Hill Country Alliance

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• Interactive GIS emphasizing hydrologic data in
  the
• Texas Hill Country
• for the
• Hill Country Alliance

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Purpose

• Two discrete components
• Developed an interactive mapping server
  (interactive GIS) depicting hydrologic and
  environmental data for the public
• Provided data in a uniform format for the purpose
  of creating a groundwater vulnerability model

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What is an interactive GIS?

• Internet mapping service (IMS)
• A website that allows a user to view dynamic
  maps, spatial content and spatial analysis via
  the Internet
• Geared towards use by the general public

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Texas Hill Country

• The Texas Hill Country has seen a population
  explosion in the last few years.

County 2000 Population 2006 Estimated Population Change
Bexar (San Antonio) 1,392,931 1,555,592 11.7
Comal (New Braunfels) 78,021 101,181 29.7
Hays (San Marcos) 31.1
Gillespie (Fredericksberg) 20,814 23,527 13
Kendall (Boerne) 23,743 30,213 27.3
Travis (Austin) 812,280 921,006 13.4
Data from the US Census Bureau
Percent change from April 1, 2000 to July 1, 2006
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Hill Country Features

• Comal Springs, San Marcos Springs, Barton Springs

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Aquatic Species

• Fountain darter, Comal Springs riffle beetle,
• San Marcos salamander

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Birds

• Golden-cheeked warbler
• Black-capped vireo

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Hill Country Alliance

• The Hill Country Alliance (HCA) is a non-profit
  organization whose purpose is to raise public
  awareness and build community support around the
  need to preserve the natural resources and
  heritage of the Central Texas Hill Country.
• Formed in September of 2004 to begin educating
  the public about regional planning, conservation
  development, and a more responsible approach
  growth in the hill country.

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Scope

• HCA is composed of 17 counties - Bandera, Bexar,
  Blanco, Burnet, Comal, Edwards, Gillespie, Hays,
  Kendall, Kerr, Kimble, Llano, Mason, Medina,
  Real, Travis, Uvalde
• Specifically defined and prioritized data layers
• Website capable of use by the general public

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Data

• A. Core/Critical Data
• Digital Elevation Models, contours, county
  shapefiles, transportation, soil data, major and
  minor aquifers, recharge zone, caves and
  sinkholes, vegetation extent and type, surface
  geology, faults and lineaments, streams, springs
  and dams
• B. Value-Add Data
• Critical habitat/endangered species, dye tracer
  studies, location of USGS data collection sites,
  streamflow gain/loss data
• C. Nice-to-Have Data
• Wastewater disposal areas, large groundwater
  withdrawals, aquifer hydraulic characteristics,
  aerial orthophotos

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Data Sources

• TNRIS Texas Natural Resource Information System
• TPWD Texas Parks Wildlife Department
• USGS United States Geologic Survey
• EAA Edwards Aquifer Authority
• TSS Texas Speleological Survey
• NRCS Natural Resource Conservation Service
• BEG Bureau of Economic Geology

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Unique Features of Manifold IMS

• Dynamic updates
• Cost-effective
• Accepts over 80 data formats
• Hyperlinked information

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Challenges

• Integration with TerraCorps urban landuse
  dataset
• Large coverage area
• (17 counties, 17,763 square miles)
• Multiple datums, data formats

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Hill Country Alliance Interactive Website
link
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Groundwater Vulnerability
Insert text here ?
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Groundwater Vulnerability
Slope in percent (raw)
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Groundwater Vulnerability
Soil Component, Ksat Attribute (raw)
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Groundwater Vulnerability
Soil Component, Ksat Attribute (indexed)
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Groundwater Vulnerability
Soil Component, Total Composite
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Final Deliverables
Interactive Web Viewer

• Final Report 2 copies
• Poster for display in Geography Department
• DVDs (2) for the IMS containing
• All data
• Metadata
• Final Report
• Poster
• PowerPoint Presentation
• Instructions on how to use the DVD
• DVDs (2) for the groundwater vulnerability
  model containing
• Model data in raster form
• Metadata

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Conclusion

• The end results of this project will be tools
  that help to divert the inevitable growth of the
  region towards less vulnerable parts of the Hill
  Country, thereby maintaining the environmental
  degradation at a more manageable level and
  extending the lifespan of this uniquely beautiful
  and fragile piece of the world.

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