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Pacific Islands Water Science Center
ABOUT THE PACIFIC ISLANDS WSC
USGS IN YOUR STATE
USGS Water Science Centers are located in each state.
The Oahu National Water-Quality Assessment: Aquatic ecology
Island of Oahu showing location of ecological sampling sites, drainage areas, and land use (Hawaii State Office of Planning Land Use Districts, 2000).
The NAWQA study design for surface water focuses on water-quality conditions in streams using three interrelated components: water column studies, bed-sediment and tissue studies, and ecological studies.
Ecological studies are an integral part of the approach used by NAWQA to assess surface-water quality. The ecological studies are designed to assess the relations among physical, chemical, and biological characteristics of streams. Aquatic biological communities were surveyed at all three sites in the fixed-site network for water-column studies. These surveys were done along a delineated stream reach and include a habitat assessment of the site and a survey of the fish, algal, and benthic invertebrate communities. Six additional sites were surveyed to provide greater spatial coverage and to assess whether the biological communities at fixed sites are representative of streams throughout the study unit. Streamflow and water-quality data also were collected at the time of the ecological surveys.
A description of each site and available data can be found by selecting the site number on the map or stream name listed in the table below.
For More Information
If you have questions and comments related to the Oahu NAWQA study, contact:
Stephen Anthony (firstname.lastname@example.org)
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