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WATER H2O

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WATER H2O Wastewater Treatment Water Treatment Water must be treated to remove elements and pathogens Removed elements Mercury, arsenic, & lead ... – PowerPoint PPT presentation

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Date added: 30 September 2019
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Title: WATER H2O


1
WATER H2O
2
Earths Water
3
Global Water Usage
4
Percent of Water Consumption
5
Surface Water
  • Definition Fresh water on the Earths land
    surface
  • Is found in lakes, rivers, streams, and wetlands
  • Types of surface waters are
  • River systems
  • Mississippi, Amazon, Nile
  • Water sheds
  • Definition area of land that is drained by a
    river
  • Example Mississippi Watershed

6
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7
Ground Water
  • Definition water stored beneath the Earths
    surface in sediment and rock formations
  • ? water travels beneath the Earths surface
    through rocks and soil to make a level called the
    WATER TABLE
  • Types of ground water
  • Aqufiers
  • The Recharge Zone
  • Wells

8
Aquifer
  • Definition An underground formation that
    contains ground water
  • Most consist of materials such as rock, sand, and
    gravel
  • Spaces where water can accumulate

9
Porosity and Permeability
  • Porosity
  • Definition the amount of space between the
    particles that make up a rock
  • Permeability
  • Definition the ability of rock or soil to allow
    water to flow through it
  • Examples Gravel
  • Impermeable clay or granite

10
___________________________
  • Definition the area of the Earths surface where
    water percolates down into the aquifer
  • They are environmentally sensitive (much like
    myself)
  • Can take a long time to refill aquifers
  • Buildings and parking lots can act as impermeable
    layers

11
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12
Wells
  • Not just for wishing, but more for
  • Definition A hole that is dug to reach ground
    water

13
Water Pollution
14
Types of water pollution
  • ________________________________
  • Pollution discharged from a single source
  • Examples
  • Septic Tanks
  • Landfills
  • Water Discharged by Industry
  • Underground Storage Tanks
  • Active Mines
  • Waste Water Treatment Plants

15
Acid Mine Drainage
16
Biological
17
Types of Water Pollution
  • ________________________________
  • Pollution that comes from many sources and can be
    difficult to identify
  • 96 of all polluted water comes from non-point
    sources
  • Examples
  • Water Runoff
  • Pesticides
  • Herbicides
  • Fertilizer
  • Farmland
  • Construction Sites
  • Water Crafts (like my old boat that stalled every
    time I went on the lake)

18
Point and Nonpoint Sources
19
_________________________
  • Eutrophication caused by humans
  • Steps
  • 1. Excess run-off
  • 2. Algal bloom
  • 3. Everyone is happy
  • (increase oxygen)
  • 4. Algae dies and decompose
  • 5. Decomposers steal all the oxygen

20
Pollution of Lakes
Eutrophication
21
Pollution of Streams
  • Oxygen sag curve
  • Factors influencing recovery

22
___________________________
  • Pollution in which the temperature of the body of
    water (lakes, streams) increases
  • This can occur when power plants or industry
    discharge warm water in a lake/river
  • Can cause death to many fish
  • __________________________________________________
    ________________________

23
Effects of Dissolved Oxygen
24
__________________________
  • Pollutants that percolate down into the earths
    surface
  • Can come from any surface water pollution or any
    leaking underground storage tanks
  • Very difficult to decontaminate because of large
    areas of rock that make up the aquifer
  • Pollution clings to the materials

25
Groundwater Pollution Causes
  • Low flow rates
  • Few bacteria
  • Low oxygen
  • Cold temperatures

Hazardous waste injection well
Pesticides
Coal strip mine runoff
De-icing road salt
Buried gasoline and solvent tank
Cesspool septic tank
Pumping well
Gasoline station
Waste lagoon
Water pumping well
Sewer
Landfill
Leakage from faulty casing
Accidental spills
Discharge
Unconfined freshwater aquifer
Confined aquifer
Confined freshwater aquifer
Groundwater flow
Fig. 22-9 p. 502
26
Groundwater Pollution Prevention
  • Monitor aquifers
  • Find less hazardous substitutes
  • Leak detection systems
  • Strictly regulating hazardous waste disposal
  • Store hazardous materials above ground

27
_______________________
  • Ships can LEGALLY dump waste water and garbage
    overboard (i.e. cruise ships)
  • BUT 85 of ocean pollution comes from activities
    on land
  • Oil Spills
  • About 37 million gallons of oil from tankers are
    released into the ocean each year

28
Oil Spills
  • Sources offshore wells, tankers, pipelines and
    storage tanks
  • Effects death of organisms, loss of animal
    insulation and buoyancy, smothering
  • Significant economic impacts
  • Mechanical cleanup methods skimmers and blotters
  • Chemical cleanup methods coagulants and
    dispersing agents

29
Ocean Pollution
Fig. 22-11 p. 504
30
Biomagnification
31
Case Study The Great Lakes
Fig. 22-8 p. 500
32
Case Study Chesapeake Bay
  • Largest US estuary
  • Relatively shallow
  • Slow flushing action to Atlantic
  • Major problems with dissolved O2

Fig. 22-13 p. 506
33
Drinking Water Quality
  • Purification of urban drinking water
  • Protection from terrorism
  • Purification of rural drinking water
  • Safe Drinking Water Act
  • Maximum contaminant levels (MCLs)
  • Bottled water

34
Wastewater Treatment
35
Water Treatment
  • Water must be treated to remove elements and
    pathogens
  • Removed elements
  • Mercury, arsenic, lead
  • ________________________
  • Safe to drink
  • ________________________
  • Organisms that can cause illness
  • Ex. Bacteria, viruses, protozoa, and parasitic
    worms

36
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