Aquatic Engineering Solutions

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• Aquatic Engineering Solutions
• Chris Cutler, Katie DeChristopher,
• Shaun Smith, Joe Testa
• Sponsored by Dr. Lee Kump
• Geoscience Department
• April 21, 2005

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Project Background

• Background
• Green Lake is a meromictic lake probably formed
  by glacial waterfalls during
• deglaciation 1
• Problem
• Vertical profiling data has never been collected
  during the winter months (Jan. Mar.) in Green
  Lake due to park restrictions

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Previous/Current Work

• Current Data Collection Methods
• Diving
• Lowering SONDE and other
• sampling packages from a boat

• Problems with These Methods
• Violates Park Restrictions during winter
  months
• Not able to gather repeatable data over an
  extended period of time

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Project Description

• Goal
• Design and manufacture a hoist system that will
  lift a SONDE vertically through a 52m deep lake
  once per day during the months of January through
  March while collecting data at specified depths
• Challenges
• High Hydrogen Sulfide Content
• Effects of Temp. on Battery Life
• Waterproofing Design
• Balancing Design
• Stopping at 20 Specified Depths
• Where to Test Final Product

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General Design
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Construction Progress

• To Do
• Assemble CO2 System
• Waterproof Box
• Place Stops on Rope
• Complete Frame

• Completed
• Most of Frame
• Buoyancy Tanks
• CO2 System Layout
• Some of Gripper Machining and Assembly
• Code Development
• Electronics Set-Up

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Tests/Check Steps

• Experiments To Be Conducted
• Watertight Box Check
• Balanced Design
• Pool Test for overall functionality
• Obtain final weight and determine operating
  parameters

• Completed Experiments
• Buoyancy of LDPE balls, CO2 Tank, watertight box
• Battery Life of a 6V 12.5 Amp Hour battery
  connected to a Stamp, running a copy of our
  program
• Zip Tie strength and fixity
• Valve Operation
• Code Functionality

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References

• 1 Brunskill and Ludlam, Limnology and
  Oceanography,
  Volume XIV, Number 6, Nov. 1969

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• Questions?