- Definition of pollution-- The introduction of any physical phenomena, biological agent, or
- The source-pathway -sink concept shows how pollution moves through and affects our
- Ten categories of water pollution
- Sources of pollution--Where do contaminants come from?
- The Clean Water Act (1972) is to restore and maintain the chemical, physical,
- National Pollutant Discharge Elimination System (NPDES) is a federal program to control through
chemical substance that has an adverse impact on the aquatic system.
- Ecology is the science that studies the
interrelationships between living
organisms and the interactions between them and their environment.
We will be studying the ecology of lakes
environment
- Source = Mountains weather and
erode
Pathway = Rainfall carries sediment to streams leading to the lake
Sink = human population suffers catastrophic impacts including death, disease
- Biochemical Oxygen Demand (BOD)
= a measure of the amount of oxygen consumed
during biological and chemical processes that break down organic matter in water
Thermal pollution is big in Lake Norman
- Treated effluent from wastewater treatment
plants are point sources of pollution. See
NPDES map & handout for locations of treatment plants on Lake Norman
Untreated effluent from combined sewer
systems overflows (CSOs) during storms also
can be a point-source discharge.
non-point sources--atmospheric deposition,
leaching of landfills or waste deposits,
leaking underground storage tanks, runoff
from construction sites, mines, highways agricultural fields.
- and biological integrity of the nation's
waters
EPA has enforcement responsibilities for all discharges to navigable waters.
States are authorized to issue discharge
permits for waters not classified as navigable
- a permitting process liquid discharges
of commercial and industrial point sources.
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