Laaste Hoop Regional Water Supply Scheme
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CONTRACT WP 9711 DEVELOPMENT OF A RECONCILIATION STRATEGY FOR ALL TOWNS IN THE NORTHERN REGION CAPRICORN DISTRICT MUNICIPALITY POLOKWANE LOCAL MUNICIPALITY FIRST ORDER RECONCILIATION STRATEGY LAASTE HOOP REGIONAL WATER SUPPLY SCHEME Laaste Hoop Ward 7, Laaste Hoop Ward 7A, Maboi, Manthorwane, Mogole, Quayle and Tsatsaneng DRAFT VERSION 1.3 MAY 2011 Prepared by Prepared for: SRK Consulting Department of Water Affairs PO Box 55291 Directorate: National Water Resource Planning NORTHLANDS Private Bag X313 2116 PRETORIA, Tel: +27 (0) 11 441 1111 0001 E-mail: [email protected] RECONCILIATION STRATEGY FOR LAASTE HOOP RWS REPORT NO. {1} DEVELOPMENT OF A RECONCILIATION STRATEGY FOR ALL TOWNS IN THE NORTHERN REGION FIRST ORDER RECONCILIATION STRATEGY FOR LAASTE HOOP REGIONAL WATER SUPPLY SCHEME EXECUTIVE SUMMARY The strategy objectives and methodology are presented in a separate report titled “Methodology followed for the Development of Reconciliation Strategies for the All Town Study Northern Region ” and must be read in conjunction with this document. Location and Background Information The Laaste Hoop cluster is located at the eastern part of the Polokwane Local Municipality (PLM) and includes the settlements of Laaste Hoop Ward 7, Laaste Hoop Ward 7A, Maboi, Manthorwane, Mogole, Quayle and Tsatsaneng. The study area is essentially rural area presently served by a long bulk supply main from Ebenezer Dam. It lies in an area where low groundwater lithology occurs. There is no surface water resources located within the study area like major dams or rivers. Water Resource Availability and Requirements The present water use requirement for the cluster was calculated as 0.493 Million m3/a, the scheme is estimated to be supplying a population of 10 638 using the estimated benchmark population base of 2007. The demographic studies show the cluster to have a declining population growth over the next 20 years. The ‘high growth’ scenario offers a picture of strongly negative growth with the population declining to 9 841 by 2030 and the ‘low growth’ scenario offers an even more negative picture with a decline to 8 950 people by 2030. Water Balance Reconciliation options The Laaste Hoop cluster appears to be in deficit against benchmark water requirements. The total combine present supply from both the groundwater and surface water of 0.197 Million m3/a is insufficient to supply the current and future requirements of the cluster, in order to supply current and future domestic requirements the Ebenezer pipeline supply to the Laaste Hoop RWS will have to be increase by 0.250 Million m3/a by year 2010, this increase will have to be revise continuously to supply a total increase of 0.295 Million m3/a by year 2030. Groundwater supply continually developed to provide the balance of the requirement. The level of utilisation, status and scientific evaluation of the existing boreholes needs to be verified. Poor management of water supply services are experienced resulting in high losses and high water use. Water Conservation and Water Demand Management measures must be implemented both to minimise losses in distribution and to ensure that users remain within the bounds set by benchmark requirements. It is essential that all abstraction, delivery and use of water is accurately metered and monitored so that management measures can be affected. X:\G\Proj 1\Proj\390778_DWAF North\7REPORTS\Strategies\All Strategies_19Dec2011\Limpopo\Capricorn DM\Polokwane LM\Laaste Hoop.docx May 2011 i RECONCILIATION STRATEGY FOR LAASTE HOOP RWS REPORT NO. {1} Augmentation options and/or implementation of WC/WDM requirements 0.70 0.60 0.50 0.40 /annum 3 Mm 0.30 0.20 0.10 0.00 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 Years Laaste Hoop RWS - Augmentation (Groundwater) Laaste Hoop RWS - Augmentation (Ebenezer) Laaste Hoop RWS (Ebenezer Dam) Laaste Hoop RWS - Groundwater WC/WDM Measures (Low growth scenario) WC/WDM Measures (High growth scenario) Estimated Future Requirements (Low growth scenario) Estimated Future Requirements (High growth scenario) Confidence level of Information available for the study area The confidence level for the information in this study area is medium due to the low confidence in the current water use and abstraction reports. Priority rating for the development of a detailed reconciliation strategy The Laaste Hoop RWS is considered to have a Priority 4 (High) rating for the development of a detailed reconciliation strategy as the cluster is currently in deficit. The level of data supporting this estimate can be improved through the validation and confirmation of the current water use and abstraction. X:\G\Proj 1\Proj\390778_DWAF