chapter 1 historical perspective of water use and development
TRANSCRIPT
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Chapter 1
Historical Perspective of Water Use and Development
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Chapter Headings
• Drinking Water for Early Civilizations
• Early Irrigation and Flood-Control Projects
• Early Water Transportation Development
• Early Hydropower Development
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What is Civilization?
• For civilization to emerge you need– Agriculture– Cities– “Leisure time” to develop skilled workers
• Among the key features are– Ability to manage water– Suitable soil and climate for agriculture
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Managing Water Resources
• Even in the earliest civilizations we can find evidence of water management– Delivery of drinking water to cities using
qanats and aqueducts– Routing of wastewater out of cities– Delivery of water for agriculture through
irrigation– Transportation– Hydropower
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Drinking Water for Early Civilizations
• Earliest civilization centers emerged in:– Mesopotamia along the Tigris and Euphrates
Rivers (Iraq)– Indus River (Pakistan)– Yangtze River (China)– Nile River (Egypt)– Greek and Roman empires (Mediterranean)
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Figure 1.1
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Qanats
• Qanat system developed in Mesopotamia area– From a Semitic word meaning “to dig”– Semitic: subfamily of Afro-Asiatic language
family that includes Hebrew and Arabic
• Delivered ground water by gravity from an upland area where it was plentiful to lowland agricultural areas and cities
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• Qanat shafts served 3 purposes– Air supply– Remove soil and rock– Keep tunnels from being
too long
• http://www.livius.org/q/qanat/qanat.html
Outlet
Aerial photo showing collapsed shafts
View down a shaft to water below
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Aqueducts
• Roman empire developed an extensive system of aqueducts to deliver surface water by gravity to cities
• Water was delivered to fountains and baths where citizens collected and used it
• Allowed cities to grow in size• Reduced amount of time that individuals
(usually women) spent obtaining daily water
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Women at a stream collecting water to carry to their village in Cameroon
UNESCO www.wateryear2003.org
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Aqueduct in Segovia, Spain
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Roman public fountain
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Roman public bath at Pompei, Italy
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Coaca Maxima (main sewer) for ancient RomeExample of routing wastewater away from citieshttp://courses.washington.edu/tande/urb/
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Wind Gap Pumping Plant, Tehachapi Range north of LACalifornia Aqueduct
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Drinking Water Today
• Supplying drinking water is still an important function today
• Many problems– Water quality (bacteria, carcinogens, heavy
metals, etc.)– Water quantity (competition with agricultural
for water)
• We’ll discuss these in later chapters
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Chapter Headings
• Drinking Water for Early Civilizations
• Early Irrigation and Flood-Control Projects
• Early Water Transportation Development
• Early Hydropower Development
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Early Irrigation and Flood Control
• Civilization centers developed where soils were fertile
• For soils to be fertile nutrients must be collected and deposited in an area so that they become concentrated– Flooding deposits rich mountain (volcanic)
soils in river floodplains– Glaciers deposit rich topsoils at their terminus
and in wind blown loess
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Early Irrigation and Flood Control
• Floodplains are often in dry areas that require irrigation
• Nile River civilization is a good example– Sediments from the mountains of Ethiopia and
Sudan are deposited in the floodplains of Egypt
– Ancient Egyptians developed an elaborate irrigation system for Nile floodplain
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From Chapter 3
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Simple devices for lifting water from the river into irrigation canals:shadoufs, tambour or Achimedes screw, and saqia water wheel
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Early Irrigation in the U.S.
• Anasazi Indians developed irrigation systems in Southwest desert region around 950 AD
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Anasazi dwellings at Pueblo Bonito, Chaco Canyon, NM
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R.G. Vivian, Chaco Canyon Handbook
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Chaco Canyon irrigation
R.G. Vivian, Chaco Canyon Handbook
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Early Irrigation in the U.S.
• Brigham Young and Mormon followers began extensive irrigation system in Salt Lake Valley of Utah in 1847
• Region receives 15 in of annual rainfall• Constructed diversion dams across rivers and
diverted water into irrigation ditches– Small diversion dams were made of logs, rocks and
brush– Irrigation ditches were made using horse-drawn plows
and hand digging
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Early Irrigation in the U.S.
• Construction of an irrigation ditch was not simple– A ditch too steep would cause fast flow that
would erode the ditch and wash it out– A ditch that was too flat would not move water
• Rule of thumb was a fall of about 2 feet per mile
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Early Irrigation in the U.S.
• Homestead Act passed in 1862– Opened the floodgates of development in the
West– Anyone over the age of 21 could acquire
ownership of 160 acres if• Lived on it for 5 years• Made improvements to the property
– Cost was $1.25 per acre
• Water for irrigation became a critical issue
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Sears, Roebuck & Co. sold windmills to pump groundwater
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Early Irrigation in the U.S.
