TOPIC COLLECTION
Wells & water
A focused path through related explanations and calculation tools.
LEARN THE SYSTEM
Guides in this topic
Will a well supply the water your home needs?
Read well logs, understand drawdown and turn flow measurements into pump and storage questions.
How much rainwater can your roof collect?
Estimate catchment yield, understand storage limits and keep rainwater separate from drinking water.
Choose a water pipe size without guessing
Connect fixture demand, internal diameter, velocity, pressure loss and pump performance.
Understand pressure, head and flow in a private water system
Measure static and dynamic pressure, include elevation and read the pump at its operating point.
USE THE NUMBERS
Calculators in this topic
Rainwater collection & overflow
Estimate one rainfall event and the amount a tank can receive.
Household water demand
Estimate daily use and an explicit buffer-storage volume.
Well drawdown & specific capacity
Interpret water levels from a recorded pumping test.
Pump head & electrical power
Combine lift, delivery pressure and friction in a first-pass pump calculation.
Water velocity in a pipe
Convert flow and internal pipe diameter into water velocity.
Water volume in a round tank
Estimate the water held in a vertical cylindrical tank from its internal dimensions.
Water pressure to head
Convert water pressure into metres of head and psi using a stated density.
Hot and cold water mixing
Estimate hot and cold volumes needed to reach a target mixed-water temperature.
Water stored above a well-pump reserve level
Estimate the cylindrical water column and volume above a protected pump-intake level.
Observed well water-level recovery
Convert a measured rise in a cylindrical well into equivalent volume and an average recovery observation.