Recarga aquífero
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
~20% precip
About this calculator
The groundwater recharge calculator estimates the volume of rainfall that infiltrates the soil to replenish aquifers. Using average annual precipitation data, it applies a typical 20% infiltration rate (ranging from 10-30%) to determine effective groundwater replenishment. This tool is vital for water resource planning and sustainable urban development projects.
To use the calculator, input the region's average annual rainfall. It accounts for factors like soil permeability, vegetation density, and urbanization levels that influence infiltration rates, but provides approximate values for initial planning. Environmental engineers and water management agencies often use it in hydrological vulnerability assessments.
Keep in mind that results are estimates. For precise technical studies, field measurements such as local infiltration tests and historical hydrological data are recommended. This calculator serves as a general guideline but should not replace specialized hydrogeological analysis.
Frequently asked questions
Why does recharge rate vary between 10-30%?
Variation occurs due to factors like soil type (clay reduces infiltration), vegetation density, and urban imperviousness. Areas with more rock or asphalt, for example, have lower rates.
Does this calculator work for all regions in Brazil?
Yes, but the formula is an approximation. For areas with atypical geology (e.g., sandstone or impermeable rocks), adjust parameters with local data.
How to input precipitation data?
Enter the annual average in millimeters (mm) or convert from cubic meters as needed. The calculation accounts for catchment area if applicable.
Can I use this for agricultural projects?
Yes, but for irrigation or rainwater harvesting planning, supplement with field measurements or consult an irrigation technician.