- Collect Data: Obtain data from local weather stations, meteorological departments, or online databases. Ensure the data covers a long enough period to be statistically significant.
- Calculate Average: Use statistical software or a spreadsheet to calculate the mean daily rainfall. This gives you an idea of the typical rainfall amount.
- Analyze Patterns: Look for trends such as months with higher rainfall or years with significant droughts. This helps in understanding the variability and extremes.
- Determine Design Storm: Based on your analysis, choose a storm event that represents the worst-case scenario for your area. Engineers often use return periods (e.g., 10-year, 50-year and 100-year storms) to define this.
- Runoff Analysis: Apply hydrological models like the Rational Method or SCS Curve Number method to estimate how much rainfall will become runoff, which is what your structure will need to capture.
- Size Your Structure: Use the runoff estimates to calculate the volume of water your dam or pan needs to hold. This will inform the dimensions and design features required.
I was trying to extract using excel but I am experiencing some difficulties. Anyone to guide me on the easiest way to accomplish the task?
New contributor
Willie CEO is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.