Book 19, Question 20 · Video
Where Does a River’s Water Come From When It Hasn’t Rained for Days?
Many rivers are fed by groundwater, even when it hasn't rained for days! Groundwater soaks into the soil and rocks during rain and snowmelt. Then it slowly seeps out into streams.
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What Crafty Clover says in this video
Intro
Hi there, curious minds! I'm Crafty Clover! Let's discover something amazing. Where does a river’s water come from when it hasn’t rained for days?
The Big Idea
Many rivers are fed by groundwater, even when it hasn't rained for days! Groundwater soaks into the soil and rocks during rain and snowmelt. Then it slowly seeps out into streams.
Water Soaks In
Step one: water soaks in. During rain and snowmelt, some water sinks into the soil and the cracks in the rocks. It collects underground, in a layer called an aquifer.
Slow Seeping
Step two: slow seeping. The water slowly seeps out into streams, like a sponge being squeezed. This steady supply keeps rivers flowing between storms.
Other Helpers
Step three: other helpers. Wetlands, lakes, and snow banks also release their water slowly. They keep rivers going through the dry weeks.
A Closer Look
Let's take a closer look at groundwater! Rain soaks into the ground. Soil and rock hold the water like a giant sponge. It seeps out a little at a time. And the river keeps on flowing. That steady flow is the secret behind a river in dry weather, and it feeds the fish and plants too.
Quick Facts
Quick facts! Groundwater feeding a river is called baseflow. Wetlands, lakes, and snow banks release water slowly, too. That is why many rivers keep flowing in dry weeks. Stay with a grown-up near any river.
Think Like a Scientist
Now, think like a scientist! Soak a sponge in water and set it on a plate. Squeeze it gently and watch the slow drip. That is how the ground feeds a river. Squeeze harder or softer, and compare. You just made baseflow!
Outro
The ground feeds rivers all year long. Science is amazing! Crafty Clover can be found on Amazon Books, Google Bookstore, and Apple Books. Available for purchase or download! Bye for now!