How to Calculate and Solve for Green Ampt Infiltration Model | Methods of Application of Water

September 29, 2020April 18, 2024 Loveth Idoko

Last Updated on April 18, 2024

The image above represents green ampt infiltration model. To calculate green ampt infiltration model, three essential parameters are needed and these parameters are Value (K_s), Distance from the Ground Surface to the Wetting Front (L) and Capillary Suction at the Wetting Front (S).

The formula for calculating green ampt infiltration model:

F_p = ^{K_s(L + S)} / _L

Where:

F_p = Green Ampt Infiltration Model
K_s = Value
L = Distance from the Ground Surface to the Wetting Front
S = Capillary Suction at the Wetting Front

Let’s solve an example;
Find the green ampt infiltration model when the value is 21, the distance from the ground surface to the wetting front is 15 and capillary suction at the wetting front is 4.

This implies that;

K_s = Value = 21
L = Distance from the Ground Surface to the Wetting Front = 15
S = Capillary Suction at the Wetting Front = 4

F_p = ^{K_s(L + S)} / _L
F_p = ^{21(15 + 4)} / ₁₅
Then, F_p = ²¹⁽¹⁹⁾ / ₁₅
F_p = ³⁹⁹ / ₁₅
F_p = 26.6

Therefore, the green ampt infiltration model is 26.6.

Calculating for the Value when the Green Ampt Infiltration Model, the Distance from the Ground Surface to the Wetting Front and the Capillary Suction at the Wetting Front are Given

K_s = ^{F_p x L} / _{L + S}

Where;

K_s = Value
F_p = Green Ampt Infiltration Model
L = Distance from the Ground Surface to the Wetting Front
S = Capillary Suction at the Wetting Front

Let’s solve an example;
Find the value when the green ampt infiltration model is 20, the distance from the ground surface to the wetting front is 12, and the capillary suction at the wetting front is 14.

This implies that;

F_p = Green Ampt Infiltration Model = 20
L = Distance from the Ground Surface to the Wetting Front = 12
S = Capillary Suction at the Wetting Front = 14

K_s = ^{F_p x L} / _{L + S}
That is, K_s = ^{20 x 12} / _{12 + 14}
K_s = ²⁴⁰ / ₂₆
K_s = 9.23

Therefore, the value is 9.23.

How to Calculate Green Ampt Infiltration Model Using Nickzom Calculator

Nickzom Calculator – The Calculator Encyclopedia is capable of calculating the green ampt infiltration model.

To get the answer and workings of the green ampt infiltration model using the Nickzom Calculator – The Calculator Encyclopedia. First, you need to obtain the app.

You can get this app via any of these means:

Web – https://www.nickzom.org/calculator-plus

To get access to the professional version via web, you need to register and subscribe for NGN 2,000 per annum to have utter access to all functionalities.
You can also try the demo version via https://www.nickzom.org/calculator

Android (Paid) – https://play.google.com/store/apps/details?id=org.nickzom.nickzomcalculator
Android (Free) – https://play.google.com/store/apps/details?id=com.nickzom.nickzomcalculator
Apple (Paid) – https://itunes.apple.com/us/app/nickzom-calculator/id1331162702?mt=8
Once, you have obtained the calculator encyclopedia app, proceed to the Calculator Map, then click on Agricultural under Engineering.

Now, Click on Methods of Application of Water under Agricultural

Now, Click on Green Ampt Infiltration Model under Methods of Application of Water

The screenshot below displays the page or activity to enter your values, to get the answer for the green ampt infiltration model according to the respective parameters which is the Value (K_s), Distance from the Ground Surface to the Wetting Front (L) and Capillary Suction at the Wetting Front (S).

Now, enter the values appropriately and accordingly for the parameters as required by the Value (K_s) is 21, Distance from the Ground Surface to the Wetting Front (L) is 15 and Capillary Suction at the Wetting Front (S) is 4.

Finally, Click on Calculate

As you can see from the screenshot above, Nickzom Calculator– The Calculator Encyclopedia solves for the green ampt infiltration model and presents the formula, workings and steps too.