Drought Severity Index Calculator

Calculate drought severity using precipitation deficits, temperature anomalies, and soil moisture to assess agricultural and water supply risk.

Actual Precipitation (inches)

Normal Precipitation (inches)

Temperature Above Normal (°F)

Soil Moisture (%)

Formula

Severity Score = (Precip Deficit% x 0.4) + (Temp Anomaly x 3) + ((100 - Soil Moisture%) x 0.3); D0 < 30, D1 30-45, D2 45-60, D3 60-80, D4 > 80

undefined

Estimate daily evapotranspiration rate for irrigation planning using temperature, humidity, wind speed, and solar radiation data.

Estimate annual soil loss using the Universal Soil Loss Equation based on rainfall, soil type, slope, cover, and conservation practices.

Calculate accumulated growing degree days for crop planning based on daily temperatures and base temperature for your crop type.