A framework for biological criteria for Florida streams using benthic macroinvertebrates

MT Barbour, J Gerritsen, GE Griffith… - Journal of the North …, 1996 - journals.uchicago.edu
Our study developed an approach to biological assessment that would document effects of
pollution on benthic macroinvertebrate assemblages in Florida streams. The primary …

Ecoregions of the conterminous United States: evolution of a hierarchical spatial framework

JM Omernik, GE Griffith - Environmental management, 2014 - Springer
A map of ecological regions of the conterminous United States, first published in 1987, has
been greatly refined and expanded into a hierarchical spatial framework in response to user …

[HTML][HTML] Scenarios of land use and land cover change in the conterminous United States: Utilizing the special report on emission scenarios at ecoregional scales

…, RR Reker, CE Soulard, W Acevedo, GE Griffith… - Global Environmental …, 2012 - Elsevier
Global environmental change scenarios have typically provided projections of land use and
land cover for a relatively small number of regions or using a relatively coarse resolution …

Ecoregions and subregions of Iowa: a framework for water quality assessment and management

GE Griffith, JM Omernik, TF Wilton… - Journal of the Iowa …, 1994 - scholarworks.uni.edu
Ecoregion frameworks are valuable tools for inventorying and assessing environmental
resources, for setting resource management goals, and for developing biological criteria and …

[DOC][DOC] Ecoregions of California

GE Griffith, JM Omernik, DW Smith, TD Cook… - US Geological Survey …, 2016 - gaftp.epa.gov
Ecoregions denote areas of general similarity in ecosystems and in the type, quality, and
quantity of environmental resources. They are designed to serve as a spatial framework for the …

Ecological regions versus hydrologic units: frameworks for managing water quality

JM Omernik, GE Griffith - Journal of Soil and Water Conservation, 1991 - jswconline.org
IN the mid-1970s, a flurry of research and assessment activity began on nonpoint-source
pollution. Much of this activity was driven by legislative requirements, particularly Section 208 …

How misapplication of the hydrologic unit framework diminishes the meaning of watersheds

JM Omernik, GE Griffith, RM Hughes, JB Glover… - Environmental …, 2017 - Springer
Hydrologic units provide a convenient but problematic nationwide set of geographic
polygons based on subjectively determined subdivisions of land surface areas at several …

Ecoregions, watersheds, basins, and HUCs: how state and federal agencies frame water quality

GE Griffith, JM Omernik, AJ Woods - Journal of Soil and Water …, 1999 - jswconline.org
Many state and federal agencies have adopted a “watershed approach” for water quality
assessment and management, and the US Environmental Protection Agency (EPA) …

[BOOK][B] Ecoregions of North Carolina

GE Griffith, JM Omernik, J Comstock, MP Schafale… - 2002 - ecologicalregions.info
… These people were authors or collaborators of the multi-agency North and South
Carolina ecoregion poster published by the USGS (Griffith et al., 2002b). Thanks are also …

[PDF][PDF] Experimental investigation of the effects of plastic flow in a tension panel with a circular hole

GE Griffith - 1948 - ntrs.nasa.gov
Seven uniformly Mmepsioned 24S4 tension yane~ with a central. circuler hole were subjected
to various loads in order to study the effects of plastic flow at the petit of maxhiim stress …