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“ In the wake of burgeoning populations, water development is currently being driven beyond the absolute limits of guaranteeable supplies and past the point of long-term sustainable livelihoods, thus, preparing the ground for future crises throughout the world.” - PowerPoint PPT Presentation
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“ In the wake of burgeoning populations, water development
is currently being driven beyond the absolute limits of
guaranteeable supplies and past the point of long-term sustainable
livelihoods, thus, preparing the ground for future crises throughout
the world.”
(Water Management in Desert Environments, Bruce Roberts)
Overview of Presentation
A. Hydrological ConceptsB. Tucson Geography and HydrologyC. Population Change in TucsonD. Tucson’s Economic BaseE. Water Consumption PatternsF. Water Management G. Other Politics H. Central Arizona ProjectI. Solutions?
Aquifer Structure
Surface Water
Groundwater
CAP Water
Water Supply
TucsonAMA
Population Transition
Tucson Population Growth, 1969-1996
0100000200000300000400000500000600000700000800000900000
per annum
Tucson’s
Economic Base
31 % Service Industry
23% Government
22% Trade
9% Manufacturing
6% Construction
4% TCPU
4% Fire
1% Mining
Municipal Groundwater Consumption1985 112,655 AF1990 123,165 AF1995 147,080 AF
Agricultural Groundwater Consumption1985 111,004 AF1990 89,815 AF 1995 95,379 AF
Industrial Groundwater Consumption1985 55,744 AF1990 47,974 AF1995 59,422 AF
Groundwater Consumption by Sector
Hydrological
Transitions
Effects of drop in water table:
• Reduced Inflow/Outflow
• Altered Inflow/Outflow Patterns
• Compaction of Aquifer (subsequent decrease in recharge)
• Land Subsidence
• Earth Fissures
Ecological
Transitions
Effects of drop in water table:
• Reduced Streamflow
• Drying stream beds
• Consequences for Riparian Habitats
• General vegetation die-off
• Desertification
Impacts on
Society
• Altered Inflow/Outflow Patterns : Effects on local wells
• Land Subsidence and Earth fissures: Damage to well casings, sewage systems, irrigation systems, building foundations.
• Increased salinization/TDS: Poorer water quality
• Problems associated with increased pumping lift
Economic
Transitions
• Residential Developers on the rise
• Environmental Technology on the rise
• Telecommunications Industry rising
• Agriculture Declining
Policy
Dynamics
Governing Bodies and Present Laws
• ADWR (vs. Pima County or Tucson Planning)
• Groundwater Code of 1980 (safe-yield by 2025)
• Proposition 200
Political
“Transitions”
As groundwater supplies run out:
• Increased number of governing bodies managing H20
• Increased number and activity of citizen groups
• Increased spending: management, education, technology and research, disputes (govt and legal)
• Increased tension among stakeholders
Groundwater Supply
PrivateCitizens
AgricultureMiningIndustry
OtherBusiness
Govt.Policy
Business Influence
Citizen Groups
Research & Technology
Population
Solutions?
• Find New Resources, Replenish Current Resources
• More Efficient Use of Resources
• Reduce Consumption