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    • Reservoir and Storage Nodes
  • Tutorials
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    • Modelling basin reservoir systems
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      • Adding a Source Representing Groundwater
      • Additional Exercises
      • Adding reservoir bathymetry, evaporation, and rainfall
        • Background on Evaporation and Precipitation on Reservoirs
        • Adding reservoir bathymetry (Area)
        • Adding reservoir bathymetry (Level)
        • Adding monthly evaporation and rainfall
      • Using allocation penalties and control rules to balance sources
      • Control Curves and Demand Savings
        • Adding reservoir control curves and demand savings (reductions)
    • Using Allocation Penalties to Allocate Water
      • Exercise 1a Two nodes
      • Exercise 1b Two demands
      • Exercise 1c Minimum Flow Properties
      • Exercise 2a Simple system with reservoir draw downs
      • Exercise 2b Simple system with overflow
    • Pywr-scenarios reading external DataFrame and adding Custom Rules
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      • Create Custom Rule - TranscientDecisionParameter
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  • Creating topology
  • Configure node’s attributes
  • Explanation

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  1. Tutorials
  2. Using Allocation Penalties to Allocate Water

Exercise 1b Two demands

PreviousExercise 1a Two nodesNextExercise 1c Minimum Flow Properties

Last updated 1 month ago

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Note: Create a new network called Exercise 1b and setup the timestep before running the network as described in Exercise 1a.

Creating topology

Navigate to the left panel and click on Build to open the Nodes list.

Drag and drop to the workspace Map:

· 1 input node

· 2 output nodes

Click on edge to activate “link mode”. And connect the nodes as shown in the picture below:

Click again on edge to deactivate “link mode”.

Note: To learn more about different node types, refer to the documentation here.

Configure node’s attributes

Double-click on each node to open the node panel on the right side of the screen and setup the nodes as in the following image

On the left panel Click on Run a Model .

A new window will pop-up, click on Submit

Explanation

The input node can supply a maximum of 10 Mm³/day, but both output nodes have demands that total 16 Mm³/day. Since both demands have negative allocation penalties, the network prioritizes based on the magnitude of these penalties. The output node with the more negative allocation penalty receives higher priority.

In this case, the left output node has an allocation penalty of -10, which is a higher priority compared to the right output node’s allocation penalty of -5. Consequently, water will be allocated to the left output node first, and any remaining water will be allocated to the right output node.

Water Strategy allows you to visualize different results on the same graph. To do, click on any node and then click on the icon for the attribute simulated_flow.

Select the desired attributes from the drop-down list and click on the icon