50% of residents

1

• 50 of residents

2
Groundwater Use and Supply (2)

• Problems
• Overdrafts
• Pollution (later)

Figure 12.13
3
Water Uses (1)

• Offstream use Removal or diversion from its SW
  or GW sources temporarily, e.g., irrigation,
  thermoelectric, industrial use
• Consumptive use Type of offstream use of water
  without intermediate return to the SW or GW, such
  as transpiration and human use
• Instream use Navigation, fish and wildlife,
  recreational uses
• Water law
• Riparian (you touch it, you use it east of 100th
  meridian)
• Appropriation (first in time first in right
  arid/semiarid)

4
Trends in Water Use (2)

• So what do we do about it?
• Environmentalism
• Reduce
• Reuse
• Recycle
• New Environmentalism (Andy Posner, Huffington
  Post, 8/03/08)
• Invent
• Invest
• Implement

Figure 12.20
5
Water Management (1)

• Challenges for water management
• Increasing demand for water use (population and
  economic development)
• Water supply problems in semiarid and arid
  regions
• Water supply problems in megacities of humid
  regions
• Water traded as a commodity Capital, market, and
  regulations?

6
Management of the Colorado River (1)
7
Significance of water

• Hoover Dam/Lake Mead
• Water to ImperialValley, LA
• Power to CA, AZ, NV

8
http//www.hcn.org/
9
Multipurpose Dam(n)s

• Irrigation 48
• Electricity generation 36
• Water supply 36

• Flood control 39
• Recreation/fisheries 29
• Inland navigation 5

10
Water and Ecosystems
11
Emerging Global Water Shortage
12
WATER POLLUTION
13
Case History NC Bay of Pigs
14
Common Pollutants (1)
15
Common Pollutants (2)
16
Common Pollutants (3)
17
The Dead Zone

• Combination of BOD and fertilizer

18
Common Pollutants (4)
19
Common Pollutants (5)
20
Breached waste ponds

• Hurricane Floyd

21
Common Pollutants (6)
22
Common Pollutants (7)
23
Common Pollutants (8)
24
Surface Water Pollution and Treatment (1)

• Point sources of pollution
• Point sources are discrete, confined, and more
  readily identifiable
• Common sources Landfills, discharge from
  wastewater treatment plants, discharge from
  industries, power plants, storm water runoff,
  etc.
• Identify sources, on-site treatment
  andmitigation, prevention
• Bozeman area? Montana Superfund sites

25
Surface Water Pollution and Treatment (2)
26
Groundwater Pollution and Treatment (2)
27
GW Treatment (3)

• Extraction wells
• Pump-and-treat Bozeman solvent site
• Bioremediation
• Land-farming Gallagator Trail
• Vapor extraction Livingston Rebuild Site
• Let it clean itself(?)

28
Water Quality Standards
29
Wastewater Treatment
30
Septic Tank Sewage Disposal System

• Whos on septic?
• I am!
• Im not.
• I dont know
• Wheres the well?

Map view
Section view
31
Idealized Diagram for Wastewater Treatment Plant
32
Wetlands as WW-Treatment Sites
33
WW Renovation and Conservation Cycle
34
Applied and Critical Thinking Topics