Water quality of the Crescent River basin, Lake Clark National Park and Preserve, Alaska, 2003-2004
| Autor: | Robert T. Ourso, Timothy P. Brabets |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Hydrology
geography geography.geographical_feature_category urogenital system Limnology Drainage basin food and beverages Sediment STREAMS urologic and male genital diseases female genital diseases and pregnancy complications Water column parasitic diseases Water quality Turbidity Surface runoff Geology |
| Zdroj: | Scientific Investigations Report. |
| ISSN: | 2328-0328 |
| DOI: | 10.3133/sir20065151 |
| Popis: | The U.S. Geological Survey and the National Park Service conducted a water-quality investigation of the Crescent River Basin in Lake Clark National Park and Preserve from May 2003 through September 2004. The Crescent River Basin was studied because it has a productive sockeye salmon run that is important to the Cook Inlet commercial fishing industry. Water-quality, biology, and limnology characteristics were assessed. Glacier-fed streams that flow into Crescent Lake transport suspended sediment that is trapped by the lake. Suspended sediment concentrations from the Lake Fork Crescent River (the outlet stream of Crescent Lake) were less than 10 milligrams per liter, indicating a high trapping efficiency of Crescent Lake. The North Fork Crescent River transports suspended sediment throughout its course and provides most of the suspended sediment to the main stem of the Crescent River downstream from the confluence of the Lake Fork Crescent River. Three locations on Crescent Lake were profiled during the summer of 2004. Turbidity profiles indicate sediment plumes within the water column at various times during the summer. Turbidity values are higher in June, reflecting the glacier-fed runoff into the lake. Lower values of turbidity in August and September indicate a decrease of suspended sediment entering Crescent Lake. The water type throughout the Crescent River Basin is calcium bicarbonate. Concentrations of nutrients, major ions, and dissolved organic carbon are low. Alkalinity concentrations are generally less than 20 milligrams per liter, indicating a low buffering capacity of these waters. Streambed sediments collected from three surface sites analyzed for trace elements indicated that copper concentrations |
| Databáze: | OpenAIRE |
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