Water quality in the Trinity River basin, Texas, 1992-95
Water quality in the Trinity River basin was studied during 1992-95 as part of the USGS National Water-Quality Assessment (NAWQA) Program. Studies included chemical sampling of streams, streambed sediments, biota, and ground water; measuring distributions of biological communities in streams; and measuring physical characteristics of streams that affect biological habitat. The sampling design, in general, relates water-quality conditions to causative human and natural environmental factors. The occurrence of pesticides, for example, is related to land use. Trends are mixed, with a substantial improvement in the diversity of fish species downstream from Dallas and large decreases in regulated contaminants such as DDT; but increases in unregulated contaminants such as polychlorinated biphenyls.
Citation Information
Publication Year | 1999 |
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Title | Water quality in the Trinity River basin, Texas, 1992-95 |
DOI | 10.3133/cir1171 |
Authors | Larry F. Land, J. Bruce Moring, Peter C. Van Metre, David C. Reutter, Barbara Mahler, Allison A. Shipp, Randy L. Ulery |
Publication Type | Report |
Publication Subtype | USGS Numbered Series |
Series Title | Circular |
Series Number | 1171 |
Index ID | cir1171 |
Record Source | USGS Publications Warehouse |
USGS Organization | Texas Water Science Center; Rocky Mountain Regional Office |