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<br />3. Precipitation gage: Total daily rainfall (in,).
<br />4. Field parameters: Instantaneous streamflow
<br />(ft3/s), water temperature (oC), specific
<br />conductance (llS/cm). pH, barometric pressure
<br />(mm Hg), dissolved oxygen (mg/L). and
<br />turbidity (NTU).
<br />5. Major-ion concentrations: Calcium (mg/L),
<br />magnesium (mg/L), sodium (mg/L). potassium
<br />(mg/L), lab alkalinity (mg/L). hardness (mg/L).
<br />sulfate (mg/L), chloride (mg/L), fluoride (mg/L),
<br />silica (mg/L). and dissolved-solids residue
<br />(ROE) at 1800C (mg/L).
<br />6. Nutrient concentrations: Total ammonia plus
<br />organic nitrogen (mg/L), total phosphorus
<br />(mg/L), dissolved nitrite (mg/L), dissolved nitrite
<br />plus nitrate (mg/L). dissolved ammonia (mg/L),
<br />dissolved phosphorus (mg/L), and dissolved
<br />orthophosphate (mg/L).
<br />7. Trace-element concentrations: Aluminum (llg/L).
<br />antimony (llg/L), arsenic (llg/L), barium (llg/L),
<br />beryllium (llg/L), cadmium (llg/L), chromium
<br />(llg/L). cobalt (llg/L). copper (llg/L), iron (llg/L),
<br />lead (llg/L), manganese (llg/L), mercury (llg/L),
<br />molybdenum (llg/L), nickel (llg/L), selenium
<br />(llg/L), silver (llg/L), uranium (mg/L). and zinc
<br />(llg/L ).
<br />8. Gross organic concentrations: Total organic
<br />carbon (mg/L). dissolved organic carbon (mg/L),
<br />and oil and grease (mg/L).
<br />9. Trace-organic concentrations: Volatile organic
<br />compounds. semi-volatile organic compounds.
<br />10. Suspended sediment: Concentration (mg/L),
<br />percentage finer than 0.062-mm size
<br />analysis (%). and full particle-size analysis
<br />(% finer).
<br />II. Lake-bottom sediment: Selected trace-element,
<br />nutrient, and carbon concentrations; and
<br />chemical oxygen demand.
<br />
<br />Table 2. Stream monitoring stations
<br />
<br />12. Lakefield-parameter profile: Water temperature
<br />COC). specific conductance (llS/cm), pH, and
<br />dissolved oxygen (mg/L).
<br />13. Event-related water-quality samples: Streamflow,
<br />field parameters. and chemical-quality samples
<br />collected during rain or turbidity events.
<br />14. Biological samples: Macroinvertebrates and
<br />periphyton (algae).
<br />IS. Bulk atmospheric-deposition samples: Solids
<br />weight (mg), weight of residue (ROE) at
<br />1800C (mg), and weight of chloride (mg),
<br />phosphorus (mg), and trace elements (llg).
<br />
<br />METHODS OF DATA COLLECTION
<br />AND ANALYSIS
<br />
<br />Methods of data collection and analysis are
<br />standardized within the USGS. Therefore. these
<br />techniques and appropriate reference sources are
<br />discussed only briefly. Details of data collection by
<br />task from the work plan are described in the following
<br />sections.
<br />
<br />Stream Monitoring Stations
<br />
<br />The stream monitoring stations operated
<br />during water year 1995 are listed in table 2 and
<br />shown in figure 2. Stream stage. water temperature,
<br />specific conductance, turbidity, and precipitation
<br />were recorded every 15 minutes at five sites and
<br />transmitted every 4 hours by satellite to a computer
<br />data base. These data were used to compute values
<br />for continuous streamflow, water temperatore, specific
<br />conductance, and precipitation at the monitoring
<br />stations. Data from the turbidity sensor were inaccu-
<br />rate and are not reported.
<br />
<br />[ceo Clear Creek drainage; Ge. Geneva Creek drainage; identification number is USGS downstream order number; see figure 2 for station location]
<br />
<br />Site
<br />number
<br />CC5
<br />CC7
<br />CC9
<br />GC5
<br />GCll
<br />
<br />U.S. Geological Survey
<br />Identification number
<br />06714400
<br />06714600
<br />06714800
<br />06704500
<br />06705500
<br />
<br />Site
<br />name
<br />South Clear Creek above Lower Cabin Creek Reservoir near Georgetown, Colorado
<br />South Clear Creek above Leavenworth Creek near Georgetown, Colorado
<br />Leavenworth Creek at mouth near Georgetown, Colorado
<br />Duck Creek near Grant, Colorado
<br />Geneva Creek at Grant, Colorado
<br />
<br />6 Hydrologic and Water.Quan,y Data, Guanena Pa.. Area, Colorado, Water Year t995
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