gtopt/reservoir_discharge_limit.hpp file

Piecewise-linear volume-dependent discharge limit for reservoirs.

Defines the ReservoirDischargeLimit structure modelling a volume-dependent maximum discharge rate for a reservoir. This is a safety/environmental constraint that limits the hourly-average discharge as a piecewise-linear function of the reservoir volume (e.g. to prevent landslides or excessive drawdown).

The constraint per stage is: qeh ≤ a(seg) × V_avg + b(seg) where qeh is the stage-average hourly discharge [m³/s], V_avg is the average reservoir volume (eini + efin) / 2 [hm³], and a/b are the slope and intercept of the active piecewise-linear segment.

When segments has more than one entry, update_lp() selects the active segment based on the reservoir's current volume (from the previous LP solve) and dynamically updates the LP constraint coefficients.

{
  "uid": 1,
  "name": "ddl_ralco",
  "reservoir": "RALCO",
  "segments": [
    { "volume": 0.0,   "slope": 0.069868, "intercept": 15.787 },
    { "volume": 757.0, "slope": 0.13985,  "intercept": 57.454 }
  ]
}