1. Water Quality/BASINS Mid-Project Update
Tony Vessa
Nov. 19, 2002

2. Project Goals Better understand GIS tools in water quality assessment
Understand City of Austin’s impact on water quality on the Lower Colorado River
Full utilization of the EPA BASINS 3.0 software

4. BASINS Objectives
To facilitate examination of environmental information
To support analysis of environmental systems
To provide a framework for examining management alternatives

5. BASINS Benefits specific to GIS
Data subdivided into familiar HUCs
Data completely compatible with ArcGIS
Provides shapefiles for basemaps projected in NAD1927
Provides various downloadable data for environmental analysis

6. Hydrologic Unit Code

7. Austin, TX Hydrologic Unit^ _
HUC
Austin
Austin, TX Hydrologic Unit

8. Data Available HUC/State/EPA/ County Boundaries Urban Boundaries
Drinking Water Supplies
Weather Stations Data
TRI Data
CERCLIS(Superfund)
River Reach Files
Major Roads
Ecoregions (level III)
NAWQA Study Units
Mineral Data
Water Quality Observation Stations
digital elevation maps
RCRIS Sites

9. Area Designations

10. City Attributes

11. Point Stations

12. Water Quality Data Temp Spec Conductance DO, BOD Alkalinity, Hardness
Nutrients (Nit, Pho)
Hardness
Chloride
Metals (Cr, Cu, Pb, Ca, Fe, Ni, Ag, Zn, Al)
Chlordane
Chlorophyll
DDE, DDT
Eldrin/Dieldrin
Heptachlor
Pcbs
Mercury
Sulfate

13. Water Quality Statistics
4 Year Increments
Station ID
Agency ID
Number of Observations
Mean
15th, 25th, 50th, 75th, 85th Percentiles
Standard Deviation

14. Water Quality Criteria
Parameter Name
CAS Number
Fresh Acute/Chronic
Marine Acute/Chronic
Drinking Water
Human Health
Reference Level Source

15. Wrap Up
BASINS -one stop shopping
Project Direction
Questions????