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Water quality in the Trinity River basin, Texas, 1992-95

January 1, 1999

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.

Publication Year 1999
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