Introduction to nonpoint-source pollution and wetland mitigation
Nonpoint source pollution (NPS) is the major cause of impairment of U.S. surface waters. Erosion from croplands has been declining but is not yet reflected in decreased sediment yield or phosphorus concentrations in the nation's rivers. Nitrogen pollution is of particular concern in eutophication of estuaries as a contaminant of groundwater, and as an acidifying agent in atmospheric deposition. Nitrogen fertilizer and emissions of nitrous oxides are major contributors to the problem. The outlook on pesticides is mixed: bans on organochlorine pesticides in the 1970s have resulted in decreasing concentrations in fish tissue; however, herbicides are now a problem for some surface and groundwater sources of drinking water, especially in the Upper Midwest.
- Research Organization:
- Minnesota Univ., St. Paul, MN (United States). Water Resources Research Center
- OSTI ID:
- 6914026
- Report Number(s):
- PB-93-106953/XAB
- Country of Publication:
- United States
- Language:
- English
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AQUATIC ECOSYSTEMS
CHALCOGENIDES
ECOLOGICAL CONCENTRATION
ECOSYSTEMS
ELEMENTS
ESTUARIES
EUTROPHICATION
FERTILIZERS
GROUND WATER
HERBICIDES
HYDROGEN COMPOUNDS
METALS
MONITORING
NITROGEN COMPOUNDS
NITROGEN OXIDES
NITROUS OXIDE
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PESTICIDES
PHOSPHORUS
POLLUTION
POLLUTION SOURCES
SURFACE WATERS
WATER
WATER POLLUTION
WETLANDS