMENT FRAMEWORK | OCTOBER 2013

3 WATER INFRASTRUCTURE KNYSNA TOWN  Water SourcesKnysna River(65%), Gouna River(17%), Bigai Springs, Glebe Dam(10%), Akkerkloof Dam, Boreholes  Treatment InfrastructureKnysna Water Treatment Works and Reverse Osmosis Plant  Treatment Capacity23.25 Ml/day  Current DemandAvg/Peak(Dec)10/15 Ml/day3650 Ml/a  Future DemandAvg/Peak(Dec)15/23 Ml/day5475 Ml/a  Storage Ml in 41 Reservoirs/Tanks The assured yield (98%) of the main raw water sources is estimated at 4489 Ml/a. The permitted abstraction (Knysna/Gouna Rivers) are 4740 Ml/annum The graphical information of the future treated water demand indicate that the demand will exceed the assured yield in approximately , based on a 3% growth. Water losses are estimated at 14.4%, 4% down from the previous year. 3 KNYSNA | INTEGRATED STRATEGIC DEVELOPMENT FRAMEWORK | OCTOBER 2013

4 WATER INFRASTRUCTURE PROBLEMS IDENTIFIED The above dictates that future water sources will be largely dependant on the augmentation of the existing sources (dams) and possibly desalination plants. The bulk distribution and storage system is adequate for the existing status quo, but do not have the capacity to deal with the full occupation of existing developments and future developments. Bulk supply routes to Old Place Lower, Dam se Bos, Thessen Hill and Leisure Isle have insufficient capacity. Insufficient storage zones identified was Eastford Lower, Concordia East, Heuwelkruin Lower, Thessen Hill, Bongani, Dam se Bos, Old Place Low Level, Corlet Drive and The Heads. The Akkerkloof Dam only holds enough water to supply the town with water for 30 days. The recommended minimum is 60 days 4 KNYSNA | INTEGRATED STRATEGIC DEVELOPMENT FRAMEWORK | OCTOBER 2013

5 KNYSNA-BELVIDERE-BRENTON WATER INFRASTRUCTURE 5 KNYSNA | INTEGRATED STRATEGIC DEVELOPMENT FRAMEWORK | OCTOBER 2013

6 WATER INFRASTRUCTURE SEDGEFIELD  Water SourcesKaratara River(57%), Desalination Plant(42%), Boreholes  Treatment InfrastructureSedgefield Water Treatment Works Desalination Plant  Treatment Capacity4.0 Ml/day 1.5 Ml/d  Current DemandAvg/Peak(Dec) 2/3 Ml/day730/1095 Ml/a  Future DemandAvg/Peak(Dec)4.26 Ml/day1555Ml/a  Storage4.0 Ml in 3 Reservoirs The permitted abstraction (Karatara River) are 740 Ml/a, The assured yield of river is calculated at 340 Ml/a. PROBLEMS IDENTIFIED The figures indicate that Sedgefield have a water supply problem and cannot cope with any major development at present or growth. The bulk distribution and storage system is adequate for the existing status quo, but do not have the capacity to deal with the full occupation of existing developments and future developments. The main town zone has insufficient storage. 6 KNYSNA | INTEGRATED STRATEGIC DEVELOPMENT FRAMEWORK | OCTOBER 2013

7 SEDGEFIELD WATER INFRASTRUCTURE 7 KNYSNA | INTEGRATED STRATEGIC DEVELOPMENT FRAMEWORK | OCTOBER 2013

8 WATER INFRASTRUCTURE KARATARA  Water SourcesKaratara River  Treatment InfrastructureKaratara Water Treatment Works  Treatment Capacity0.79 Ml/day  Current Demand Avg/Peak(Dec) 0.2 Ml/day max73 Ml/a  Future DemandAvg/Peak(Dec)0.323 Ml/day117.9 Ml/a  Storage0.8 Ml in 2 Reservoirs The current abstraction from the Karatara River is 81Ml/a. The Treatment Works and storage provide adequately for the demand. Water is pumped out of the Karatara River and stored in an off-channel dam. The assured yield of the Karatara River is sufficient to supply the village onwards but may be affected by future developments in the area. PROBLEMS IDENTIFIED The 5km bulk supply line is in a poor condition and requires complete replacement. 8 KNYSNA | INTEGRATED STRATEGIC DEVELOPMENT FRAMEWORK | OCTOBER 2013

9 WATER INFRASTRUCTURE KARATARA 9 KNYSNA | INTEGRATED STRATEGIC DEVELOPMENT FRAMEWORK | OCTOBER 2013

10 WATER INFRASTRUCTURE BUFFALO BAY  Water SourcesGoukamma River  Treatment InfrastructureBuffalo Bay Water Treatment Works  Treatment Capacity0.95 Ml/day  Current Demand Avg/Peak(Dec) 0.1/0.5 Ml/day36.5 Ml/a  Storage1.5 Ml in 4 Reservoirs The current abstraction from the Karatara River is 41 Ml/a. The Treatment Works and storage provide adequately for the normal demand but cannot cope with the seasonal peak. In lieu of the fact that the village is hemmed in by nature reserves, no major developments are foreseen, hence no future demands are indicated. 10 KNYSNA | INTEGRATED STRATEGIC DEVELOPMENT FRAMEWORK | OCTOBER 2013

