Water Our Water Resources March 4, 2009 Sanders

Homework Questions Why is fresh water considered a limited resource? What is groundwater, and why should we take care not to use it too quickly? Give two examples of things you can do to help conserve the world’s water supply. April 30, 2019 Unit 5: Water

Water, Water Everywhere… 70% of the Earth surface is covered by water. 97% of the water on the planet is salt water 77% of the freshwater on the planet is frozen April 30, 2019 Unit 5: Water

Surface Water Most large cities depend on surface water for their water supplies. Drinking Transportation April 30, 2019 Unit 5: Water

New York City Water Supply New York City's water supply system relies on a combination of tunnels, aqueducts and reservoirs to meet the daily needs of 8 million residents and countless visitors. Downhill flow allows the system to do without pumps. New York City's water supply system is one of the most extensive municipal systems in the world. This complex system relies on a combination of tunnels, aqueducts and reservoirs to meet the daily needs of 8 million residents and countless visitors. Thanks to well protected wilderness watersheds, New York's water treatment is simpler than in other American cities. Downhill flow allows the system to do without pumps. April 30, 2019 Unit 5: Water

New York City Water New York City's water treatment is simpler than in other American cities because of well protected wilderness watersheds. Kensico Dam, Valhalla, NY April 30, 2019 Unit 5: Water

Mississippi Watershed The Mississippi River is the second longest river in the United States, with a length of 2,340 miles from its source in Lake Itasca in Minnesota to its mouth in the Gulf of Mexico. The Mississippi River is part largest river system in North America and among the largest in the world The longest river in the United States is a Mississippi tributary, the Missouri River, measuring 2,540 miles. The Mississippi River is part of the Jefferson-Missouri-Mississippi river system, which is the largest river system in North America and among the largest in the world: by length (3,900 miles (6,300 km)), it is the fourth longest, and by its average discharge of 572,000 cu ft/s (16,200 m³/s), it is the tenth largest river. April 30, 2019 Unit 5: Water

Mississippi River Mississippi River runs from Minnesota to the Louisiana. Notice the meanders, curves, in the river. Part of the river’s cycle is to flood The Mississippi plain is some of the richest farmland anywhere. April 30, 2019 Unit 5: Water

Groundwater Not all of earth’s precipitation drains ff in rivers and streams. Water seeps into the ground and is called groundwater. Large areas of ground water is called an aquifer. April 30, 2019 Unit 5: Water

Solutions to Water Shortages The northeast of the United States has abundant water. Concern is for clean water Southwest United States settled in a desert. “Whiskey's for drinking, water’s for fighting over.” Old Arizona Saying April 30, 2019 Unit 5: Water

Desalination Removing salt from water is called desalination. This is for use in the American southwest. April 30, 2019 Unit 5: Water