// analysis tool · v1.0.0
The reservoir arbitrator
Stored water is not automatically usable, and generating now is not always optimal.
Local teaching scenario. No live price, hydrological forecast or remote calculation.// l0g tool
The reservoir arbitrator
Compare an immediate sale, waiting, and a pumping cycle. This is a teaching model, not a hydrological forecast or a real dispatch engine.
Allocations exceed published stock. Usable energy is floored at zero.
Gross values before fixed costs, grid constraints, future inflows, ecological flows, tax and contracts. A water allocation cannot be converted automatically into GWh.
Method, formulas and sources
For a reservoir, the model subtracts strategic reserves, user-converted non-power allocations and technical unavailability from published stock. It compares an immediate sale with a future value weighted by the assumed share still usable. For pumped storage, it applies round-trip efficiency to pumping energy and compares future revenue with the purchase cost.
- Usable = published stock - reserve - non-power allocation - unavailability
- Expected future value = usable × future availability × future price
- Future threshold = current price ÷ future availability
- Pumped output = pumping energy × round-trip efficiency
- RTE, hydropower generation and water opportunity value
- NVE/RME, what is water value?
- ElCom Directive 1/2026, Swiss hydropower reserve
- ENTSO-E Transparency Platform, stored-energy methodology
Model v1.0.0 · 2026-08-21