Time Formula:
From: | To: |
The time calculation formula estimates the time required based on depression head measurements in coarse sand. It uses logarithmic relationships to determine the time difference between two depression head states.
The calculator uses the time formula:
Where:
Explanation: The formula calculates the time based on the logarithmic relationship between two depression head measurements in coarse sand conditions.
Details: Accurate time calculation is crucial for groundwater studies, well testing, and understanding the behavior of water tables in coarse sand aquifers. It helps in determining recovery rates and aquifer characteristics.
Tips: Enter both depression head values in meters. Both values must be positive numbers greater than zero for accurate calculation.
Q1: Why use logarithmic calculation for time?
A: Logarithmic relationships accurately model the rate of change in groundwater levels, particularly in coarse sand where water movement follows specific patterns.
Q2: What are typical depression head values?
A: Depression head values vary depending on aquifer characteristics, but typically range from 0.5 to 30 meters in coarse sand conditions.
Q3: When should this calculation be used?
A: This calculation is specifically designed for coarse sand aquifers during well recovery tests after pumping has stopped.
Q4: Are there limitations to this formula?
A: The formula is most accurate for homogeneous coarse sand aquifers and may require adjustments for mixed soil types or complex geological conditions.
Q5: How precise are the results?
A: Results are mathematically precise based on the input values, but actual field conditions may vary due to factors like aquifer heterogeneity and boundary effects.