North\7REPORTS\Strategies\All Strategies_19Dec2011\Limpopo\Capricorn DM\Polokwane LM\Laaste Hoop.docx May 2011 ii RECONCILIATION STRATEGY FOR LAASTE HOOP RWS REPORT NO. {1} CONCLUSIONS • The present water requirements for the cluster was calculated as 0.197 Million m3/a, using the estimate base population of 2007. This requirement is projected to increase to 0.563 Million m3/a by year 2030 based on the high growth scenario. • The Laaste Hoop Cluster is supply with both the groundwater and surface water resources, the present water supplied from groundwater resources is 0.137 Million m3/a as indicated in the WSDP. The present supply from the surface water resources via the Ebenezer bulky supply main is estimated at 0.06 Million m3/a. The total combine present supply from both the groundwater and surface water of 0.197 Million m3/a is insufficient to supply the current and future requirements. • Base on the consumption analysis, the Laaste Hoop RWS is considered to have a Priority 4 (High) rating for the development of a detailed reconciliation strategy as the cluster is currently in deficit STRATEGY/RECOMMENDATIONS • Water use requirements for domestic users are currently based on benchmark estimates. These requirements need to be balanced with the actual use. The groundwater resource needs to be upgraded over and above current capacity to meet the balance of the additional needs. • The present allocation from the Ebenezer pipeline needs to be revised to meet the additional requirements. This must be undertaken as a matter of urgency. • Groundwater should be used in all areas where distribution of surface water is too expensive. Groundwater can also be used conjunctively to supplement surface water. • Any additional demands on the Laaste Hoop RWS need to be listed and factored into the water availability scenario. • A Water Conservation and Demand Management Strategy must be developed and implemented. o A water management metering system with leakage detection and a repair programme must be implemented. Individual use must also be managed. o Illegal connections from the bulk pipeline must be routed to the reticulation pipeline and all use metered. • With accurate metering in place, annual water use must be monitored and requirements adjusted as indicated by trends in population and use. X:\G\Proj 1\Proj\390778_DWAF North\7REPORTS\Strategies\All Strategies_19Dec2011\Limpopo\Capricorn DM\Polokwane LM\Laaste Hoop.docx May 2011 i RECONCILIATION STRATEGY FOR LAASTE HOOP RWS REPORT NO. {1} Signature Below is the strategy for the Laaste Hoop Regional Water Supply Scheme. It has been accepted and signed by Capricorn District Municipality, Polokwane Local Municipality, DWA Regional Office and the DWA Head Office (D: NWRP) as follows: Town WMA DM WSA WSDP Status Laaste Hoop Limpopo Capricorn Polokwane LM Draft 2008 cluster September Names:………………………………………. Names:………………………………………. Signature:…………………………………… Signature:…………………………………… Date:………………………………………… Date:………………………………………… Position:…………………......... Polokwane Position:…………………………… Capricorn LM DM Names:………………………………………. Names:………………………………………. Signature:…………………………………… Signature:…………………………………… Date:………………………………………… Date:………………………………………… Position:…………………………………DWA Position:………………………………DWA D: Regional Office National Water Resource Planning X:\G\Proj 1\Proj\390778_DWAF North\7REPORTS\Strategies\All Strategies_19Dec2011\Limpopo\Capricorn DM\Polokwane LM\Laaste Hoop.docx May 2011 i RECONCILIATION STRATEGY FOR LAASTE HOOP RWS REPORT NO. {1} TABLE OF CONTENTS CONCLUSIONS ..................................................................................................................... I STRATEGY/RECOMMENDATIONS ...................................................................................... I 1 INTRODUCTION ......................................................................................................... 1 1.1 Study Area ................................................................................................................ 1 1.2 Regional Setting ....................................................................................................... 1 1.3 Economic Drivers ..................................................................................................... 3 1.4 Confidence Level of Information Available for the Study Area ............................. 3 2 POPULATION AND DEMOGRAPHICS ...................................................................... 3 3 CURRENT WATER REQUIREMENTS ....................................................................... 3 3.1 Present Water Requirements and Historical Water Use ........................................ 3 3.2 Level of Services .....................................................................................................