A Common Resource
“Workshop Sessions I and II A entitled "GW/SW
Interactions I and II"
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
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
• 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?
• Support method development for RDM and piloting
• Research projects (understanding GW/SW
– Low Flows and Stream flow Reduction Activities
• Popular Handbook
• Research Agenda
• Implementation of RDM
• “Integrated” Water Resource Assessments
• Low Flows and Stream Flow Reduction Activities