Calculate rainfall-runoff using NRCS Curve Number and Rational Method calculators on SmallSeaTools.com. Perfect for hydrology professionals and enthusiasts

🌧️ Rainfall-Runoff Calculators

Welcome to SmallSeaTools.com! Use our advanced tools to calculate rainfall-runoff using the NRCS Curve Number Method and the Rational Method. Perfect for hydrology professionals and enthusiasts. 🛠️

📏 NRCS Curve Number Method Calculator

Estimate runoff from rainfall based on land use, soil type, and hydrologic condition.

Rainfall (mm): Curve Number:

📈 Rational Method Calculator

Calculate peak discharge for small watersheds based on rainfall intensity and catchment area.

Rainfall Intensity (mm/hr): Catchment Area (km²): Runoff Coefficient:

⚠️ Disclaimer

These calculators are for educational and professional use only. Results may vary based on real-world conditions. Always verify with field measurements.

📖 How to Use

1. Enter the required values in the input fields.
2. Click the "Calculate" button to get the result.
3. Use the results for analysis or planning.