Zebra
Mussels Found in Nepco Lake, Wisconsin
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Inspect
your boat, trailer, and boating equipment and remove any visible plants and
animals. Dispose of them properly so they
do not get washed back into the lake.
Drain water from the motor, livewell, bilge, and transom wells while on shore and before leaving any water body. Spray your boat and boating equipment with high-pressure water or leave it in the sun to dry for 5 days before using it again
Dump unused bait in the trash. Never
release live bait into a water body, its ILLEGAL or
release aquatic animals from one water body into another. In
September, 2001, the state Legislature passed the Boat Launch Law, which makes
it illegal to launch watercraft if there may be aquatic plants or zebra mussels
attached.
Also, in that session, the Legislature passed a law that makes it illegal to
introduce invasive species to navigable waters. Invasive species, as currently
designated, are Eurasian water milfoil, curly-leaf pondweed and purple
loosestrife.
Fines under both laws are $200 for first-time violations, and second violations
may go from $700 to $2,000 and may include prison.
What other ways can you control Zebra Mussels?
Because the zebra mussel tolerates extreme crowding, it clogs intake pipes, filters, trash racks, and other components of ships, dams, pumping plants, and hydropower facilities that use freshwater and has become a serious problem. Chlorine injection effectively controls zebra mussels, but also produces toxic byproducts, some of which are carcinogenic. Furthermore, regulatory actions in the United States and Canada may reduce or eliminate chlorine for controlling zebra mussels. This Phase I project, combined with work supported by the U.S. Army Corps of Engineers, demonstrated the feasibility of using high-intensity pressure pulses from sparkers for the nontoxic, low-cost control of zebra mussels. Sparkers work by releasing stored electrical energy between two submersed electrodes, producing a high-intensity pressure pulse that can either clear away mature zebra mussels by interfering with feeding or inhibit young zebra mussels from attaching to surfaces. In the control concept investigated in this project, a sparker source is tethered near the entrance to a pipe that is to be kept free of, or cleared of, zebra mussels. A sparker was introduced in 1992 by another company, but has seen little use because of electrode maintenance issues, and cost, and because scientific data establishing its effectiveness were lacking. In this project, the feasibility of developing a new low-cost and low-maintenance sparker was investigated experimentally in laboratory tests. Also, field tests were conducted in which test samples were placed in water intake pipes during a zebra mussel growth season, and pressure pulses from the sparker were measured for correlation with zebra mussel response. These field tests were the first that combined zebra mussel response tests with measurements of sparker pulses at the locations of test samples.
Field tests conducted by Phoenix Science & Technology, Inc., at two sites on Lake Champlain, NY, showed that sparker pressure pulses generated near the exit of water intake pipes prevented growth of new zebra mussels for approximately 125 feet into the pipes. Also, the test results showed adult zebra mussels being cleared away for approximately 50 feet into the pipes. The pressure levels and corresponding acoustic spectra producing these effects on the zebra mussels also were measured. In addition, the propagation of the pressure pulse in the pipe showed effects associated with pipe cutoff frequencies and the fundamental frequencies of the sparker pulse. Laboratory tests showed that the sparker currently in use is inefficient. A new sparker design will have an efficiency of more than a factor of 10 higher than the current sparker. Also, new electrodes were tested, which have a lifetime that is four times longer than the electrodes in the current sparker. A new sparker system with high efficiency and new electrodes will operate for at least 1 year before needing electrode replacement instead of every 5 weeks, as in the current sparker. Based on this project, a sparker system for controlling zebra mussels is both technically and commercially feasible. A sparker can be developed during Phase II that effectively controls zebra mussels at a reduced cost compared to chlorine. This new prototype sparker will be used in field tests to continue to determine sparker operational requirements for the wide range of pipe diameters, pipe lengths, flow rates, and other parameters at zebra mussel problem sites. Commercial feasibility of sparker technology is supported by the environmental benefit of reducing the disinfection byproducts generated by chlorine systems currently in use. Sparker technology, in addition to use for controlling zebra mussels, has widespread commercial potential for many types of biofouling organisms. A successful program will result in a nontoxic, practical, low-cost sparker for controlling zebra mussels and for other antibiofouling applications. There are Many other methods of trying to control the Zebra Mussels, and I do not have access to all that data.
More of this article - Part 6 - Zebra Mussels Link - 1 2 3 4 5 6
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