Chapter 14 Water: A Limited Resource. Importance of Water Cooking & washing Agriculture ...
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Transcript of Chapter 14 Water: A Limited Resource. Importance of Water Cooking & washing Agriculture ...
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Chapter 14Chapter 14Water: A Limited ResourceWater: A Limited Resource
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Importance of WaterImportance of Water
Cooking & washingCooking & washing AgricultureAgriculture ManufacturingManufacturing MiningMining Energy productionEnergy production Waste disposalWaste disposal Use of freshwater Use of freshwater
is increasingis increasing
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Properties of WaterProperties of Water
H bonds
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Distribution of Water on Distribution of Water on EarthEarth
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Freshwater AquiferFreshwater Aquifer
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WatershedWatershed A watershed is the area of land A watershed is the area of land
where all of the water that is under it where all of the water that is under it or drains off of it goes into the same or drains off of it goes into the same placeplace
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Too Much WaterToo Much Water
FloodingFlooding Both natural and human-inducedBoth natural and human-induced
Modern floods are highly destructiveModern floods are highly destructive Humans have removed water-absorbing Humans have removed water-absorbing
plant cover from soil-drained wetlandsplant cover from soil-drained wetlands building on building on floodplainsfloodplains
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Urban vs. Pre-Urban Urban vs. Pre-Urban FloodplainsFloodplains
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Floods of Summer 2008Floods of Summer 2008
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Too Little WaterToo Little Water
ProblemsProblems DroughtDrought Overdrawing water Overdrawing water
for irrigation for irrigation Aquifer depletionAquifer depletion
SubsidenceSubsidence SinkholesSinkholes
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Too Little WaterToo Little Water
Problems (continued)Problems (continued) Saltwater IntrusionSaltwater Intrusion
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Water Problems In US and Water Problems In US and CanadaCanada
US has a US has a plentiful plentiful supply of supply of freshwaterfreshwater
Many areas Many areas have a have a severe severe shortagesshortages
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Water shortages in West and Water shortages in West and
SouthwestSouthwest
Water Problems In US and Water Problems In US and CanadaCanada
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Water Problems in US and Water Problems in US and Canada- Surface WaterCanada- Surface Water
Mono Lake (Eastern CA)Mono Lake (Eastern CA)
Colorado River BasinColorado River Basin
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Water Problems in US and Water Problems in US and Canada—GroundwaterCanada—Groundwater Aquifer DepletionAquifer Depletion
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Global Water ProblemsGlobal Water Problems
Amount of freshwater on planet CAN Amount of freshwater on planet CAN meet human needsmeet human needs BUT, it is unevenly distributed BUT, it is unevenly distributed Problems:Problems:
Climate ChangeClimate Change Drinking WaterDrinking Water Population GrowthPopulation Growth Sharing Water Resources Among CountriesSharing Water Resources Among Countries
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Global Water ProblemsGlobal Water Problems
Drinking Water ProblemsDrinking Water Problems Many developing countries have Many developing countries have
insufficient water to meet drinking and insufficient water to meet drinking and household needshousehold needs
Population GrowthPopulation Growth Increase in population means __________Increase in population means __________ Limits drinking water availableLimits drinking water available Limits water available for agriculture Limits water available for agriculture
(food)(food)
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Sharing Water Resources Among Sharing Water Resources Among CountriesCountries Rhine River Basin Rhine River Basin
Potentially Volatile International Water Potentially Volatile International Water SituationsSituations Jordan RiverJordan River Nile RiverNile River
Global Water ProblemsGlobal Water Problems
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Water ManagementWater Management
Main Goal: Provide sustainable Main Goal: Provide sustainable supply of high-quality watersupply of high-quality water1.1. Dams and ReservoirsDams and Reservoirs
2.2. Water Diversion ProjectsWater Diversion Projects
3.3. DesalinizationDesalinization
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Dams and ReservoirsDams and Reservoirs
Benefits:Benefits: year-round supply year-round supply
of waterof water ElectricityElectricity Recreational Recreational
activitiesactivities DisadvantagesDisadvantages
Alter the ecosystemAlter the ecosystem Reduce sediment Reduce sediment
loadloadAmazon Watch
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Dams and ReservoirsDams and Reservoirs
Glen Canyon DamGlen Canyon Dam Regulated flow has changed ecosystemRegulated flow has changed ecosystem
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Dams and ReservoirsDams and Reservoirs
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Water Diversion ProjectsWater Diversion Projects
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Water ConservationWater Conservation
1.1. Reducing Agricultural Water WasteReducing Agricultural Water Waste
2.2. Reducing Industrial Water WasteReducing Industrial Water Waste
3.3. Reducing Municipal Water WasteReducing Municipal Water Waste