Record Display for the EPA National Library Catalog

RECORD NUMBER: 92 OF 201

OLS Field Name OLS Field Data
Main Title Land Use Activities and Western Lake Superior Water Quality.
Author Johnston., C. A. ;
CORP Author Environmental Research Lab.-Duluth, MN.
Publisher 1990
Year Published 1990
Report Number EPA/600/D-90/065;
Stock Number PB90-246273
Additional Subjects Land use ; Water pollution abatement ; Water quality management ; Lake Superior ; Land development ; Surface water runoff ; Watersheds ; Drainage ; Computerized simulation ; Erosion ; Phosphorus ; Urban areas ; Sediments ; Reprints ; Nonpoint sources ; Land management ; Wetlands ; Tributaries
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB90-246273 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 12/03/1990
Collation 25p
Abstract
Geographic Information Systems (GIS), computer systems which can analyze mapped information, can help reduce nonpoint source pollution in the Lake Superior basin by providing researchers and managers with a tool for predicting the consequences of land use change. In an EPA-funded study of 15 watersheds in the Twin Cities metropolitan area, researchers at the Natural Resources GIS Laboratory (NRGIS) determined how wetlands and other land uses affected water quality. They found that wetlands were important to water quality at the watershed scale, so land use changes which would destroy wetlands could degrade downstream water quality. They also found that the position of the wetlands in the watershed made a difference as to how they affected downstream water quality, a relationship which would have been difficult to detect without the use of a GIS.