Cumulative Infiltration Capacity Given Green-Ampt Parameters Of Infiltration Model Calculator

Green-Ampt Infiltration Model:

\[ F_p = \frac{n}{f_p - m} \]

Parameter 'n' of Infiltration Model by Green-Ampt:

unitless

Infiltration Capacity at Any Time t:

cm/hr

Parameter 'm' of Infiltration Model by Green-Ampt:

unitless

Cumulative Infiltration Capacity:

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1. What is the Green-Ampt Infiltration Model?

The Green-Ampt infiltration model is a physically-based method for estimating infiltration rates into soils. It provides a mathematical representation of the infiltration process based on soil properties and initial moisture conditions.

2. How Does the Calculator Work?

The calculator uses the Green-Ampt formula:

\[ F_p = \frac{n}{f_p - m} \]

Where:

\( F_p \) — Cumulative Infiltration Capacity (cm/hr)
\( n \) — Parameter 'n' of Infiltration Model by Green-Ampt (unitless)
\( f_p \) — Infiltration Capacity at Any Time t (cm/hr)
\( m \) — Parameter 'm' of Infiltration Model by Green-Ampt (unitless)

Explanation: The equation calculates the cumulative infiltration capacity based on the Green-Ampt parameters and the current infiltration capacity.

3. Importance of Cumulative Infiltration Capacity Calculation

Details: Accurate calculation of cumulative infiltration capacity is crucial for hydrological modeling, irrigation planning, flood prediction, and water resource management. It helps in understanding how much water can infiltrate into the soil over time.

4. Using the Calculator

Tips: Enter parameter 'n', infiltration capacity at time t, and parameter 'm'. All values must be valid (n > 0, fp > 0, m ≥ 0, and fp > m).

5. Frequently Asked Questions (FAQ)

Q1: What do parameters 'n' and 'm' represent in the Green-Ampt model?
A: Parameters 'n' and 'm' are empirical constants that characterize the soil properties and initial moisture conditions for a specific watershed.

Q2: How is infiltration capacity at any time t measured?
A: Infiltration capacity is typically measured using infiltrometers or estimated from soil properties and rainfall data.

Q3: What are typical values for parameters 'n' and 'm'?
A: These parameters vary significantly depending on soil type, with higher values typically found in sandy soils and lower values in clayey soils.

Q4: Are there limitations to the Green-Ampt model?
A: The model assumes homogeneous soil properties and may not accurately represent infiltration in layered or heterogeneous soils.

Q5: Can this model be used for all soil types?
A: While applicable to various soil types, parameter values must be calibrated for specific soil conditions for accurate results.