Scientific Investigations Report 2008–5168
U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2008–5168
Table 2. Lake characteristics for selection of limnological sampling times at five pelagic stations in Coeur d’Alene Lake, Idaho, water years 2004–06.
[Lake characteristics: Related to hydrodynamics, nutrients and productivity, fate and transport of trace elements]
| Month | Sample collection | Lake characteristics |
|---|---|---|
| October (mid-month) |
Yes | Weakening stratification, drawdown cycle, decreased productivity, maximum dissolved oxygen depletion, increased hypolimnion storage of trace elements. |
| November (late month) |
Yes | Water-column circulation, stable pool, low productivity, dissolved oxygen replenishment, circulation of nutrients and trace elements. |
| December | No | Similar to November, but cooler temperatures. |
| January (late month) |
Yes | Inverse stratification, stable pool, low productivity, dissolved oxygen replenishment, circulation of nutrients and trace elements, follows several months of zinc-rich inflows from Coeur d’Alene River. |
| February | No | Similar to January, but rain-on-snow events may have raised elevation and input nutrients and trace elements. |
| March | No | Similar to February. |
| April (mid-month) |
Yes | Pre-snowmelt runoff conditions, assess distribution of dissolved oxygen, nutrients, and trace elements at end of winter conditions. |
| May (peak of runoff) |
Yes | Fill cycle from snowmelt runoff, early stratification, increased productivity if not too turbid, assess distribution of dissolved oxygen, nutrients, and trace elements as affected by snowmelt runoff and water-column circulation. |
| June (mid-month) |
Yes | Thermally stratified, stable summer pool, increasing productivity, start of dissolved oxygen depletion, increased stratification of nutrients and trace elements. |
| July (mid-month) |
Yes | Similar to June, but stronger stratification and dissolved oxygen depletion. |
| August (mid-month) |
Yes | Similar to July. |
| September | No | Similar to August but start of drawdown cycle. |
U.S. Department of the Interior | U.S. Geological Survey
URL: http://pubs.usgs.gov/sir/2008/5168
Page Contact Information: Publications Team
Page Last Modified: Thursday, 10-Jan-2013 18:55:32 EST
