Chapter 13 Water: A Limited Resource. Importance of Water  Cooking & washing  Agriculture  Manufacturing  Mining  Energy production  Waste disposal.

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Presentation transcript:

Chapter 13 Water: A Limited Resource

Importance of Water  Cooking & washing  Agriculture  Manufacturing  Mining  Energy production  Waste disposal  Use of freshwater is increasing

Properties of Water H bonds

Distribution of Water on Earth

Freshwater Aquifer

Watershed  A watershed is the area of land where all of the water that is under it or drains off of it goes into the same place

Too Much Water  Flooding  Both natural and human-induced  Modern floods are highly destructive  Humans have removed water-absorbing plant cover from soil-drained wetlands  building on floodplains

Urban vs. Pre-Urban Floodplains

Floods of Summer 2008

Too Little Water  Problems  Drought  Overdrawing water for irrigation for irrigation  Aquifer depletion  Subsidence  Sinkholes

Too Little Water  Problems (continued)  Saltwater Intrusion

Water Problems In US and Canada  US has a plentiful supply of freshwater  Many areas have a severe shortages

 Water shortages in West and Southwest Water Problems In US and Canada

Water Problems in US and Canada- Surface Water  Mono Lake (Eastern CA)  Colorado River Basin

Water Problems in US and Canada—Groundwater  Aquifer Depletion

Global Water Problems  Amount of freshwater on planet CAN meet human needs  BUT, it is unevenly distributed  Problems:  Climate Change  Drinking Water  Population Growth  Sharing Water Resources Among Countries

Global Water Problems  Drinking Water Problems  Many developing countries have insufficient water to meet drinking and household needs  Population Growth  Increase in population means __________  Limits drinking water available  Limits water available for agriculture (food)

 Sharing Water Resources Among Countries  Rhine River Basin  Potentially Volatile International Water Situations  Jordan River  Nile River Global Water Problems

Water Management  Main Goal: Provide sustainable supply of high-quality water 1. Dams and Reservoirs 2. Water Diversion Projects 3. Desalinization

Dams and Reservoirs  Benefits:  year-round supply of water  Electricity  Recreational activities  Disadvantages  Alter the ecosystem  Reduce sediment load Amazon Watch

Dams and Reservoirs  Glen Canyon Dam  Regulated flow has changed ecosystem

Dams and Reservoirs

Water Diversion Projects

Water Conservation 1. Reducing Agricultural Water Waste 2. Reducing Industrial Water Waste 3. Reducing Municipal Water Waste

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