OPTIMA: Optimisation   for Sustainable
Water Resources Management

OPTIMA: optimisation strategy

The optimisation of the WRM water resources model scenarios is a central component in OPTIMA.

The start point is defined by

  • the set of ISSUES identified by/with/from the stakeholders
  • its implementation in the baseline scenario of WRM.

The baseline scenario is extended to include a very basic economic evaluation of costs and benefits of water supply and demands met.

The baseline scenario should be presented to, and discussed with, the stakeholders for each case study to incorporate their comments and suggestions as an important step towards acceptance of the eventual results.

The baseline scenario is now extended for optimisation by

  1. defining the OBJECTIVES in terms of a set of CONSTRAINTS to be met;
    (defined a hyper-region in model performance space).
  2. defining the possible measures, strategies, policies in terms of INSTRUMENTS;
    (defined a hyper-region in decision space).
For both CONSTRAINTS and INSTRUMENTS a simple questionnaire has been prepared to compile the data in a structured, consistent format:
    DRAFT questionnaire: CONSTRAINTS
    DRAFT questionnaire: INSTRUMENTS

For INSTRUMENTS, there is an on-line Water Technologies Data Base that includes both generic and location specific instruments from which initial and default values can be extracted when editing an optimization scenario:

The procedure

  1. Select a baselines scenario including economic assessment

  2. Define/edit a corresponding optimisation scenario in terms of CONSTRAINTS and INSTRUMENTS Please note that in the first level implementation, we only support NODE SPECIFIC INSTRUMENTS for DEMAND NODES.
    Use the questionnaires to compile and structure the information, refer to the manual page on Optimisation Scenarios for implementation details.

  3. Identify a set of feasible alternatives by running the optimization model, iteratively relaxing and tightening the CONSTRAINTS

  4. Eliminate dominated alternatives (from larger sets) to identify a Pareto optimal set

  5. Use the DISCRETE MULTI-CRITERIA TOOL to (interactively, possibly as a group exercise involving the stakeholders or proxies) identify and select an efficient (optimal) multi-criteria solution

Optimisation Related Manual Pages:

Optimisation Deliverables:

  • D03.1 Water Resources Modeling Tools
  • D03.2 Basic Optimization Model
  • D03.3 Discrete Multi-Criteria Optimization

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