Freshwater. Watershed River basin Drainage basin Catchment Total land area that drains surface water...
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Freshwater
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Watershed
River basinDrainage basinCatchment
Total land area that drains surface water to a common point.
Rain that falls anywhere within a given body of water's watershed or basin will eventually drain into that body of water.
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Overland Flow (Runoff)
Evaporation / transpiration
Aquifers/ groundwater
Soil Water
Fate of Precipitation to Land
Streams RiversLakes
SwampsOrganisms
Streams RiversLakes
SwampsOrganisms
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Where is all the Water?
Water sourcePercent of fresh water
Percent of total water
Oceans, Seas, & Bays -- 96.5
Ice caps, Glaciers, & Permafrost 69.6 1.79
Groundwater 30.1 1.7
Lakes 0.26 0.013
Soil Moisture 0.05 0.001
Atmosphere 0.04 0.001
Wetlands, Swamps 0.03 0.0008
Rivers 0.006 0.0002
Biological Water 0.003 0.0001
Source: USGS
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01E+142E+143E+144E+145E+146E+147E+148E+149E+141E+15
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ater
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Rivers
Resource
Water on Earth
0
5E+12
1E+13
2E+13
2E+13
3E+13
3E+13
acre
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ater
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ater
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Freshwater on Earth
01E+122E+123E+124E+125E+126E+127E+128E+129E+121E+13
acre
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ater
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Surfa
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Atmos
phere
Rivers
Resource
Liquid Water on Earth
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Freshwater
GroundwaterLakesSoils
WetlandsRivers
0.775% 0.8%
“Groundwater is the major source of water across much of the world, particularly in rural areas in arid and semi-arid regions”
UNESCO
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Water Demand
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The three major factors causing increasing waterdemand over the past century
•population growth•industrial development •expansion of irrigated agriculture.
Agriculture accounted for most freshwater withdrawal in developing economies in the past two decades
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Industrial Development: World Trade
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Agricultural Production
1 ton of grain requires 1000 tons of water
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Irrigation for crops uses 65- 70 percent of fresh supplies
It takes over 528 gallons of water to produce enough food for one person for one day
Industry uses 20-25 percent of available freshwatersteel, computers, and raw materials for industrial products
annual industrial water use in China could grow from52 billion tons to 269 billion tons within the next two decades
Personal use accounts for about ten percent of water use
each person needs at least 2 gallons of water a day for drinking, food preparation, and cooking
average consumption per person is five gallons a day (WHO, UNICEF), but in the U.S., Canada, and Western Europe the total
consumption rises dramatically
Over the past 30 years, the area of land under irrigation has increased by about 30%.
Overall Consumption
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Supply and Demand
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Groundwater Use
GroundwaterLakesSoils
WetlandsRivers
0.8%
IndiaChinaPakistan
½ the world’stotal use of groundwaterfor agriculture
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Shallow, Unconsolidated
North China Plain
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½ China’s wheat, 1/3 corn
Levels dropping 3 ft/year
Shift to Deep fossil aquifer (non-replenishable)
Agricultural well depths can exceed 1000 feet ($)
Municipal well depths can exceed 3000 feet
Shallow aquifer largely depleted (replenishable)
China’s grain production has fallen from its historical peak of 392 million tons in 1998 to an estimated 358 million tons in 2005
China largely covered the drop-off in production by drawing down its once vast stocks until 2004, at which point it imported 7 million tons of grain.
99,900 wells were abandoned
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India
21 million wells
water table is falling by 6 meters (20 feet) per year
falling water tables have dried up 95 percent of the wells owned by small farmers
drilling 1000m to reach water
agriculture is rain-fed and drinking water is trucked in
Population 1,132,446,000
Pakistan is growing by 3 million people per year,
In the Punjab plain, the drop in water tables appears to be similar to that in India. In the province of Baluchistan, water tables are falling by 3.5 meters per year. within 15 years Quetta will run out of water if the current consumption rate continues
PakistanQuetta
Punjab
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Cenomanian-Turonian Mountain Aquifer
recharged from the West Bank
highly permeable
Coastal Aquifer
Width between 3 and 20 km
chief resource of water for Gaza
depth to groundwater 60 m to 8 m
Israel
Gaza has the lowest per capitalwater availability in the world nextto Kuwait.
Besor
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80-100 sites lack infrastructure and mitigation measures
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1984 Saudi national survey reported fossil water reserves at 462 billion tons
½ has been depleted
irrigated agriculture could last for another decade
al-Disi aquifer
Sandstone aquifer not subject to recharge
Saudi Arabia
Partly in Jordan
Wheat on 2.5 million acres of desert
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The Sahara: Libya
1953
“fossil” water
Nubian Sandstone Aquifer
world's largest fossil-water reserve
located near the center of the world's largest continuous stretch of desert
two million square kilometers
equivalent to the flow of 200 years of water in the Nile River
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The Great Man-made River Project
the largest underground network of pipes in the world
1300 wells more than 500 m deep
6,500,000 m³ water/day
Tripoli, Benghazi, Sirt
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4 major basins
20,000km³
10,000km³
4,800km³
The Great Man-Made River Project
Water is 1/10 costOf desalinization
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United States
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United States 3,618,770 79,481 2.2%
Land (mi2) Water (mi2) % water
Rhode Island 1,545 500.6 32.4%
Florida 65,975 11,808 17.9%
North Carolina, Maine, Louisiana, Minnesota, Massachusetts
Driest?