11 BUFFALO BAY WATER INFRASTRUCTURE 11 KNYSNA | INTEGRATED STRATEGIC DEVELOPMENT FRAMEWORK | OCTOBER 2013

12 WATER INFRASTRUCTURE RHEENENDAL  Water SourcesHomtini River  Treatment InfrastructureKeurhoek Water Treatment Works  Treatment Capacity0.61 Ml/day  Current Demand Avg/Peak(Dec) 0.2/0.28 Ml/day max73 Ml/a  Future DemandAvg/Peak(Dec)0.41 Ml/day Ml/a  Storage0.4 Ml in 1 Reservoir and 1 Tower The assured yield of the Homtini River is sufficient for the village. No storage facility for raw water is in place and off-channel storage and associated increase in pumping capacity be provided to ensure the security of the supply for further development. PROBLEMS IDENTIFIED The bulk distribution and storage system is adequate for the existing status quo, but does not allow for growth and as such raw water sources will need to be investigated. The entire town has insufficient reservoir storage. 12 KNYSNA | INTEGRATED STRATEGIC DEVELOPMENT FRAMEWORK | OCTOBER 2013

13 RHEENENDAL WATER INFRASTRUCTURE 13 KNYSNA | INTEGRATED STRATEGIC DEVELOPMENT FRAMEWORK | OCTOBER 2013

14 WATER INFRASTRUCTURE BRENTON  Water SourcesBoreholes and Knysna WTW  Treatment InfrastructureNil  Treatment CapacityNil  Current Demand Avg/Peak(Dec) 0.4/0.6 Ml/day  Future DemandAvg/Peak(Dec)0.6/0.9 Ml/day  Storage3.17 Ml in 6 Reservoirs The current water demand is 146 Ml/annum. Water is obtained from boreholes, with the Knysna WTW as supplementary source when required. PROBLEMS IDENTIFIED It must be noted that any substantial developments that require water will have a major impact on the total water use figures as the areas are relatively small. 14 KNYSNA | INTEGRATED STRATEGIC DEVELOPMENT FRAMEWORK | OCTOBER 2013

15 BRENTON WATER INFRASTRUCTURE 15 KNYSNA | INTEGRATED STRATEGIC DEVELOPMENT FRAMEWORK | OCTOBER 2013

16 WATER INFRASTRUCTURE BELVIDERE  Water SourcesBoreholes and Knysna WTW  Treatment Infrastructure-  Treatment Capacity-  Current Demand Avg/Peak(Dec) 0.3/0.45 Ml/day  Future DemandAvg/Peak(Dec)0.45/0.7 Ml/day  Storage- The current water demand is 110 Ml/annum. Water is obtained from boreholes, with the Knysna WTW as supplementary source when required. 16 KNYSNA | INTEGRATED STRATEGIC DEVELOPMENT FRAMEWORK | OCTOBER 2013

17 BELVIDERE WATER INFRASTRUCTURE 17 KNYSNA | INTEGRATED STRATEGIC DEVELOPMENT FRAMEWORK | OCTOBER 2013

18 WASTE WATER INFRASTRUCTURE KNYSNA TOWN  Drainage ZonesSystem is subdivided in 16 zones, all draining towards the Knysna Waste Water Treatment Plant (WWTW) via a network of collector sewers and rising mains  Treatment InfrastructureActivated Sludge Plant and SBR Plant  Treatment Capacity8.2 Ml/dayPDWF = 7.8 Ml/day  Pump stations44 The Plant was recently upgraded and was reported as being functional to Allowing for proposed developments, the ultimate treatment capacity must be in the order of Ml/d Investigations are currently in process finding a suitable location for a new Treatment Works. PROBLEMS IDENTIFIED Some sections in the reticulation was identified with insufficient capacity for the generated flows. The topography dictates numerous pump stations. The maintenance thereof are problematic and costly 18 KNYSNA | INTEGRATED STRATEGIC DEVELOPMENT FRAMEWORK | OCTOBER 2013

19 WASTE WATER INFRASTRUCTURE KNYSNA 19 KNYSNA | INTEGRATED STRATEGIC DEVELOPMENT FRAMEWORK | OCTOBER 2013

20 WASTE WATER INFRASTRUCTURE SEDGEFIELD  Drainage ZonesSystem is subdivided in 5 zones, all draining towards the Knysna Waste Water Treatment Plant (WWTW) via a network of collector sewers and rising mains  Treatment InfrastructureActivated Sludge Plant and Conservancy Tanks  Treatment Capacity0.75 Ml/dayPDWF = 1.7 Ml/day  Pump stations17 The estimated current average dry weather flow is within the capacity of the Works. Approximately 1220 out of a possible 3200 erven is connected to the sewerage network, the balance are on conservancy tanks. If the total area is reticulated, the ultimate treatment capacity should be 3-4 Ml/d, and previous recommendations was to extend the plant immediately to 2 Ml/d. Upgrading proposals was tabled, Phase 1 being the upgrading of the existing works. Final effluent is discharged into a infiltration pond west of the works. 20 KNYSNA | INTEGRATED STRATEGIC DEVELOPMENT FRAMEWORK | OCTOBER 2013

