Event Title

Nutrient Loads & Eutrophication in Pineview Reservoir

Location

Eccles Conference Center

Event Website

http://water.usu.edu/

Start Date

4-2-2009 9:55 AM

End Date

4-2-2009 10:00 AM

Description

The TMDL for Pineview Reservoir, Utah, identifies both nitrogen and phosphorus as limiting nutrients in primary production. Conditions during late summer lead to anaerobiosis in the hypolimnion of the reservoir. In order to better understand this phenomenon, stream samples were collected approximately twice-monthly and analyzed for nitrogen and phosphorus forms. Water column temperature, dissolved oxygen and light penetration were measured. Reservoir samples were collected and analyzed for nitrogen and phosphorus, algal taxa, pigments, and algal diversity via molecular methods. Surface water nutrient loads were lower than expected and water column chemistries were typical of oligotrophic systems throughout most of the spring and summer. Significant nutrient loads to the system are anticipated to be contributed by groundwater fluxes from reduced aquifers. An estimation of the possible sources of nutrient loads was made in an effort to better understand conditions leading to eutrophication and possible management techniques in Pineview Reservoir.

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Apr 2nd, 9:55 AM Apr 2nd, 10:00 AM

Nutrient Loads & Eutrophication in Pineview Reservoir

Eccles Conference Center

The TMDL for Pineview Reservoir, Utah, identifies both nitrogen and phosphorus as limiting nutrients in primary production. Conditions during late summer lead to anaerobiosis in the hypolimnion of the reservoir. In order to better understand this phenomenon, stream samples were collected approximately twice-monthly and analyzed for nitrogen and phosphorus forms. Water column temperature, dissolved oxygen and light penetration were measured. Reservoir samples were collected and analyzed for nitrogen and phosphorus, algal taxa, pigments, and algal diversity via molecular methods. Surface water nutrient loads were lower than expected and water column chemistries were typical of oligotrophic systems throughout most of the spring and summer. Significant nutrient loads to the system are anticipated to be contributed by groundwater fluxes from reduced aquifers. An estimation of the possible sources of nutrient loads was made in an effort to better understand conditions leading to eutrophication and possible management techniques in Pineview Reservoir.

https://digitalcommons.usu.edu/runoff/2009/AllPosters/14