Scientific Investigations Report 2006-5073
U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2006-5073
Table 4. Field measurements and concentrations of nutrients, organic carbon, and suspended-sediment collected at six sampling sites during spring, southern part of Hood Canal, Mason County, Washington, March 2004.
[Locations of sampling sites are shown in figure 1. Abbreviations: USGS, U.S. Geological Survey; mg/L, milligram per liter; µS/cm, microsiemen per centimeter at 25°C; °C, degrees Celsius; N, nitrogen; <, less than; –, not available]
Map No. | USGS site No. | Sample date |
Dissolved oxygen (mg/L) |
pH (standard units) |
Specific conductance (µS/cm) |
Water temperature (°C) |
Ammonia (mg/L as N) |
Nitrate plus nitrite (mg/L as N) |
Particulate-N (mg/L) |
---|---|---|---|---|---|---|---|---|---|
U1 | 12063520 | 03-18-04 | 11.0 | 7.8 | 98 | 9.9 | <0.04 | 0.28 | <0.02 |
SP2 | 12065010 | 03-18-04 | 12.0 | 7.7 | 56 | 8.6 | <.04 | .16 | <.02 |
SP3 | 12065100 | 03-25-04 | 11.3 | 7.4 | 55 | 8.0 | <.04 | .14 | .04 |
SP4 | 12062550 | 03-18-04 | 11.9 | 7.2 | 66 | 8.5 | <.04 | .12 | <.02 |
SP5 | 12062560 | 03-25-04 | 10.9 | 7.0 | 53 | 8.0 | <.04 | .4 | .02 |
T1 | 12068020 | 03-25-04 | 10.8 | 7.2 | 46 | 8.5 | <.04 | .11 | .02 |
Map No. | USGS site No. | Sample date |
Total nitrogen (mg/L) |
Total carbon, particulate (mg/L) |
Inorganic carbon, particulate (mg/L) |
Organic carbon, particulate (mg/L) |
Organic carbon, dissolved (mg/L) |
Suspended sediment (mg/L) |
---|---|---|---|---|---|---|---|---|
U1 | 12063520 | 03-18-04 | 0.33 | 0.2 | <0.1 | 0.2 | 2.5 | 4 |
SP2 | 12065010 | 03-18-04 | .21 | .4 | <.1 | .4 | – | 3 |
SP3 | 12065100 | 03-25-04 | .20 | .8 | <.1 | .7 | 2.9 | 8 |
SP4 | 12062550 | 03-18-04 | .16 | <.1 | <.1 | <.1 | 1.0 | 1 |
SP5 | 12062560 | 03-25-04 | .49 | .5 | <.1 | .5 | 3.3 | 7 |
T1 | 12068020 | 03-25-04 | .15 | .3 | <.1 | .3 | 1.7 | 9 |
For more information about USGS activities in Washington, visit the USGS Washington Water Science Center home page.