water l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Water PowerPoint Presentation
Download Presentation
Water

Loading in 2 Seconds...

play fullscreen
1 / 41

Water - PowerPoint PPT Presentation


  • 236 Views
  • Uploaded on

Water Quantity and Quality What is Water Pollution? any physical (temperature, oxygen), chemical (mercury), or biological (disease, sewage) change to water that adversely effects its use by living things Cuyahoga River, Ohio

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Water' - Mia_John


Download Now An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
water

Water

Quantity and Quality

what is water pollution
What is Water Pollution?

any physical (temperature, oxygen), chemical (mercury), or biological (disease, sewage) change to water that adversely effects its use by living things

cuyahoga river ohio
Cuyahoga River, Ohio

Some river! Chocolate-brown, oily, bubbling with subsurface gases, it oozes rather than flows. "Anyone who falls into the Cuyahoga does not drown," Cleveland's citizens joke grimly. "He decays.” Time Magazine, August 1969

November 1952

types of water pollution
Types of Water Pollution

Measured in:

Percent (%)

Parts per thousand (‰)

Parts per million (ppm)

Parts per billion (ppb)

Biological

Chemical

Physical

biological water pollution
Biological Water Pollution

Direct (microbes in water):

Typhoid, cholera, dysentery, hepatitis…

Infectious Disease(Pathogens)

Oxygen-Demanding Waste

Entamoeba histolytica

biological water pollution7
Biological Water Pollution

Indirect

(Water breeding carriers):malaria, yellow fever,

west nile virus…

Infectious Disease(Pathogens)

Oxygen-Demanding Waste

Treehole mosquito

(carried La Crosse ensephalitis)

coliform test
Coliform Test

Detection:

  • Solutions:
  • Sewage treatment
  • Immunization
biological water pollution11
Biological Water Pollution

Infectious Disease(Pathogens)

Oxygen-Demanding Waste

dissolved oxygen
Dissolved Oxygen

Added by: turbulent water and photosynthesis

Removed by: Increased temperature (exsolution) and respiration/decomposition

Good: > 6 ppm (mosquitoes can survive in 1 ppm)(also measured in % of maximum - Good = 60-80%)

dissolved carbon dioxide
Dissolved Carbon Dioxide

Added by: respiration/decomposition & weathered rock

Removed by: Increased temperature (exsolution) and photosynthesis

Good: 1-10 ppm (usually about 1 ppm)

chemical water pollution
Chemical Water Pollution

Nutrients (Fertilizers)

Toxic Inorganic Materials

Persistent Organic Pollutants (POP’s)

Nitrogen, phosphorous

eutrophication
Eutrophication

& Blue Baby Syndrome

Dissolved inorganic nitrogen in Baltic Sea

nitrates
Nitrates
  • Typically: 0.1-4 ppm
  • Unpolluted usually below 1 ppm
  • Sewage pollution increase up to 20 ppm
chemical water pollution19
Chemical Water Pollution
  • Heavy metals
    • mercury,lead, tin…
  • Super Toxic Elements
    • Arsenic, selenium…
  • Acids, salts, chlorine
  • Radioactive Isotopes

Nutrients (Fertilizers)

Toxic Inorganic Materials

Persistent Organic Pollutants (POP’s)

some we will measure
Some We Will Measure
  • Copper
  • natural, fungicides, insecticides, copper pipes
  • can be lethal to some at 0.1 ppb, algae – 1-10 ppb, fish 500ppb
  • water standard 0.3 ppm
  • Acidity (pH)
  • 6.5-8.2 normal (rainwater is usually a little acidic)
  • >9 – harmful to fish (inc. salmon)
  • <5.5 releases metals in seds, bacteria die and organics don’t decay
  • <5 insects die and fish eggs don’t hatch
  • <4 lethal to adult salmon
some we will measure22
Some We Will Measure
  • Salinity
  • Saltwater 3.5%
  • Freshwater 1-500 ppm
  • usually >100 ppm is bad for freshwater organisms
  • >250 ppm tastes salty (max for drinking water)
  • Total Dissolved Solids
  • (Ca,Mg,Hco3, NH4, NO3, PO4, SO4, Na, Cl, Na, K)
  • from dissolved rock, fertilizer, urban runoff, irrigation, acid rainfall
  • “watchdog”– high numbers or rapid changes may indicate problem
  • typically 50-250 ppm
  • Drinking water must be below 500 ppm
chemical water pollution23
Chemical Water Pollution

Nutrients (Fertilizers)

Toxic Inorganic Materials

Persistent Organic Pollutants (POP’s)

physical water pollution
Physical Water Pollution

Sediment

Thermal Pollution

Solid Waste

Yellow River, China

Chattahoochee River, GA

measured in
Measured in:
  • NTU (Nephelometric Turbidity Units)
  • Normal levels: 1-50 NTU
  • Drinking Water: 0.5-1 NTU
  • Visible: >5 NTU
  • Higher during storms
physical water pollution28
Physical Water Pollution
  • Causes:
  • industry
  • dams
  • removal of vegetation

Sediment

Thermal Pollution

Solid Waste

Optimum – Fish 5-20°C (salmon <12°C)

physical water pollution29
Physical Water Pollution

Sediment

Thermal Pollution

Solid Waste

pollution sources point source
Pollution Sources:Point Source

Sewage pipes

Leaky gas tanks

Industrial sites

Injection wells

pollution sources nonpoint source
Pollution Sources:Nonpoint Source

Agriculture (soil, fertilizer,pesticides)

Urban runoff (from pavement)

Construction sites

Air Pollution

solutions
Solutions

Legislation

Source Reduction

Improved Land Use Practices

Remediation

Sewage Treatment

clean water act 1972
Clean Water Act 1972

Established water quality standards

System for ID’ing point sources

Pretreatment for industry

Federal funding for sewage treatment

Provided for enforcement

  • Worked well for point sources
  • Nonpoint sources still a problem
solutions35
Solutions

Remove lead from gasoline

Reduce road salting

Decrease erosion

Banning phosphates in detergents

Reduce fertilizer use, etc.

Legislation

Source Reduction

Improved Land Use Practices

Remediation

Sewage Treatment

solutions36
Solutions

Stormwater treatment

Reduce clearcutting

Preserve wetlands

Better construction practices

Legislation

Source Reduction

Improved Land Use Practices

Remediation

Sewage Treatment

solutions37
Solutions

Legislation

Source Reduction

Improved Land Use Practices

Remediation

Sewage Treatment

solutions38
Solutions

Legislation

Source Reduction

Improved Land Use Practices

Remediation

Sewage Treatment

Water hyacinths absorb arsenic

solutions39
Solutions

Legislation

Source Reduction

Improved Land Use Practices

Remediation

Sewage Treatment

West Point Treatment Plant, Seattle