USGS

USGS ACF-NAWQA River Basin Study
Study Design

Water-Quality Assessment of the Apalachicola-Chattahoochee-Flint (ACF) River Basin, Georgia, Florida, and Alabama: Physical, Chemical, and Biological Data, 1992-1995

ACF Study Design

The goal of the ACF River basin study design was to integrate surface-water, ground-water, and biological components where possible so as to be able to document the current quality of the study area, to begin to describe the effects of predominant land uses on that quality, and to lay the foundation for future evaluation of the surface- and ground-water resources. The design focuses primarily on non-point source inputs of nutrients, sediment, and pesticides from agricultural, urban, and forested land uses.

Spacer GIF ACF Surface-Water Design
The surface water study design of the ACF River basin was stratified based on physiography and major land uses, and water quality monitoring locations were then chosen to represent predominent land uses at various scales. The monitoring network reflects a nested design starting with a few fixed monitoring sites (integrator sites and integrator sites) a subset of which were intensive monitoring sites, adding a group of comparison sites, and finally a group of sample sites on large tributaries and main stem rivers.

Site characteristics of surface-water sites sampled in the ACF

Spacer GIF ACF Ground-Water Design
The monitoring network for the ground-water component of the ACF River basin was designed primarily to provide information on occurrence and distribution of a large suite of compounds that can be used to better define problem areas, and questions and issues related to them. The ground-water sites include a combination of monitor and domestic wells, springs, seeps, and subsurface drains. These data are concentrated in the Metropolitan Atlanta area and in the agricultural areas in the coastal plain.

Site characteristics of ground-water sites sampled in the ACF

Spacer GIF Special Studies Design
The study design for the ACF River basin study was modified to include four special studies:
  1. Addition of an intensive network of synoptic sites within the poultry, urban and suburban basins.
  2. Analysis of sediment cores from six reservoirs within the study unit.
  3. Intensive sampling of the Flint River and several major tributaries during a period of record flooding.
  4. Seasonal sampling of fish to determine community recovery following the record flooding.

ACF main data page
ACF NAWQA home page
The URL for this page is http://ga.water.usgs.gov /nawqa/data.design.html
If you have questions or comments about this document contact wbhughes@usgs.gov
Last Modified: Thursday, 17-Jul-2008 11:11:06 EDT