Classification of water resources and and Resource Quality Objectives in the Inkomati Catchment...
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Transcript of Classification of water resources and and Resource Quality Objectives in the Inkomati Catchment...
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 RooyenModified by and presented by: Delana Louw17 March 2014
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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
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
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)
Step 4 and 5: IWRM & MCsThe 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 anddetermining 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
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Catchment Analysis
Ecological Water
Requirements
Socio-EconomicWater Requirements
Catchment Resource Availability
Catchment Resource Availability
Protection
Management Class (Decision)
Use
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 scenarioNWRC is the process to evaluate and recommend what that scenario entails
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Scenario evaluation and MCChallenges: 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.
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)
Scenario Evaluation Process
Scenario Description
WaterAvailability
Analysis
Estimate consequences
Compare, rank & optimise
scenarios
Formulate Alternative Scenarios
Select relevant
scenarios
Stakeholder Evaluation
Vision
EcologicalEcosystem Services
EconomicsNon-Ecological Water Quality
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
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
Score
Score
For all scenarios
Relative to present provisions
Inte
grat
ed C
ompa
rison
(all
varia
bles
)
Multi-criteria assessment method
Consequences
FishPhysico-chemical
Geomorphology
Macroinvertebrates
Riparian vegetation
ECOLOGICAL STATE
Culture
Regulating
Riparian vegetationFood, Fuel
ECOSYSTEM SERVICES
Consequences
Jobs
GDP
ECONOMY
Scenario Comparison Visualisation
1 2 3 4 5 6
PES
REC
5
6
910
1.0 2.0 3.0 1.0 2.0 3.0 1.0 2.0 3.0
PES
REC
5
6
910
1.0 2.0 3.0
PESREC
5
6
9
10
1.0 2.0 3.0
Ecological Status
relative to REC
EcosystemServices
Economic Indicator Employment
0.5 0.05 0.2 0.25
Overall Ranking (Rank Order)
Deriving the Management Class
IUAScenarios and Management Class
PES REC 1 2 3 41 II II III III III III2 III III III III III III3 III II III III III III4 II II III III III III5 I I I I I I
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.