21 WASTE WATER INFRASTRUCTURE PROBLEMS IDENTIFIED As mentioned, the Works is sufficient for the average daily flows, but cannot handle the peak flows required. This are compounded when additional waste from the conservancy tanks are deposited by tankers. The current configuration of the Works do not meet the Special Limits Values required for the final effluent. The quality of the effluent is a concern to DWA due to potential groundwater contamination. Pump stations and the maintenance thereof are problematic and costly 21 KNYSNA | INTEGRATED STRATEGIC DEVELOPMENT FRAMEWORK | OCTOBER 2013

22 WASTE WATER INFRASTRUCTURE SEDGEFIELD 22 KNYSNA | INTEGRATED STRATEGIC DEVELOPMENT FRAMEWORK | OCTOBER 2013

23 WASTE WATER INFRASTRUCTURE KARATARA  Drainage ZonesWelsynsdorp (123 houses) are fully serviced. Bergvallei and Bosdorp are not connected to the sewer system  Treatment InfrastructureActivated Sludge Plant and Conservancy Tanks  Treatment Capacity0.17 Ml/dayPDWF = 0.20 Ml/day  Pump stations2 The Works are operating below its capacity, but it was noted that capacity problems was encountered during wet conditions. Potential developments (340 erven) will increase the PDDWF to 0.38 Ml/d which will affect the effectiveness of the plant. The Conditional Assessment report (2010) states the infrastructure as good. PROBLEMS IDENTIFIED The Master Plan (2008) states the rising mains to the treatment works as overloaded. 23 KNYSNA | INTEGRATED STRATEGIC DEVELOPMENT FRAMEWORK | OCTOBER 2013

24 WASTE WATER INFRASTRUCTURE RHEENENDAL  Drainage ZonesTwo zones exist, both pumping to the Treatment works  Treatment InfrastructureActivated Sludge Plant  Treatment Capacity0.90 Ml/dayPDWF = 0.20 Ml/day  Pump stations2 The total required future capacity required is in the order of 0.35 Ml/day, subject to further developments. Effluent is discharged into the surrounding streams. The Conditional Assessment report (2010) states the infrastructure in the good to excellent category. PROBLEMS IDENTIFIED The current configuration of the Works do not meet the Special Limits Values required for the final effluent. The Plant’s inability to remove nitrates will make it difficult to attain Green Drop status 24 KNYSNA | INTEGRATED STRATEGIC DEVELOPMENT FRAMEWORK | OCTOBER 2013

25 WASTE WATER INFRASTRUCTURE KARATARA AND RHEENENDAL 25 KNYSNA | INTEGRATED STRATEGIC DEVELOPMENT FRAMEWORK | OCTOBER 2013

26 WASTE WATER INFRASTRUCTURE BRENTON  Drainage ZonesThree zones exist, all pumping to the Treatment works  Treatment InfrastructureHybrid STP  Treatment Capacity0.34 Ml/dayPDWF = 0.33 Ml/day  Pump stations3 The Sewer Master Plan (2008) records the development of a further 173 stands, which will result in a long term PDDWF of Ml/d, still within the existing plants capacity. Effluent is discharged into the sea. The Conditional Assessment report (2010) states the infrastructure as varied, with some of the electrical components as poor. Brenton on Lake have septic and holding tanks PROBLEMS IDENTIFIED The current configuration of the Works do not meet the Special Limits Values required for the final effluent. The Plant’s inability to remove nitrates will make it difficult to attain Green Drop status 26 KNYSNA | INTEGRATED STRATEGIC DEVELOPMENT FRAMEWORK | OCTOBER 2013

27 WASTE WATER INFRASTRUCTURE BRENTON 27 KNYSNA | INTEGRATED STRATEGIC DEVELOPMENT FRAMEWORK | OCTOBER 2013

28 WASTE WATER INFRASTRUCTURE BELVIDERE  Drainage ZonesThree zones exist, all pumping to the Treatment works  Treatment InfrastructureBeacon Watertec STP  Treatment Capacity0.29 Ml/dayPDWF = 0.20 Ml/day  Pump stations3 The average future flow is estimated at 0.2Ml/d, peaking at Ml/d which will exceed the existing capacity of the plant. Effluent is discharged into a artificial pond in Belvidere Estate. The Conditional Assessment report (2010) states the infrastructure as good to fair. Sections of reticulation have 0% capacity or in the 0-30% category capacity and cognisance to be taken thereof for future development in the area. BUFFALO BAY Currently serviced by septic and conservancy tanks only. A new Treatment Works is foreseen in the medium term and should have a capacity of 0.2 Ml/d 28 KNYSNA | INTEGRATED STRATEGIC DEVELOPMENT FRAMEWORK | OCTOBER 2013

29 WASTE WATER INFRASTRUCTURE BELVIDERE 29 KNYSNA | INTEGRATED STRATEGIC DEVELOPMENT FRAMEWORK | OCTOBER 2013


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