TY - GEN
T1 - Dissolved oxygen modeling of Lake Ogallala
T2 - World Environmental and Water Resources Congress 2006: Examining the Confluence of Environmental and Water Concerns
AU - Kozimor, L.
AU - Stansbury, J.
AU - Dove, E.
AU - Admiraal, D.
PY - 2007
Y1 - 2007
N2 - The Lake Ogallala hydropower tailwater reservoir is subjected to wide fluctuations of the inflow water quality and quantity. These alterations impact lake temperatures, water stage, dissolved oxygen (DO) and nutrients. A two dimensional continuous simulation, hydrodynamic and water quality model, CE-QUAL-W2, was used to simulate the lake's dissolved oxygen. The elements modeled include surges of low DO and temperatures; high chemical oxygen demands and dissolved nutrients; in-lake algae, macrophytes, and epiphytes response; temperature and bathymetric induced circulation patterns; and weather impacts. The epiphyte routine was used to simulate macrophytes, and the model was able to emulate the diurnal DO and temperature fluctuations which ranged from 2 to 12 mg/L and 19.5 to 23 degrees C, respectively. The study found that the chemical demand resulted in an approximately 1.5 mg/L drop in DO across the lake but also found that macrophyte respiration causes approximately a 2 mg/L reduction in DO during dark respiration. Management alternatives were modeled based on controlling the inflow of DO and macrophyte harvesting.
AB - The Lake Ogallala hydropower tailwater reservoir is subjected to wide fluctuations of the inflow water quality and quantity. These alterations impact lake temperatures, water stage, dissolved oxygen (DO) and nutrients. A two dimensional continuous simulation, hydrodynamic and water quality model, CE-QUAL-W2, was used to simulate the lake's dissolved oxygen. The elements modeled include surges of low DO and temperatures; high chemical oxygen demands and dissolved nutrients; in-lake algae, macrophytes, and epiphytes response; temperature and bathymetric induced circulation patterns; and weather impacts. The epiphyte routine was used to simulate macrophytes, and the model was able to emulate the diurnal DO and temperature fluctuations which ranged from 2 to 12 mg/L and 19.5 to 23 degrees C, respectively. The study found that the chemical demand resulted in an approximately 1.5 mg/L drop in DO across the lake but also found that macrophyte respiration causes approximately a 2 mg/L reduction in DO during dark respiration. Management alternatives were modeled based on controlling the inflow of DO and macrophyte harvesting.
KW - Dissolved oxygen
KW - Hydroelectric powerplants
KW - Lakes
KW - Reservoirs
UR - http://www.scopus.com/inward/record.url?scp=84855184797&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84855184797&partnerID=8YFLogxK
U2 - 10.1061/40856(200)106
DO - 10.1061/40856(200)106
M3 - Conference contribution
AN - SCOPUS:84855184797
SN - 0784408564
SN - 9780784408568
T3 - Examining the Confluence of Environmental and Water Concerns - Proceedings of the World Environmental and Water Resources Congress 2006
BT - Examining the Confluence of Environmental and Water Concerns - Proceedings of the World Environmental and Water Resources Congress 2006
Y2 - 21 May 2006 through 25 May 2006
ER -