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Show * 26 Water Quality in the Great Salt Lake Basins, Utah, Idaho, and Wyoming, 1998- 2001 Study Component What data are collected and why Number and types of sites sampled Sampling frequency and period Stream Chemistry Streams and River:, Physical parameter* ( sireamflow. dissolved oxygen, pH. alkalinity, specific conductance, temperature), nutrients, majoi ions, organic carbon, and suspended sediment To measure how often and how much of a constituent is found, over time, yiven seasonal changes 01 land use and r'ahgeland, and mixed land use. : S:;: St; S::;^ ft^ runoff events October 199810 September 2000 Streams and Rivers, Intensive Sampling Same as above but sampled more frequently and fot pesticides and VOCs To measure how often and how much of a constituent is found, over time, given seasonal changes 01 land use Includes three of the above sites One site representing urban development, one site representing agriculture and one site lepresenting mixed, bm predominately urban land use 1999 to September 2000 . Urban Stiearn Study Physical parameters, trace elements, nutrients, and pesticides Used a bromide tracei to determine streamflow sources To measure how much a constituent concentration changes over the area due to different land- 01 chemical- use patterns Study done in Little Cottonwood Creek Bromide tracer was sampled at 97 sites, trace elements were sampled at 24 sites. - and nutrients and pesticides were sampled at 4 sites Once August 31 or September Agricultural Stream Study Physical parameters, nutrients, major ions ( July and August only), sediment. turbidity, and pe sticides mm collected at all sites) To measure how much a constituent concentration changes ovei the area due to different land- 01 chemical- use. patterns. Study conducted in the Bear Rivet drainage and included the main stem of the Bear River and tributaries of the Beai River Sixty- five sites were sampled kvice A 2- week period in March 2001 and a 2- week period in July/ August 2001 • Mining Stream Study Physical parameters, trace elements in water and sediment, and invertebrate Study conducted in the Park City/ uppei Webei Rivet area and community samples. To measure mining impacts on stream chemistry and the included 10 sites aquatic community . V •- ;: '. ; > -• . . • ' ' Twice March 2000 ( dissolved trace elements only) ami j July/ August 2000 ' Stream Ecology Ecological Studies Physical parameters, fish, macroinvertebtates, and algal communities, and habitat characteristics To describe the watet quality of streams by using species assemblages and to examine how they vary in relation to different Ten sues representing urban development, agriculture, forest and rangeland, and mixed land use ( same sites as in Streams and Rivers study component) Six sites were sampled once and foot sites weie sampled 3 consecutive years, July- August 1999- 2001 Flow- Regime Study Physical parameters and macroinvertebrate communities. To examine effects of hydrologic alterations on macroinvertebrate communities Fourteen sites along the main stem of the Bear River Sampled in August 2001 Bed- Sediment and Tissue Studies Physical parameters, pesticides, other synthetic organic compounds, and trace elements in stieambed sediment and in fish tissue To determine occurrence and distribution of potentially toxic compounds in sediment and fish tissue at Study was conducted at 19 sites Once Twelve rues were sampled during August- September 1998 Seven sites weie sampled during Jul./ 1999 Ground- Water Chemistry Shallow Ground Water Underlying Urban Areas in Salt Lake Valley Physical parameters, major ions, selected trace elements, pesticides, VOCs, nutrients, radon, and table isotopes Selected samples to estimate ground- watei ages using tritium helium- 3 andCFCs To examine how land use in an urban area affects the quality of ground water in recently recharged shallow aquifers. Installed 30 monitoring wells in the shallow ground- watei system underlying recently developed ( less than 30 years) residential and commercial areas in Salt Lake Valley, Utah. Sampled once in summei 1999 Basin- Fill Aquifers Study Physical parameters, majoi ions, selected trace elements, pesticide; VOCs, nutrients, radon, stable isotopes, and tritium To characterize the watei quality in the basin fill aquifers that arc most important for present and future use in the study area. Included 5b wells ( mostly used for domestic supply) in the recharge areas for the deeper basin- fill aquifers within the Great Salt Lake Basins. Sampled once during July- Novembei 1998 Ground- Water Flow- Path Study Physical parameters, major ions, selected trace elements, pesticides, VOCs, nutrients, radon, and stable isotopes. Selected samples to estimate groundwater ages using tritium, helium- 3, and CFCs. To characterize shallow groundwater quality in relation to ground- water flow in a residential area. Installed 11 monitoring wells along 2 hypothetical flow paths in residential areas in Salt Lake Valley, Utah. Sampled the monitoring wells, 6 nearby existing wells ( including 3 land- use study wells) and 1 nearby stream. Sampled 17 sites in spring 2000. Sampled or resampled 13 sites in fall 2000 Public- Supply Well Study Physical parameters, major ions, selected trace elements, pesticides, VOCs, nutrients, radon, stable isotopes, and methylene blue active substances Selected samples to estimate ground water ages using tritium, helium- 3, and CFCs. To characterize water quality in the principal aquifer used for public supply in an urban area. Included 31 public supply wells, 15 of which represent the largest producers in Salt Lake Valley, Utah. Sampled once during May- June 2001 Special Studies Land- Use Gradient Study Physical parameters, fish, macroinvertebrates, and algal communities, and habitat characteristics, nutrients, major ions ( duly sample only), and pesticides. To examine relations between varying levels of land- use intensity and water quality using biological, physical, and chemical responses. Sampled 1 to 3 sites on 13 streams and rivers along the western side of the Wasatch Mountains. A total of 28 sites were sampled. Twice during 2000, in spring and summer Trend Analysis from Sediment Cores Analyzed sediment cores for trace elements, selected organic compounds, and cesium- 137 ( for age dating). To reconstruct the history of contaminant flux from runoff and atmospheric deposition during the past several decades of urban and industrial growth. Sampled at three depositional sites along the western side of the Wasatch Mountains. Red Butte Reservoir, representing an undeveloped site, Farmington Bay, representing a mixed site, and Decker Lake, representing an urban site. Sampled once in 1998 |