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Case Study for Customer Location CA67:
Reservoir or Lake Use:
The lake is a recreational lake on a US Marine Corps Base. the
lake is 110 years old, and sits in the floodplain of the Santa
Margarita River, one of the last free flowing rivers in Southern
California. The lake is used for fishing and boating activities
(non contact).
System Overview and Reservoir:
Surface area is 125 acres; volume is 1,100 acre-feet; maximum
depth is 16 feet when full; average depth is 9 feet.
Reported Problem Before SolarBee Installation:
Initial objective was to increase dissolved oxygen (DO)
concentrations in the water column. Problems resulting from high
nutrient loadings included blue-green algae blooms and chronic
fish kills. Other issues included elevated coliform counts,
heavy metals, and turbidity.
SolarBee Installation:
Date: June 2003. Installed three SB10000F SolarBees on short
notice due to total disappearance of any measurable DO in the
lake. The machines are solar powered. Two intake hoses were set
at 10 feet deep, and the third was set at 7 ft. deep.
Results:
One week after installation the DO levels of the lake were at
saturation down to 10 feet. There was initially some strong
algal productivity, but not blue-green algae. During the
remainder of the 2003 summer there were no blue-green algae
blooms, no fish kills, nighttime DO levels were often near
saturation (10+ mg/L), water clarity improved, and there was a
significant reduction in coliform counts throughout the summer.
Results since 2003 have been similar, with good DO distribution
in the water column (documented by their data), no fish kills
and no sustained blue-green algae blooms. They have also
observed a dramatic increase in fish spawning, with many more
small fish than ever seen in the past. Water clarity also
continues to improve. At the boat dock they can see to the
bottom where previously they could not see even 1 foot. Even
with improved water clarity, several species of pondweed
(submerged macrophytes) have significantly reduced their
presence in the lake. Fishing remains excellent; the lake
appears very healthy with a vibrant and diverse fish population
throughout all four seasons.
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