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<br />t'~:~ <br /> <br />ABBREVIATIONS AND SYMBOLS <br /> <br />'~"" <br /> <br />~~ <br /> <br />"'iii <br /> <br />I <br />.:-~~.~,: <br /><'* <br />.~~ <br /> <br />~.:;.~. 't <br /> <br /> <br />.~ <br /> <br />f"'.' <br /> <br />~j <br />1I8.<.~ <br />*':~~ <br />~~l <br />f;~~ <br /> <br />k^:"'~" <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />I <br /> <br />'''<'it <br />~3~:i <br />;(;~p.~ <br />':",'-';' <br /> <br />~i~~g~ <br /> <br />These trace elements (except phosphorus) were analyzed for total, dissolved, <br />and suspended concentrations. <br /> <br />The location of each water-quality sampling site is shown in figure 1, <br />ahd a description of each site is given in table 1. Surface-water gaging <br />stations in the study area where both sediment and water-quality data were <br />already available are described in table 2. There are additional surface- <br />water gaging stations in the study area that are not listed in. table 2 or <br />shown in figure 1 because they record only streamflow. Many stations listed <br />in table 2 are on the main stem of the Yampa River or its principal tributary, <br />the Williams Fork. These stations are part of the long~term gaging network of <br />the U.S. Geological Survey. Many of the surface-water gaging stations on the <br />smaller tributaries in the study area were operated in cooperation withU.S; <br />Bureau of Land Management as part of the U.S. Geological Survey Coal Hydrology <br />Program. . <br /> <br />Data collected at the study sites are listed in table 3. Water-quality <br />constituents and properties determined from samples collected at U.S. Geo- <br />logical Survey surface-water gaging stations are listed in table 4. Data are <br />listed only for the same constituents collected at the study sites. Water- <br />quality data collected prior to water year 1976, and for additional water- <br />qualty constituents, are available for some of these stations and are pub- <br />lished annually in a series of the U.S. Geological Survey water-dats reports <br />entitled "Water Resources Data--Colorado." <br /> <br />A statistical summary of the constituents reported in tables 3 and 4 is <br />given in table 5. This table contains a summary for six surface-water gaging. <br />ststions located on the Yampa River, the Williams Fork, and Good .Springs. <br />Creek. Many samples were collected at these six stations; therefore, only a <br />summary of the data is given, which includes the number. of samples, the mean, <br />the standard deviation, and the range of each constituent for.the period of <br />record. The actual data are stored in WATSTORE, the U.S. Geological Survey's <br />national water data storage. and retrieval system. <br /> <br />The following abbreviations and symbols are used in tables 1 through 5. <br /> <br />OC is degrees Celsius; <br />E is estimated; <br />ft3/s is cubic feet per second; <br />~S/cm is microsiemens per centimeter; <br />mg/L is milligrams per liter;. <br />N is number of water-quality samples; <br />ND is not determined; <br />mi2 is square miles; and <br />ton/d is tons per day. <br /> <br />;,'''-,' <br /> <br />;~i~~~ <br /> <br />,'. <br /> <br />.~.. '- <br /> <br />" <br />" <br /> <br />',>,-,_."- <br />..,'.:(,. <br />~'-<: . '. <br /> <br />4 <br /> <br />