Explanation:
The intensity of rainfall refers to the amount of rainfall that occurs in a specific time period. It is typically measured in millimeters per hour. The intensity of rainfall is influenced by various factors, including the duration of rainfall.

DURATION OF RAINFALL:
The duration of rainfall refers to the length of time that rainfall occurs. It can vary from a few minutes to several hours or even days. The duration of rainfall is an important factor in determining the intensity of rainfall.

RELATION BETWEEN DURATION AND INTENSITY:
The relationship between the duration of rainfall and the intensity of rainfall can be understood as follows:

1. Shorter Duration: When the duration of rainfall is shorter, it means that the rainfall occurs over a shorter period of time. In this case, the same amount of rainfall is concentrated in a shorter time period, resulting in a higher intensity of rainfall. Therefore, when the duration of rainfall is shorter, the rainfall intensity is greater.

2. Longer Duration: Conversely, when the duration of rainfall is longer, it means that the rainfall occurs over a longer period of time. In this case, the same amount of rainfall is spread out over a longer time period, resulting in a lower intensity of rainfall. Therefore, when the duration of rainfall is longer, the rainfall intensity is lower.

EXAMPLE:
To further illustrate this relationship, consider the following example: If 10 millimeters of rainfall occurs over a duration of 1 hour, the intensity of rainfall would be 10 millimeters per hour. However, if the same amount of rainfall occurs over a duration of 30 minutes, the intensity of rainfall would be 20 millimeters per hour.

This example demonstrates that when the duration of rainfall is shorter, the same amount of rainfall is concentrated in a shorter time period, resulting in a higher intensity of rainfall.