Close the units before closing the water balance
Editorial update: 2026-10-08

EXAMPLE / ПРИМЕР / EXEMPLE
P / 100 mm = 200,000 m³
ET / 40 mm = 80,000 m³
Q / 70,000 m³ = 35 mm
2 km²: residual 25 mm = 50,000 m³ (fictional).

BLANK WORKSHEET / ШАБЛОН / FICHE VIERGE
Boundary and area: ____________________
Period and time zone: ____________________
Source and original units for P, ET, Q: ____________________
Conversions and uncertainty: ____________________
Residual and omitted exchanges: ____________________

SOURCES / ИСТОЧНИКИ
USGS: water budget components — https://www.usgs.gov/centers/oklahoma-texas-water-science-center/science/water-budget-science-oklahoma-and-texas