Plumbing Sprinkler Precipitation Rate Calculator

Calibrate actual timed sprinkler catch-can depths weighted by represented area; not inferred nozzle flow divided by nominal rectangle or universal application rate.

Description

Sprinkler precipitation is measured as collected depth per time.

Sprinkler precipitation is measured as collected depth per time. Catch cans representing unequal areas require area weights.^[1]

The returned values include Observed precipitation mm hour, Area weighted precipitation mm hour. The How section below explains the calculation, input rules and interpretation.

When to use Plumbing Sprinkler Precipitation Rate Calculator

Use Plumbing Sprinkler Precipitation Rate Calculator when you need to evaluate the supplied records under the calculation and evidence rules below. No nozzle-flow estimate, irrigation uniformity certification or universal application rate is inferred.

Prepare measured flows, pressures, temperatures or inventories with consistent units. For catalog tools, use independently verified capacities at the stated operating conditions and supply the explicit design demand.

How to use Plumbing Sprinkler Precipitation Rate Calculator and understand its results

Prepare measured flows, pressures, temperatures or inventories with consistent units. For catalog tools, use independently verified capacities at the stated operating conditions and supply the explicit design demand.
Enter observedCatchCanWaterMm, observedTestMinutes, representedCatchCanAreasM2 using the field table and calculation rules, then run the tool.
Read observedPrecipitationMmHour, areaWeightedPrecipitationMmHour. The explanation below defines the units, signs, ordering and any flags or placeholder values.
If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.

Input field	Meaning	Value type; see rules below	Requirement
observedCatchCanWaterMm	Observed catch can water mm	list of number	Required
observedTestMinutes	Observed test minutes	number	Required
representedCatchCanAreasM2	Represented catch can areas m2	list of number	Required

Enter aligned nonempty nonnegative catch depths and positive represented areas, plus positive test minutes. Return catch-can mm/h and an area-weighted rate.

rate_i=60×depthMm_i/minutes; pooled=sum(rate_i×area_i)/sum(area)

Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.

Output field	Meaning	Value type
observedPrecipitationMmHour	Observed precipitation mm hour	list of number
areaWeightedPrecipitationMmHour	Area weighted precipitation mm hour	number

json

{
  "input": {
    "observedCatchCanWaterMm": [
      2,
      4,
      6
    ],
    "observedTestMinutes": 10,
    "representedCatchCanAreasM2": [
      1,
      2,
      1
    ]
  },
  "output": {
    "observedPrecipitationMmHour": [
      12,
      24,
      36
    ],
    "areaWeightedPrecipitationMmHour": 24
  }
}

Limitations and assumptions

No nozzle-flow estimate, irrigation uniformity certification or universal application rate is inferred.

Numeric inputs, where present, must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Numeric lists are limited to 10,000 entries; string lists to 128 strings of at most 128 characters each. The rules above may impose smaller limits. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.

Alternative or Complementary methods

Use Plumbing Irrigation Flow Rate Calculator: Simultaneous irrigation demand depends on which zones operate together. Scenario flags preserve the caller’s concurrency assumptions. For a complementary task, use Plumbing Drip Irrigation Emitter Flow Calculator: Emitter discharge depends on a measured pressure calibration. Observed counts weight the inventory at each operating pressure.

References

Plumbing Sprinkler Precipitation Rate Calculator — tool.io

Similar or alternative tools

Plumbing Irrigation Flow Rate Calculator
Simultaneous irrigation demand depends on which zones operate together. Scenario flags preserve the caller’s concurrency assumptions.
Plumbing Drip Irrigation Emitter Flow Calculator
Emitter discharge depends on a measured pressure calibration. Observed counts weight the inventory at each operating pressure.