Water allocation deficit ledger calculator

Calculate period [high allocated,low allocated,high deficit,low deficit,end storage] JSON with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use period [high allocated,low allocated,high deficit,low deficit,end storage] JSON to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Initial available storage (m³)
100
Period inflows (m³)
20,10,30
Period high-priority demands (m³)
50,50,50
Period lower-priority demands (m³)
20,20,20
Fixed losses before allocation (m³)
5,5,5
Period [high allocated,low allocated,high deficit,low deficit,end storage] JSON
[[50,20,0,0,45],[50,0,0,20,0],[25,0,25,20,0]]

Try another scenario

Initial available storage (m³)
101
Period inflows (m³)
[20, 10, 30]
Period high-priority demands (m³)
[50, 50, 50]
Period lower-priority demands (m³)
[20, 20, 20]
Fixed losses before allocation (m³)
[5, 5, 5]
Period [high allocated,low allocated,high deficit,low deficit,end storage] JSON
[[50,20,0,0,46],[50,1,0,19,0],[25,0,25,20,0]]
Calculation method

Calculation method

Period [high allocated,low allocated,high deficit,low deficit,end storage] JSON

Add inflow, deduct supplied losses, satisfy high then lower priority from available storage; no capacity spill or legal allocation rules.

Symbols and units
a
Initial available storage (m³)
b
Period inflows (m³)
c
Period high-priority demands (m³)
d
Period lower-priority demands (m³)
e
Fixed losses before allocation (m³)

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Assumptions & limits

Assumptions & limits

  • User-supplied measurements and assumptions; Add inflow, deduct supplied losses, satisfy high then lower priority from available storage; no capacity spill or legal allocation rules. Supported limits: Finite numeric values bounded to 1e9 magnitude; lists and tables contain 1–100 records unless a stricter bound is stated. Inputs use the units shown. Lists explicitly paired by a method must have matching lengths; independent polynomial coefficient vectors may differ. Respect stated physical, interpolation, policy and computational domain limits.
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Further reading

Method reference ↗

Background reading; this does not imply endorsement or independent review of SumFizz.

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