Water in a Dry Valley

In the picture

1. 1Pale shoreline band: exposed rock shows a drop in stored water.
2. 2Concrete dam: a barrier that holds back river water.
3. 3Circular irrigated field: crops fed by water led from the river.
4. 4City pipeline: a channel carrying water to homes and businesses.
5. 5Cracked earth: dry ground beyond the watered fields.

Examples

• Two neighbours sharing a household well during a dry summer.
• A city drawing water from a river while farmers upstream use it for crops.

Quiz: Water in a Dry Valley (Age 15)

1. 1

   Why can freshwater be hard to manage in some places?

   • Because it is evenly distributed and supply always matches demand.
   • Because it is unevenly distributed and demand can exceed local supply.
   • Because farms and cities use very little water, so it is left unused.
2. 2

   What are common ways societies cope with limited freshwater?

   • Storing water, moving it, and limiting how much is used.
   • Making freshwater fall evenly across all areas.
   • Banning farms and cities from using water altogether.
3. 3

   Why do people build dams, pipelines, and irrigation systems?

   • To stop farms and cities from using river water.
   • To make freshwater spread evenly across the whole planet.
   • To store and share water that farms and cities need.

The answers, each with its explanation, are in the app. This lesson has left the free week, so its quiz is part of the subscription.