impacts of land development on oregon’s waters 2001 this slide show was borrowed from the internet...
TRANSCRIPT
IMPACTS OF LAND DEVELOPMENT ON OREGON’S WATERS
2001
This slide show was borrowed from the internet but we added our own research when we presented it. It was originally from 2001 but we updated it to 2010.
Impacts
Understanding the problemImpacts of Land Development on Water
Quality
Looking at the whole watershed
Forestry
Urban development
Agriculture
Septic systems
Impacts
How does development pollute?
Impacts
Land development can cause…
Polluted water
Loss of fish and wildlife
habitat
Altered water flows
Impacts
Types of water pollution
Point source Industrial outflow
Non-point source “Polluted runoff” “Diffuse pollution” “Runoff pollution”
Impacts
Chemical components of pollution
Oil & grease contamination
Heavy metal contamination
Pesticide & herbicide contamination
Increased harmful bacteria
Increased nutrients
Increased oxygen demanding materials
Impacts
Physical components of pollution
Increased sediment input
Increased temperatures
Impacts
Impaired or destroyed fish and wildlife habitat
Changes in species diversity and abundance
Changes in physical structures
Photo Copyright Oregon Sea Grant 1999
Impacts
Aquatic habitat:
“Properly Functioning Conditions”
Temperature in natural range Enough dissolved oxygen Clear enough to see food and
breathe Clean enough for food web to
function Clean and complex enough
for spawning and rearing habitat
• Temperature in natural range• Enough dissolved oxygen• Clear enough to see food and
breathe• Clear enough for food web to
function• Clean and complex enough for
spawning and rearing habitat
Impacts
Altered water flows
Increased flood peaks
More frequent flooding
Lower dry weather flow
Loss of stream complexity
Center for Watershed Protection, Copyright 1999
Water balance
Impacts
Impervious surface cover as an indicator
– Rooftops
– Transport Systems• Parking lots• Streets• Sidewalks• Driveways• Cul de sacs
Impacts
Natural ground cover
Photo Copyright 1999, Center for Watershed Protection
Impacts
Where do we stand? Local impervious surface cover Local building trends Pollution problems Habitat loss
Impacts
Prevention is possible
Impacts
Prevention works:taking action locally
Limit impervious surface across the watershed
Treat stormwater Restrict high risk activities
in sensitive areas Create buffers around
streams, wetlands, and shore lands
Encourage tree preservation and native vegetation
University of Connecticut, NEMO
Impacts
Prevention Works:taking action locally
When someone builds on an area where you know it isn’t good to build on, what are the regulations
When someone builds on a buffer zone commissioners should approve
What are the consequences if you build on a sensitive area
Impacts
Prevention works:taking action nationally
National guidelines governing land development compared to local laws
General laws/guidelines
Impacts
Prevention works:taking action in our community
Reclamation-parking lots, grassy areas, pavement
Explore more earth friendly alternatives rather than concrete and roofs
Impacts
Prevention Works:taking action within our school Make a personal suggestion about our
own school Plant trees and buffers Community service where we replant
areas affected by fires or land development/deforestation