Larry F. Land 1995 <p>Assessment activities in the Trinity River Basin study unit of the National Water-Quality Assessment (NAWQA) Program began in October 1991 with 2 years dedicated to planning, analyzing existing information, and designing data-collection networks. In October 1993, a 3-year intensive data-collection program was initiated. Guidelines were provided by the NAWQA Program National Synthesis team, and suggestions for networks and surveys were made by the study unit&rsquo;s liaison committee. This fact sheet describes the data-collection activities.</p> application/pdf 10.3133/fs09095 en U.S. Geological Survey Water-quality assessment of the Trinity River Basin, Texas—Data collection, 1992–95 reports