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Book 19, Question 20 · Video

Where Does a River’s Water Come From When It Hasn’t Rained for Days?

Video · 1:54 · Crafty Clover explains, from A Million Whys Book 19

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!

Why I wrote this