Blyde Local Sources Water Supply Scheme

CONTRACT WP 9711 DEVELOPMENT OF A RECONCILIATION STRATEGY FOR ALL TOWNS IN THE NORTHERN REGION GREATER SEKHUKHUNE DISTRICT MUNICIPALITY GREATER TUBATSE LOCAL MUNICIPALITY: FIRST ORDER RECONCILIATION STRATEGY FOR BLYDE LOCAL SOURCES WATER SUPPLY SCHEME Ditholong, Ga-Moraba, Leboeng, Lepelle, Makopung, Malaeneng Ext 1, Malekgwarana, Marareng, Phiring, Phiring Ext 1, Phiring Ext 2, Tswenyane, Makgalane, Ga-Sepeke, Malaeneng, Makgwareng DRAFT VERSION 1.2 April 2011 Prepared by Prepared for: SRK Consulting Department of Water Affairs PO Box 35290 Directorate: National Water Resources Planning MENLO PARK Private Bag X313 0081 PRETORIA, Tel: +27 (0) 12 361 9821 0001 E-mail: [email protected] RECONCILIATION STRATEGY FOR BLYDE SCHEME REPORT NO. { 1 } DEVELOPMENT OF A RECONCILIATION STRATEGY FOR ALL TOWNS IN THE NORTHERN REGION FIRST ORDER RECONCILIATION STRATEGY FOR BLYDE LOCAL GROUNDWATER SOURCES WATER SUPPLY SCHEME EXECUTIVE SUMMARY The rudimentary strategy objectives and methodology are presented in a separate report titled “ Starter document: 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 focus of this document is on settlements of Ditholong, Ga-Moraba, Leboeng, Lepelle, Makopung, Malaeneng Ext 1, Malekgwarana, Marareng, Phiring, Phiring Ext 1, Phiring Ext 2, Tswenyane, Makgalane, Ga-Sepeke, Malaeneng and Makgwareng that are situated on the eastern part of the Greater Tubatse Local Municipality in the Greater Sekhukhune District. The Blyde Local Sources cluster receive water supply mainly from boreholes. A large fountain found in this cluster is also a major source of supply to a significant number of villages. Water Resource Availability and Requirements The consumption in the Blyde Local Groundwater Sources Scheme was estimated by the groundwater specialists, WSM Leshika to be 0.07 Million m 3/a for 2005. The Eskom population based water requirement figures indicate a high underestimation of the real water requirements considering the actual water use of 1.75 Million m 3/a. This 1.75 Million m 3/a was used as the benchmark water requirement figure for 2010 as per the Water Services data. The calculated water requirement based on Water Services borehole water use is projected to increase to 1.934 Million m3/a by the year 2030. A fountain that exists in this cluster is one of the sources of domestic water supply for the Blyde Local Sources cluster. The fountain water use is not metered or monitored such that the fountain available yield is unknown. The Main source of supply is the boreholes. The available groundwater that could be used to augment the current supply was estimated to be 0.12 Million m 3/a. Groundwater availability in this cluster should be confirmed as the aquifer appears to be stressed. Water balance with reconciliation options The cluster appears to be in deficit based on the current groundwater supply against the current and future water requirement. The current water supply is estimated at 1.75 Million m3/a. The groundwater potential of 0.12 Million m 3/a, is available for further development. The available groundwater resource was used to augment the current groundwater use of 1.75 Million m 3/a. The groundwater resources appear to be insufficient for this cluster. It appears that water losses and very high consumption rates might be serious problems in this cluster as the expected demands based on the current population are actually much lower that what is currently being used in this cluster. X:\G\Proj 1\Proj\390778_DWAF North\7REPORTS\Strategies\All Strategies_19Dec2011\Limpopo\Greater Sekhukhune DM\Greater Tubatse LM\Blyde Local Sources.docx April 2011 i RECONCILIATION STRATEGY FOR BLYDE SCHEME REPORT NO. { 1 } Water Conservation and Water Demand Management measures must be implemented in order to reduce the losses in the distribution system and to ensure the minimization of wasteful water. It is essential that all abstracted water must be metered and continually monitored in order for the implementation of management measures and the ensured effectiveness thereof. Augmentation options and/or implementation of WC/WDM requirements 3 Currentlevel of service 2 2 Mm³/annum 5% growth in 20% growth in house house connection 1 connection by by 2025 2015 1 - 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 Year Augmentation Measures (Groundwater) Groundwater Supply Estimated Future Requirements (Low growth scenario) Estimated Future Requirements (High growth scenario) WC/WDM Measures (Low growth scenario) WC/WDM Measures (High growth scenario) Confidence level of Information available for the study area The confidence level for the information in this area is low as there are no existing records of actual flows for water provided. The fountain water supply is quite significant but there are no records of water supply volumes from this source. Priority rating for the development of a detailed reconciliation strategy: This cluster is considered to have a Priority 4(high) rating for the development of a detailed reconciliation strategy. Water allocations must be registered. X:\G\Proj 1\Proj\390778_DWAF North\7REPORTS\Strategies\All Strategies_19Dec2011\Limpopo\Greater Sekhukhune DM\Greater Tubatse LM\Blyde Local Sources.docx April 2011 ii RECONCILIATION STRATEGY FOR BLYDE SCHEME REPORT NO. { 1 } CONCLUSIONS • The present water requirements for the Blyde Local Sources cluster was calculated as 0.642 Million m 3/a, using the estimate base population of 2007. This requirement is projected to increase to 0.737 Million m 3/a by year 2030 based on the high growth scenario. The actually water use is much higher than the Eskom population based water requirements. The water requirements were thus calculated taking the current water use (1.75 Million m 3/a) as the benchmark water requirements for 2010. These calculated water requirement based on Water Services borehole data water is projected to increase to 1.934 Million m 3/a by the year 2030 • Groundwater use from the fountain is unknown and the groundwater from boreholes was estimated at 1.75 Million m 3/a. • Groundwater (0.12 Million m 3/a) is available to augment the current supply. The combined sustainable yield of the production boreholes is insufficient to meet the projected water requirements for the cluster for the year 2030. However, a detailed hydro geological assessment and borehole census for the region is required to confirm the groundwater availability. • There is potential to extend groundwater use as an addition source of supply. The level of utilisation, status and scientific evaluation of the existing boreholes needs to be verified. • Based on the consumption analysis, the Blyde Local Sources Scheme 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 • Existing groundwater use should be confirmed. The groundwater aquifers appear stressed such that further augmentation is not recommended from groundwater resources. A feasibility study should be done to investigate groundwater availability before any further groundwater development could be considered. • Developing, implementing and monitoring of the Water Conservation and Water Demand Management strategy is urgently required since water consumption appears to be higher than expected. • Limit wasteful water use in order to control the very high water consumption. • Ground water information is sadly lacking in the Greater Tubatse Local Municipality and in the entire Greater Sekhukhune District municipality. Attention should be given immediately to the establishment of a system to monitor quality, tracking and management of groundwater. • Surface water use from the nearest river should be considered as an option to augment the current available groundwater supply. X:\G\Proj 1\Proj\390778_DWAF North\7REPORTS\Strategies\All Strategies_19Dec2011\Limpopo\Greater Sekhukhune DM\Greater Tubatse LM\Blyde Local Sources.docx April 2011 iii RECONCILIATION STRATEGY FOR BLYDE SCHEME REPORT NO. { 1 } Signature This is a strategy for the Blyde Local Sources Water Scheme and it has been accepted and signed by Greater Sekhukhune District Municipality, Greater Tubatse Local Municipality, DWA Limpopo Regional Office and the DWA Head Office (D: NWRP) as follows: Town WMA DM WSA WSDP Status Blyde Local Olifants Greater Greater Draft Sorces Sekhukhune Sekhukhune District DM Municipality Names:………………………………………. Names:………………………………………. Signature:…………………………………… Signature:…………………………………… Date:………………………………………… Date:………………………………………… Position:…………………......... Greater Position:…………………………… [Title and Tubatse LM name] 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\Greater Sekhukhune DM\Greater Tubatse LM\Blyde Local Sources.docx April 2011 iv RECONCILIATION STRATEGY FOR BLYDE SCHEME REPORT NO. { 1 } TABLE OF CONTENTS 1 INTRODUCTION ......................................................................................................... 1 1.1 Study area ................................................................................................................

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