Skip to main content

Linking Nutrient Sources to Extreme Dissolved Oxygen, Ammonia Toxicity, Algae and Ph Impairments for an Impounded Reach Using A Hydro-dynamic Water Quality Model

Buy Article:

$9.50 plus tax (Refund Policy)

Or sign up for a free trial

Severe and persistent anoxia, ammonia toxicity, excess algae and elevated pH of an impounded reach of the upper Klamath River, Oregon are linked to pollutant sources using the water quality model CE-QUAL-W2. Typically, dissolved oxygen (DO) concentrations in the Keno Reservoir are less than 1.0 mg/L for a period of time between June and September which is less than Oregon's minimum DO criteria of 4.0 mg/L. Concurrent with the low DO period are elevated ammonia concentrations which cause violations of Oregon's acute and chronic toxic criteria and pH values greater than 9.0. Chlorophyll a concentrations also exceed the 0.015 mg/L criteria. The above water quality impairments are included on Oregon's 2004 / 2006 303(d) list. The water quality model CE-QUAL-W2 was used to quantitatively link the pollutant sources and the water quality response. Organic matter loading is dominated by the nonpoint source load from Upper Klamath Lake and leads to the DO and ammonia toxicity impairments. However, at times, the irrigation project (Klamath Project) can also contribute to severe water quality impairment. Currently, there is no measurable impact on DO concentration from loading by the point sources. The 2002 Upper Klamath Lake TMDL predicts restoration will shift the lake from a hyper-eutrophic to eutrophic state. Even under restored conditions, Upper Klamath Lake is predicted to deliver large nutrient loading to Klamath River in one out of every four years due to periodic naturally occurring algae blooms.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
No Metrics


Document Type: Research Article

Publication date: 2007-10-01

More about this publication?
  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

    A subscription to the Proceedings of the Water Environment Federation includes access to most papers presented at the annual WEF Technical Exhibition and Conference (WEFTEC) and other conferences held since 2000. Subscription access begins 12 months after the event and is valid for 12 months from month of purchase. A subscription to the Proceedings of the Water Environment Federation is included in Water Environment Federation (WEF) membership.

    WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access. Access begins 12 months after the conference or event
  • Subscribe to this Title
  • Membership Information
  • About WEF Proceedings
  • WEFTEC Conference Information
  • Learn about the many other WEF member benefits and join today
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more