The image above represents discharge | slope area method.

To compute for discharge | slope area method, four essential parameters are needed and these parameters are **Manning’s Co-efficient (N), Area (A), Hydraulic Radius (R)** and** Slope (S).**

The formula for calculating discharge | slope area method:

Q = (^{A} / _{N}) R^{2/3} S^{1/2}

Where;

Q = Discharge

N = Manning’s Co-efficient

A = Area

R = Hydraulic Radius

S = Slope

Let’s solve an example;

Find the discharge when the manning’s co-efficient is 4, the area is 30, the hydraulic radius is 15 and the slope is 22.

This implies that;

N = Manning’s Co-efficient = 4

A = Area = 30

R = Hydraulic Radius = 15

S = Slope = 22

Q = (^{A} / _{N}) R^{2/3} S^{1/2}

Q = (^{30} / _{4}) (15)^{2/3} (22)^{1/2}

Q = (7.5) (6.08) (4.69)

Q = 213.96

Therefore, the **discharge** is **213.96.**

Nickzom Calculator – **The Calculator Encyclopedia** is capable of calculating the discharge | slope area method.

To get the answer and workings of the discharge | slope area method 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 1,500 **per** annum** to have utter access to all functionalities.

You can also try the **demo **version via https://www.nickzom.org/calculator

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Once, you have obtained the calculator encyclopedia app, proceed to the **Calculator Map, **then click on **Agricultural **under **Engineering****.**

Now, Click on **Water Budget **under **Agricultural**

Now, Click on **Discharge| Slope Area Method**** **under **Water Budget**

The screenshot below displays the page or activity to enter your values, to get the answer for the discharge | slope area method according to the respective parameters which are the **Manning’s Co-efficient (N), Area (A), Hydraulic Radius (R)** and** Slope (S).**

Now, enter the values appropriately and accordingly for the parameters as required by the **Manning’s Co-efficient (N)** is **4**,** Area (A)** is **30**,** Hydraulic Radius (R)** is **15 **and** Slope (S)** is **22**.

Finally, Click on Calculate

As you can see from the screenshot above, **Nickzom Calculator**– The Calculator Encyclopedia solves for the discharge | slope area method and presents the formula, workings and steps too.