Lake Travis Levels at Volente Beach

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Lake Travis Levels at Volente Beach

• Elizabeth Reining
• Fall Term Project
• GISWR 2002

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Objective

• Realize loss of property at different lake levels
  over the past six months with taken GPS
  measurements.

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Government Takings Cases

• LCRA controls land under surface of Lake Travis
• Several court cases against government intrusion
• Nolan
• Dollan
• Lucas

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Volente Beach
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Why Volente

• Highland Lakes Marina
• Sandy beach
• Low incline
• No cliffs
• Easy access

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Data Collection

• Used a GPS unit to measure the historic and
  current lake line for the past six months.

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Problems

• Weather several weekends in a row, heavy cloud
  cover

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Problems

• Magellen 310 only reads to the second

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Solution

• Used Leica GS50
• Tracks to the centimeter
• Gives accuracy of measurement
• Measure length and area

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Leica GS 50

• Only available for two weekends
• Went to historical data of flood of July, 2002
• Used photographs taken at the time of the flood
• Marked the points on site
• Took measurements from the markers

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Lab

• Put the location data into dbf format to view in
  ArcGIS

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Lab

• There formed polygons into a new shapefile

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Lab

• Figured area of each polygon with XTools
• Compared derived area from area given by Leica
  GS50
• Multiplied area by tax rate for square foot from
  information from Travis County Appraisal District

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Future

• Next would like to find real estate value of the
  property because at times private property owners
  get value as determined by the market and not the
  tax appraisal district.

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Acknowledgments

• Thanks to Matthew Horstman for his photographs
  and help with data collection
• Thanks to Dr. Maidment for his help when my
  original idea would not work.