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A Common Resource “Workshop Sessions I and II A entitled "GW/SW Interactions I and II" Kevin Pietersen Water Research Commission Purpose of Workshop • Present “current” understanding of GW/SW interaction processes (through presentation of a number of papers) – Understanding and Quantifying groundwater’s contribution to baseflow (Roger Parsons). – Incorporating SW-GW interactions into the monthly Pitman rainfall-runoff model (Denis Hughes) – SW-GW interaction at small scales: implications for low flow estimates (Simon Lorentz) • Develop recommendations (for research and implementation) Drivers for Understanding? • Integrated Water Resource Management (IWRM) – Common Resource • National Water Policy and National Water Legislation – All water common resource…subject to national control…consistent status in law… – The location of water resource…in relation to land…shall not…confer preferential rights…riparian principle shall not apply – …the unity of the hydrologic cycle …interdependence of elements…basic hydrological unit is the catchment • Implementation, Scientific and Research Issues – Water Situation in South Africa – Resource Protection (RDM and SDC) – Water Use – Water Management – Future Water Uses – Process based studies Common Resource Challenges? • Integration of surface water and groundwater management – Are we serious? • Information about the groundwater resources situation is scarce, fragmented and unsuitable for management purposes – Inadequate knowledge base? • Water resource assessments – Address the occurrence in space and time of both SW/GW quantities and qualities. • Scientific Methods? Research Response? • Support method development for RDM and piloting methods. • Research projects (understanding GW/SW interaction processes). – Zululand – Low Flows and Stream flow Reduction Activities – WR2005 • Popular Handbook Recommendations? • Research Agenda • Implementation of RDM • “Integrated” Water Resource Assessments • Low Flows and Stream Flow Reduction Activities • …..
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