Catchment Area Calculator


In today’s digital age, calculators have become an indispensable tool for various mathematical computations. Among them, the catchment area calculator holds significant importance, especially in urban planning, hydrology, and environmental studies. This article provides a comprehensive guide on how to use a catchment area calculator efficiently, along with a step-by-step implementation.

How to Use

Using the catchment area calculator is straightforward. Simply input the required parameters, such as rainfall intensity, drainage coefficient, and catchment area, into the designated fields. Then, click on the “Calculate” button to obtain the result, which represents the total catchment area.


The formula for calculating the catchment area is as follows:


  • Rainfall IntensityRainfall Intensity is the amount of rainfall in millimeters.
  • Drainage CoefficientDrainage Coefficient is a factor representing the rate at which water drains, typically in liters per second per hectare.

Example Solve

Let’s consider an example where the rainfall intensity is 50 mm and the drainage coefficient is 0.75 L/s/ha.

Using the formula:

Catchment Area=0.0375 ha

So, the catchment area is 0.0375 hectares.


Q: Can this calculator be used for any type of catchment area?
A: Yes, this calculator is versatile and can be used for various types of catchment areas, including those in urban, rural, and natural settings.

Q: What units are used in this calculator?
A: The units used are millimeters for rainfall intensity, liters per second per hectare for drainage coefficient, and hectares for catchment area.

Q: Is the formula provided accurate for all scenarios?
A: While the formula provides a generalized estimation, it may require adjustments based on specific environmental factors and local conditions.


The catchment area calculator is a valuable tool for assessing water drainage and management strategies. By accurately estimating the catchment area, urban planners, hydrologists, and environmentalists can make informed decisions to mitigate flood risks and ensure sustainable water resource management.

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