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50% of residents. Problems: Overdrafts Pollution (later). Groundwater Use and Supply (2). Figure 12.13. Water Uses (1). Offstream use: Removal or diversion from its SW or GW sources temporarily , e.g., irrigation, thermoelectric, industrial use

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Presentation Transcript
groundwater use and supply 2
Problems:

Overdrafts

Pollution (later)

Groundwater Use and Supply (2)

Figure 12.13

water uses 1
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)
trends in water use 2
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

water management 1
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?
significance of water
Significance of water
  • Hoover Dam/Lake Mead
  • Water to ImperialValley, LA
  • Power to CA, AZ, NV
multipurpose dam n s
Irrigation 48%

Electricity generation 36%

Water supply 36%

Flood control 39%

Recreation/fisheries 29%

Inland navigation 5%

Multipurpose Dam(n)s
the dead zone
The “Dead Zone”
  • Combination of BOD and fertilizer
breached waste ponds
Breached waste ponds
  • Hurricane Floyd
surface water pollution and treatment 1
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
gw treatment 3
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(?)
septic tank sewage disposal system
Septic Tank Sewage Disposal System
  • Who’s on septic?
    • I am!
    • I’m not.
    • I don’t know
  • Where’s the well?

Map view

Section view