||Potential for nutrient loadings from septic systems to ground and surface water resources and the Chesapeake Bay
Maizel, Margaret Stewart ;
Muehlbach, G. ;
Baynham, P. ;
Zoerkler, J. ;
||Environmental Protection Agency, Annapolis, MD. Chesapeake Bay Program. ;Chesapeake Research Consortium, Inc., Annapolis, MD.
||Chesapeake Bay Program, U.S. Environmental Protection Agency,
||EPA 903-R-97-006 ; CBP/TRS 166/97
Nutrient pollution of water--Chesapeake Bay (Md. and Va.) ;
Nitrogen--Chesapeake Bay (Md. and Va.) ;
Phosphorus--Chesapeake Bay (Md. and Va.) ;
Septic systems ;
Chesapeake Bay (Md. and Va.)
Chesapeake Bay ;
Organic loading ;
Septic tanks ;
Sewage disposal ;
Water pollution sources ;
Waste disposal ;
Ground water ;
Sewage lagoons ;
Surface waters ;
Loading rate ;
||Env Science Center Library/Ft Meade,MD
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||280 p. : ill., maps ; 28 cm.
NCRI Chesapeake, Inc., studied population and physical data of the Chesapeake watershed to determine the potential contribution of nitrogen loadings from septic systems to contaminate ground water, surface water and the bay. Four new technical approaches were used in developing a GIS-based system to link population data to three housing types (urban, rural, farm) and three means of waste disposal (septic, sewer, other means of waste disposal): (1) 1990 Census Block Group data was used to estimate populations by housing type waste disposal means (2) STATSGO, karst and geologic data was used to characterize soils by septic limitations; (3) physiographic data was used to describe regions where soils are potentially vulnerable to ground and surface water contamination; and (4) an hierarchical approach aggregating the block group/STATSGO intersections to county, model segment, state and entire watershed areas was used to spatially account for associated resource effects of human populations in the environment.
"April 1997." "EPA 903-R-97-006." "CBP/TRS 166/97." Includes bibliographical references.