# How to Calculate and Solve for Time Required to Irrigate | Irrigation Water Requirement

**Last Updated on April 22, 2024**

The image above represents the time required to irrigate. Three essential parameters are needed to calculate the time required to irrigate: the Area of the Land (A), the Depth of the Water to be Applied (dw), and the Discharge of the Stream (q).

**The formula for calculating the time required to irrigate:**

t = ^{A . dw} / _{q}

Where the following applies:

t = Time Required to Irrigate

A = Area of the Land

d_{w} = Depth of the Water to be Applied

q = Discharge of the Stream

So, let’s Solve an example;

Find the time required to irrigate when the area of the land is 14, the depth of the water to be applied is 20 and the discharge of the stream is 10.

This implies the following:

A = Area of the Land = 14

d_{w} = Depth of the Water to be Applied = 20

q = Discharge of the Stream = 10

t = ^{A . dw} / _{q}

t = ^{14 . 20} / _{10}

So, t = ^{280} / _{10}

t = 28

Therefore, the **time required to irrigate** is **28.**

**Calculating for the Area of the Land when the Time Required to Irrigate, the Depth of the Water to be Applied and the Discharge of the Stream is Given**

A = ^{t x q} / _{dw}

Where the following applies:

A = Area of the Land

t = Time Required to Irrigate

d_{w} = Depth of the Water to be Applied

q = Discharge of the Stream

So, let’s Solve an example;

Find the area of the Land when the time required to irrigate is 20, the depth of the water to be applied is 12 and the discharge of the stream is 3.

This implies the following

t = Time Required to Irrigate = 20

d_{w} = Depth of the Water to be Applied = 12

q = Discharge of the Stream = 3

A = ^{t x q} / _{dw}

That is, A = ^{20 x 3} / _{12}

A = ^{60} / _{12}

A = 5

Therefore, the **area of the land** is **5.**

Read more: How to Calculate and Solve for Inflow Time | Irrigation Water Requirement

**Calculating for the Depth of the Water to be Applied when the Time Required to Irrigate, the Area of the Land and the Discharge of the Stream are Given**

d_{w} = ^{t x q} / _{A}

Where the following applies:

d_{w} = Depth of the Water to be Applied

t = Time Required to Irrigate

A = Area of the Land

And then, q = Discharge of the Stream

Then, let’s Solve an example;

Find the depth of the water to be applied when the time required to irrigate is 15, the area of the land is 14, and the discharge of the stream is 12.

This implies that;

t = Time Required to Irrigate = 15

A = Area of the Land = 14

q = Discharge of the Stream = 12

d_{w} = ^{t x q} / _{A}

That is, d_{w} = ^{15 x 12} / _{14}

d_{w} = ^{180} / _{14}

d = 12.85

Therefore, the **depth of the water to be applied** is **12.85.**

**Calculating for the Discharge of the Stream when the Time Required to Irrigate, the Area of the Land and the Depth of the Water to be Applied is Given**

q = ^{A . dw} / _{t}

Where;

q = Discharge of the Stream

t = Time Required to Irrigate

A = Area of the Land

And then, d_{w} = Depth of the Water to be Applied

So, let’s Solve an example;

Find the discharge of the stream when the time required to irrigate is 20, the area of the land is 10 and the depth of the water to be applied is 8.

This implies the following:

t = Time Required to Irrigate = 20

A = Area of the Land = 10

d_{w} = Depth of the Water to be Applied = 8

q = ^{A . dw} / _{t}

q = ^{10 . 8} / _{20}

So, q = ^{80} / _{20}

q = 4

Therefore, the **discharge of the stream** is **4.**

Read more: How to Calculate and Solve for Discharge | Logarithmic Method | Irrigation Water Requirement

**How to Calculate Time Required to Irrigate Using Nickzom Calculator**

Nickzom Calculator – **The Calculator Encyclopedia** is capable of calculating the time require to irrigate.

To get the answer and workings of the time required to irrigate 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 **Irrigation Water Requirement **under **Agricultural**

Now, Click on **Time Required to Irrigate**** **under **Irrigation Water Requirement**

The screenshot below displays the page or activity to enter your values, to get the answer for the time required to irrigate according to the respective parameters which is the **Area of the Land (A), Depth of the Water to be Applied (d _{w}) **and

**Discharge of the Stream (q).**

Now, enter the values appropriately and accordingly for the parameters as required by the **Area of the Land (A)** is **14**,** Depth of the Water to be Applied (d _{w}) **is

**20**and

**Discharge of the Stream (q)**is

**10**.

Finally, Click on Calculate

As you can see from the screenshot above, **Nickzom Calculator**– The Calculator Encyclopedia solves for the time required to irrigate and presents the formula, workings and steps too.