1. Classification of water resources and and Resource Quality Objectives in the Inkomati Catchment Methodology to way up the level of protection against water use towards finding the desirable balance and Management Class Original presentations and development of model: Pieter van Rooyen Modified by and presented by: Delana Louw 17 March 2014

2. 2 NWRCS integrated steps 7: Gazette class configuration 6: Resource Quality Objectives (EcoSpecs & water quality (user)) 5: Draft Management Classes 4: Identification and evaluation of scenarios within IWRM 3: Quantify EWRs and changes in Ecosystem Services 2: Initiation of stakeholder process and catchment visioning 1: Delineate units of analysis and describe the status quo Evaluating scenarios and determining MC Evaluating scenarios and determining MC

3. NWRCS integrated steps 1. Status quo, IUA delineation 3. Quantify EWRs & links to EGSA 4. Recommend Scenario & MC 6. RQO PSC 1 THIS PSC 2 MEETING 4. ID Scenarios PSC 3

4. Step 4 and 5: IWRM & MCs NWRCS facilitates finding a balance between protection and use of the water resource. This process takes place during Step 4 and 5. This study is now at the start of this process. What needs to be balanced? Degree of the ecological health / status and socio- economics (Ecosystem services & Economic implications)

5. Step 4 and 5: IWRM & MCs The process of finding a balance is facilitated by assessing different future levels of water resource use. Different levels of water resource use are assessed by means of evaluating a range of possible future scenarios and determining the consequences of these scenarios on users and the environment. Aim is to design an optimised scenario that would result in an acceptable balance. Scenario links to MC and Catchment Configuration

6. 6 Catchment Analysis Ecological Water Requirements Socio-Economic Water Requirements Catchment Resource Availability Protection Management Class (Decision) Use

7. What are scenarios? Scenarios, in context of water resource management and planning are plausible definitions (settings) of all the factors (variables) that influence the water balance and water quality in a catchment and the system as a whole (System’s context) Different levels of water use and protection are evaluated with the aim to find a preferred scenario NWRC is the process to evaluate and recommend what that scenario entails

8. 8 Scenario evaluation and MC Challenges: Integration  Node / reach / river to catchment scale  Ecosystem status/health (non-monetary) versus Socio-economics (non-monetary and monetary Management Class decision suport system or tool based on multi-criteria decision analysis approaches have been developed. The scenario evaluation process and integration fits within this approach.

9. Integrated Assessment of Scenarios Economic Implications Ecosystem Services Ecological health Water Resource System Integrated Units of Analysis River Reaches Biophysical Nodes Elements Variables Scenario Assessment (Resource Unit)

10. Scenario Evaluation Process Scenario Description Water Availability Analysis Water Availability Analysis Estimate consequences Compare, rank & optimise scenarios Compare, rank & optimise scenarios Formulate Alternative Scenarios Select relevant scenarios Stakeholder Evaluation Vision Ecological Ecosystem Services Economics Non-Ecological Water Quality Ecological Ecosystem Services Economics Non-Ecological Water Quality Status quo information. Identify components and metrix relevant for scenario assessment. Status quo information. Identify components and metrix relevant for scenario assessment. Scenario steps Information feeding into the process Evaluate against vision Evaluation and analysis steps

11. For each reach / node For IUA / system Relative importance Degree of meeting REC Weighting process Prevailing situation Relative to base condition Weighting process Makeup of economy Weighting process Score For all scenarios Relative to present provisions Integrated Comparison (all variables) Multi-criteria assessment method Consequences Fish Physico-chemical Geomorphology Macroinvertebrates Riparian vegetation ECOLOGICAL STATE Culture Regulating Riparian vegetation Food, Fuel ECOSYSTEM SERVICES Consequences Jobs GDP ECONOMY

12. Scenario Comparison Visualisation

13. Deriving the Management Class IUA Scenarios and Management Class PESREC1234 1II III 2 3 IIIII 4II III 5IIIIII

14. Scenario Comparison Visualisation  Focus of the rest of the balance methodology presentation is to show how each of the variables come up with the individual ranking order and scoring PRIOR to integration  Note, the catchment used is COMPLETELY HYPOTHETICAL and representative of a typical catchment. The results also – this is just a demonstration and is intended to prepare you for providing input when the scenario evaluation is complete.  Only aspect of this process undertaken during THIS PSC meeting is the input on the scenarios to be evaluated.