Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Ecological Regions versus Hydrologic Units: Frameworks for Managing Water Quality.
Author Omernik, J. M. ; Griffith., G. E. ;
CORP Author Corvallis Environmental Research Lab., OR. ;NSI Technology Services Corp., Corvallis, OR. Environmental Research Lab.
Publisher c1991
Year Published 1991
Report Number EPA/600/J-92/095;
Stock Number PB92-153873
Additional Subjects Water quality management ; Ecology ; Water pollution effects ; Regional analysis ; Spatial distribution ; Hydrology ; Environmental impact assessments ; Comparison ; Nonpoint sources ; Clean Water Act ; Pollution laws ; Water pollution control ; Reprints ;
Library Call Number Additional Info Location Last
NTIS  PB92-153873 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 08/28/1992
Collation 8p
In the mid-1970s a flurry of research and assessment activity began on nonpoint source (NPS) pollution. Much of the activity was driven by legislative requirements, particularly Section 208 of the Clean Water Act which required states to identify nonpoint sources of pollution and develop feasible procedures and methods to control these sources. Unfortunately, response to the law was piecemeal--most states lacked a logical and useful spatial (geographical) framework to put the results in a meaningful environmental perspective. Spatial frameworks can have a profound influence on the effectiveness of the research, assessment, and management of many aquatic resource problems, particularly nonpoint source pollution. The authors believe that spatial frameworks based on ecological regions can often be more useful for assessing the health of aquatic systems than frameworks based only on hydrologic units, drainage basins, or administrative or political units. Their objective is to demonstrate the usefulness of the frameworks and approaches, and show the relative ineffectiveness of hydrologic units with examples at national, regional, and local scales.