New Mexico 121,593 243 0.2%
Arizona 114,000 364 0.32%
West Virginia 24,232 145 0.6%
Wettest
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Texas CaliforniaIdahoIllinois
CaliforniaTexasNebraskaArkansas
Surface 79% Ground 21%
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Groundwater
Surface water
#1 irrigation#2 public
#1 power#2 irrigation
Groundwater and Surface Water Use
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Surface Water
Groundwater
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Ogallala Aquifer
¾ of wheat tradedon the world market
1930s 600 wells1970s 200,000 wells
Water tables have fallenBy up to 100 ft
Unreplenished:
Pumping has declined by ½; new wells banned
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http://www.npr.org/templates/story/story.php?storyId=12595774
irrigated
Below is a link for a story on NPR
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Surface water 79% of withdrawalsGround water 21% of withdrawals
#1 use of groundwater is for irrigation#1 use of surface water is for power generation
Both ground and surface water withdrawals peaked in 1980
Texas uses the greatest amount of surface waterCalifornia uses the greatest amount of groundwater
Summary
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Florida
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20 Bgal/d
Withdrawn
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Florida’s Water
1700 rivers and streams (Feet to miles wide)
One of the most productiveAquifer systems in the world
27 of 78 1st magnitude (100 ft3/sec)springs nationally
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The Past
8 million acres>100 miles¼ mile per day
Too much water
The Everglades
35,000 people in 1830
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"The first and most abiding impression is the utter worthlessness to civilized man, in itspresent condition, of theentire region." Buckingham Smith
1835First Survey
In 1850, the Swamplands Act Passed
South Florida and the Everglades
50,000 acres were drained by 1881
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EAA
Historic Current
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The Present
16 million people withdrawing 20 billion gallons/day
Almost 30 M by 2030
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A/C: 1950sfirst mosquito control district: 1922DDT introduced: 1949Bureau of entomology: 1953
Population doubled between 1950 and 1970
Changes
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38% surface62%
ground
43% Public Supply39% Agriculture8.5% Industrial/Commercial4.5% Recreation Irrigation4.0% Domestic Self-supply
62% Agriculture20% Power8% Public Supply6% Recreation Irrigation4% Industrial/Commercial
Withdrawals
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Florida
# 11 in agricultural water use in the U.S.# 1 in agricultural water use in the East
Marion County has the greatest withdrawal for public self supply.
Greatest freshwater withdrawal: Palm Beach CountyGreatest groundwater withdrawal: Miami-Dade
½ of all agricultural self-supplied water withdrawal:
Palm BeachHendrySt. LucieIndian River
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yield estimated at 60 million gallons per day (mgd). The regional reservoir will cover about 1,100 acres and provide storage for approximately 15 billion gallons.
Desalinization
Reservoirs
The Future
Tampa’s Reverse Osmosis plant
Aquifer Storage and Recovery
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St. Petersburg Dual Distribution System – Highly treated reclaimed water is made available in a separate piping system for landscape irrigation, including the irrigation of more than 9,992 residential lawns, 61 schools, 111 parks, and 6 golf courses.
This is one of the most widely known reuse systems in the world. The system has been in operation since 1977. An average of about 17.7 mgd of reclaimed water was reused in 2003 to irrigate the spring training grounds of a major league baseball team, and in cooling towers at the Tropicana Dome.
Reclaimed Water
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Gainesville -- The City makes extensive use of reclaimed water from the 10-mgd Kanapaha treatment facility. In the Southwest Reuse Project, reclaimed water is used to irrigate residential lawns, golf courses, parks, and other landscaped areas. Reclaimed water is used for irrigation and in water features at the Kanapaha Botanical Gardens.
In addition, reclaimed water meeting drinking water standards recharges the Floridan Aquifer via deep wells. Approximately 2.2 mgd is used to irrigate golf courses, residential areas, and botanical gardens while 7.9 mgd of reclaimed water is used to recharge the ground water.
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Reedy Creek Utilities -- This utility provides reclaimed water for irrigation of landscaped areas within the Walt Disney World Resort Complex.
Tallahassee Spray Irrigation System -- Florida’s capital city irrigates over 2,200 acres with reclaimed water. Corn, soybeans, coastal Bermuda grass, and other feed and fodder crops are grown.
Orlando Wetlands -- Orlando created a 1,640-acre wetlands system using reclaimed water from the Iron Bridge advanced wastewater treatment facility.
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Pipelines?
Florida water managers are considering tapping rivers and lakes to quench the thirst of a growing populace.
A plan to pipe water from the Ocklawaha and St. Johns rivers and other water bodies to Central Florida communities is moving forward. The project could cost as much as $1.2 billion and pipe up to 262 million gallons a day to three dozen utilities including those serving Leesburg, Orlando and The Villages.
Conservation advocates say the plan defies the spirit of a state law requiring communities to use local water sources before turning elsewhere. They fear the plan is a prelude to water being pumped from the Santa Fe and Suwannee rivers to satisfy the explosive growth of southern Florida cities.
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