Camp Water Supply

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Input Data

Enter your project data

Persons in the camp (persons)

Total number of people living in the camp

Accommodation type (water norm)

ShNQ 2.04.01-22 Annex 3 item 2: maximum day 100 / 120 / 160 L per person

Custom norm, maximum day (L/person/day)

Daily water per person on the maximum day

Custom norm, maximum hour (L/person/h)

Water per person in the maximum hour

Kitchen / dining hall

Annex 3 item 16: 12 L per meal (incl. dish washing)

Meals per person per day (meals)

Meals cooked in the camp kitchen

Main meal served in (h)

Time in which the main meal is served - gives the kitchen peak hour

Laundry

Annex 3 item 8: 75 L/kg mechanised, 40 L/kg non-mechanised

Dry laundry per person per day (kg)

Work clothes, bed linen, towels

Laundry working hours (h/day)

Gives the laundry peak hour

Storage tank

Ground tank: the booster feeds the camp. Elevated tank: gravity is checked first, the booster covers only the difference

Tower height (tank bottom above the ground) (m)

Elevated tank only

Fire reserve in the tank

Added to the tank volume; the well pump refills it within the refill time

Fire flow (L/s)

ShNQ 2.04.02-19 Table 7 (e.g. 10 L/s for small 1-2 storey buildings)

Fire duration (h)

ShNQ 2.04.02-19 2.30: 3 h

Fire reserve refill time (h)

Time to refill the fire reserve after a fire

Static water level (below ground) (m)

Water level in the well when the pump is off

Drawdown while pumping (m)

From the pumping test; dynamic level = static level + drawdown

Pump setting depth (m)

Enter the real value (well log / pump installation). At least 3 m below the dynamic level, at least 2 m above the well bottom

Well depth (m)

For the setting depth check

Horizontal distance well → tank (m)

Length of the rising main on the ground

Tank ground level above the well head (m)

Negative when the tank is lower than the well head

Distance booster → camp (m)

Delivery main to the camp entrance

Camp ground level above the tank ground (m)

Negative when the camp is lower than the tank

Floors of the highest building (floors)

Required free head at the entrance = 10 m + 4 m per floor above the first

Number of fixtures in the camp (0 = estimate) (pcs)

All draw-off points (washbasins, showers, WCs, sinks, washing machines). 0: estimated from the persons

Losses / unaccounted water (%)

Added to the daily demand (leaks, flushing)

Tank height (inlet above the tank bottom) (m)

The float valve inlet is at the top of the tank

Storage (day)

Tank volume = daily demand × days (+ fire reserve)

Well yield (0 = unknown) (L/s)

Safe yield from the pumping test

Well pump working hours (h/day)

The tank covers the rest of the day

Free head at the float valve (m)

Pressure needed at the tank inlet valve

Rising main size (0 = automatic) (mm)

PE100 SDR11 outside diameter

Distance tank → booster (m)

Suction pipe length

Suction pipe size (0 = automatic) (mm)

PE100 SDR11 outside diameter

Delivery main size (0 = automatic) (mm)

PE100 SDR11 outside diameter

Required pressure at the camp entrance (0 = from floors) (m)

Own value instead of 10 + 4·(n − 1)

Losses in the camp network (m)

Yard network from the camp entrance to the farthest building

Booster set

Fixed speed with pressure switch and diaphragm tank, or variable speed (VSD)

Duty pumps (0 = automatic) (pcs)

Plus one standby pump

Cut-in / cut-out difference (bar)

Pressure switch difference

Allowed starts per hour (1/h)

From the motor data (small motors 20-30, larger 10-15)

Friction formula

Hazen-Williams, KMK / SNiP plastic pipes or Darcy-Weisbach

Hazen-Williams C (-)

140 for PE pipes

Local losses (kl) (%)

ShNQ 2.04.01-22 item 120: 30 % for domestic water networks

Maximum velocity (m/s)

For the automatic pipe size (suction ≤ 1.2 m/s)

Well pump efficiency (%)

For the power estimate

Booster pump efficiency (%)

For the power estimate

Site altitude (m)

Atmospheric pressure for the NPSH

Water temperature (°C)

Vapour pressure and viscosity

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Calculation Results

Calculated instantly from your inputs

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The well pump and the booster are sized for different flows: the well pump fills the tank over its working hours (maximum day / hours), the booster must give the peak second flow of the camp (shift change, all showers). Pump heads start from the dynamic water level (not the well depth) and from the low water level of the tank. With an elevated tank the camp may be fed by gravity; the booster then only adds the missing pressure.

Key Points:

ShNQ 2.04.01-22 norms and probability method (q = 5·q0·α)
Well pump flow and head from the dynamic water level
Ground or elevated tank, optional fire reserve
Booster flow and head, pressure switch settings, diaphragm tank
Pipe sizes, friction and local losses for every line
NPSH, setting depth and well yield checks, motor power
All flows in L/s and m³/h

Calculation Steps:

Enter all required parameters
Click "Update Calculation"
Review results and analysis

Formula Variables:

Hst + s Dynamic water level (m)

α Simultaneity coefficient (-)

q0 Flow of one fixture (L/s)

LWL Low water level of the tank (m)