1. What is OASIS? Water resources simulation/optimization model
Uses goals and constraints
Purposes:
Alternatives evaluation
Real-time operations and drought management
Gaming
Used in
Water allocation/conflict resolution
Hydropower relicensing and operations
Municipal system planning and operations
OASIS LITE VS OASIS

2. Applications of OASIS
OASIS has been used to manage the water resources of 60 million people

3. Advantages of OASIS Quick to build a system and powerful to run
All continuity equations are automatically written
Linear programming solver
1/10th the code of Riverware, 1/100th the run time
Easy to use interface
Flexible
Operations control language provides creative operating rules
Works dynamically with other models (e.g., water quality, groundwater, salinity)

4. Alternatives Evaluation
A major purpose of OASIS is to compare alternatives. That is, to compare the performance of alternative sets of facilities, demands, and operating policies over the whole range of the hydrologic record.

5. Drought (Risk) Management
Evaluate tradeoffs between adding new supplies and imposing demand restrictions
Develop triggers for implementing remedial actions
Quantify the risk associated with the plan
Frequency
Magnitude
Duration

6. Model Input Time series of unregulated inflows
Time series of net evaporation
Physical data (reservoir SAE, turbine characteristics, channel capacities, etc.)
Operating Policies, e.g.
Rule curves
Minimum releases/environmental flows
Drought and flood management policies
Energy requirements

7. Model Output at every point in the system Tables and Graphs of
Elevation
Flow
Derived attributes, e.g.habitat availability, energy, revenue, water supply shortages, recreation days
at every time step
at every point in the system

8. Rivanna River Basin OASIS model

9. Output