Okay, so imagine you are playing in a bathtub and you have a toy boat that you want to float. But when you fill the bathtub with water, your boat just sinks to the bottom. That's because the water is not draining properly.
Now, imagine a larger version of this bathtub called a city. Just like the toy boat, water needs to drain properly to prevent flooding in the streets and in people's homes. When people study how water drains in a city, we call this drainage research.
Drainage research is like playing detective. Scientists use special tools and equipment to look at how water flows and where it goes. They take pictures, measurements, and make computer models so they can understand how the water moves through the city.
This research helps us make changes to the way cities are designed so that water can flow better. It helps us make sure that our cities are safe and prepared for when it rains a lot.