• In 1870’s Horace Greeley, editor of NY Tribune promoted settlement in the West with the phrase “Go West, Young Man”
• Time was ripe for western migration– Civil War ended in 1865– Transcontinental railroad completed in 1869
• Organized a settlement in Colorado (today called Greeley) to replicate the irrigation successes of Mormons in Utah
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Early Irrigation in the U.S.
• Late 1800’s was a period of unusually wet weather in West
• As normal rainfall returned many settlers without irrigation water were forced to abandon their land and move into town to work in other professions
• Drought period in 1930’s forced more settlers to abandon land and become migrant workers– Described in “Grapes of Wrath” by John Steinbeck
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Central Arizona Irrigation Project
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Irrigation Today
• Irrigation today is extensive in western U.S. and other areas of the world
• A number of associated problems– Competition for water with urban sources– Salinization of soils– Sedimentation of reservoirs– Effect on stream flow and water quality
• Will discuss these in later chapters
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Chapter Headings
• Drinking Water for Early Civilizations
• Early Irrigation and Flood-Control Projects
• Early Water Transportation Development
• Early Hydropower Development
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Early Transportation Development
• One of the reasons civilization centers developed near rivers is these were the “interstates”
• River and canal systems used for boat traffic
• Nile and Yangtze River are examples
• Later extensive canal system developed in Europe
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Lock and lockkeeper’s house, Castlefield, England
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Early Transportation Development
• Erie Canal constructed 1817-1825– Connected Buffalo on Lake Erie to Albany on
Hudson River– 363 miles– Cut travel time from 20 days to 6 days– Cut transportation costs from $100 to $5/ton
• Ohio & Erie Canal connected Ohio River to Lake Erie
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Check Google map to see full extent of St. Lawrence Riverhttp://www.google.com/maphp?hl=en&tab=wl&q=
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Canal boat pulled by mule on towpath on the C &O canalIn Washington DC; canal ran 184 miles from Cumberland MD to DC
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Miraflores Lock, Panama Canal (“mules” on tracks)
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Early Transportation Development
• Mississippi River has been through history and continues to be a major transportation system for U.S.
• Before steamboats keelboats and flatboats were used to move produce down river
• After steamboats developed (1810) traffic ran up and downstream
• Army Corps of Engineers responsible for clearing snags
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Jolly Flatboat men, George Caleb Bingham
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Water Transport Today
• Water transportation not as critical today due to rail and trucking industries
• Still a source of conflict– Navigational needs vs. urban and agricultural use of
water– In 2003 Corp of Engineers released water from Lake
Lanier and lower lakes on Chattahooche to float barge traffic at Columbus
– Later that year drought conditions caused record low lake levels
• We’ll discuss this in later chapters
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Chapter Headings
• Drinking Water for Early Civilizations
• Early Irrigation and Flood-Control Projects
• Early Water Transportation Development
• Early Hydropower Development
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Early Hydropower Development
• Water wheels were used to grind grain as early as 100 BC in Greece
• Until the time of steam engines, water mills were a major source of energy
• By 1800 there were 500,000 water mills in Europe
• Mills ground corn and wheat, powered bellows and hammers to make iron, ground ingredients for paper, cut wood, and powered textile mills
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Rock Run Grist Mill, Susquehanna State Park, MDovershot mill for grinding corn
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Grist mill
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Bottom millstone exposed
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Walter and Merrits. 2008. Science. Page 299
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Littleton Mill undershot wheel, Littleton, NH
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Textile mill diagram
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Early Hydropower Development
• With the invention of the light bulb by Thomas Edison in 1879 hydropower began to be used to generate electricity
• One of the first generating plants was built at Niagara Falls to supply electricity to Buffalo NY– Designed by George Westinghouse
• Hydropower production peaked in the 1940’s when it provided 1/3 of electricity consumed in U.S.
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Niagara Falls
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Niagara Falls (right) and American Falls (left)Hydroelectric plant was to the left of American Falls?
http://en.wikipedia.org/wiki/Niagara_Falls
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Two inlets above the fall diverted water into canals (right photo # 1 & 2); water flowed down canals to power houses (left diagram)
http://ublib.buffalo.edu/libraries/exhibits/panam/sel/electricity.html
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George Westinghouse, 1846-1914
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Westinghouse turbine, 1925
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Hoover Dam generators
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Hydropower Today
• Hydropower is still important but ability to transmit electricity is making some dams less critical
• Movement to remove dams in some cases
• Focus on environmental impact of dams on fish such as salmon
• We’ll discuss this in later chapters
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Chapter 1 Summary
• Management of water resources has been a hallmark of civilizations throughout history
• Water managed to provide drinking water, irrigation, flood control, navigation, and power
• Although we’ve been managing water for centuries, many old and new problems now confront us