Behavioral modeling in hydrology is like using our brain to predict what is going to happen when it rains or when there is a lot of water in a river or a lake. Just like we know that we need to wear a raincoat and carry an umbrella when it is going to rain, scientists who study hydrology use behavioral modeling to predict what will happen to the water in a river or a lake when it rains a lot.
To do this, these scientists use information about how the water has behaved in the past when there were similar amounts of rain. They try to find patterns in the way the water has moved and behaved, and use these patterns to predict what will happen in the future when there are new conditions.
Think of it like playing with blocks. If you have played with certain types of blocks many times before, you know what shapes you can make with them and how they fit together. Scientists who study hydrology do the same thing with water - they try to understand how it behaves based on its past behaviors.
By studying and predicting how the water in rivers and lakes will behave in the future, scientists can help people prepare for potential flooding, ensure that there is enough water for things like agriculture and drinking, and protect the environment around bodies of water.