What this tool does
Turn source level and delivery requirements into one transparent flow-and-head duty point while keeping pump setting depth separate as a submergence check.
When to use it
Use after a representative pumping water level and sustained demand flow are known. Re-run for seasonal low water levels and other operating cases.
Inputs and supported units
Each labelled field explains the quantity it expects. Unit-system changes convert existing numeric entries once and keep calculations on a single SI internal basis. Supported shared units include L/min and GPM, metres and feet, kPa and psi, millimetres and inches, kW and hp, and °C and °F as relevant.
Calculation or decision method
Pump setting depth is compared with pumping level to report submergence. It is not added to TDH because the energy balance starts at the pumped water surface.
How to interpret the result
Read the primary result with the supporting breakdown and warning. A plausible number is not evidence that every input, operating case or design constraint has been included.
Worked example
At 45 L/min, a 28 m pumping level, 6 m discharge elevation, 240 kPa delivery pressure and 8 m losses produce about 66.5 m TDH. A pump set at 42 m has 14 m submergence.
Assumptions
Depths share the wellhead datum; the pumping level represents the stated flow; gauge delivery pressure and losses apply at that flow.
Limitations
No well recovery model, cable sizing, motor cooling, check-valve, sand, water-quality or transient analysis is included.
Sources
- U.S. Geological Survey — Basic Ground-Water Hydrology
- U.S. Geological Survey — Water Resources Glossary
- Hydraulic Institute — Combined Pump & System Curves