General Overview of Integrated Hydrological Planning (IHP) New sub-directorate –Natural Hydrology; both groundwater and surface water –Interaction between surface and groundwater –Conjunctive use –Climate change

Functions Support service to DWAF –CD:IWRP –CD:IM –RDM Management and guideline documents (management tools) –Hydrological planning and management –Geohydrological management and planning –Limited development of tools to support planning

PSP Projects Groundwater Decision Tool (GDT) (DWAF and WRC)GDT Guideline document: Planning, development and management of dolomitic aquifers Guideline document: Artificial recharge as part of planning. (WRC and DWAF)

In-house projects Conjunctive use –Deep aquifers in the Eastern Limb of the BICBIC –Alluvial aquifers and off-channel storage Support to Internal Strategic Perspectives (ISPs) Albany Coast, ORWRDP, GWRA II GRIP (Limpopo and Eastern Cape)

Thank you

Exploration: What are we looking at ? 1000m Ore Body Exploration Drilling – can start 15years prior to mining and continuous till and during mining As deep as ore? Impacts on groundwater environmental or resource? Yes/No NATURAL GROUNDWATER ? EIA/EMP/EMPR (Resource assessment) RLS REEF Geological structures Magmatic intrusion

Mineral vs. Groundwater exploration

Borehole depth distribution Impact? Or not?

1000m

Development: Inflow risk or not? 1000m 1 2

300m Shear zone up to 100m wide Major jointing; filled with dyke material Development: Near surface at shear zone Development: Near surface at shear zone. ABCDE

South African Groundwater Decision Tool

Overview Aquifer Characterization GIS (ACGIS) Groundwater Decision Tool (GDT) Groundwater Dictionary The South African Groundwater Decision Tool (SAGDT) will comprise of the integration of the following applications:

ACGIS

GDT Note: Not to scale GIS Area Population Borehole Slug Test CooperJ Toxin Scenario Object Tree River Boundary River Boundary Toxin Population Slug Test Cooper Jacob

Groundwater Dictionary Target audience range from novice to expert user Formal definitions, descriptions and layman’s terms Definitions supported by pictures and animation FET water network and development of education tool

Scenario Wizard Typical example scenarios: Reserve determination on quaternary / internal world level Decanting of open cast / underground mine Contamination of village water supply etc… 1.Step-by-step guide in setting up pre-defined scenarios 2.Valuable software training tool 3.Aimed at the inexperienced user

Open cast mine