Okay, so imagine there's a big river near your house where you like to go fishing or swimming. You might see lots of different animals and plants living in the water and around it. But sometimes people might throw trash or chemicals into the river, and that's not good for the plants and animals or for people like you who want to use the river.
That's where the riverkeepers come in! They are like special helpers who make sure the river stays clean and healthy for everyone. They might do things like test the water to make sure it's safe, pick up trash and remove things that are blocking the flow of the river, or talk to people in the community about why it's important to take care of the river.
The riverkeepers usually work for an organization that focuses on protecting and preserving rivers and other bodies of water. They might also work with local government officials to make sure the laws and rules about protecting the river are being followed.
So in short, the riverkeepers are like superheroes who help keep the river healthy and clean, so we can all enjoy it!