water quality in the san marcos basin
DESCRIPTION
Water Quality in the San Marcos Basin. GIS in Water Resources Aurore Mercelat. Agenda. Objectives and location Problematic Groundwater quality Surface water quality Conclusions Future work. Objectives. Compare water quality : Groundwater vs Surface water - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Water Quality in the San Marcos Basin](https://reader036.vdocuments.us/reader036/viewer/2022062310/56815f18550346895dcde456/html5/thumbnails/1.jpg)
WATER QUALITY IN THE SAN MARCOS
BASIN
GIS in Water ResourcesAurore Mercelat
![Page 2: Water Quality in the San Marcos Basin](https://reader036.vdocuments.us/reader036/viewer/2022062310/56815f18550346895dcde456/html5/thumbnails/2.jpg)
2
Final Project Presentation
AGENDA
Objectives and location Problematic Groundwater quality Surface water quality Conclusions Future work
11/23/10
![Page 3: Water Quality in the San Marcos Basin](https://reader036.vdocuments.us/reader036/viewer/2022062310/56815f18550346895dcde456/html5/thumbnails/3.jpg)
3
Final Project Presentation
OBJECTIVESCompare water quality:
• Groundwater vs Surface water • Drinking water vs recreational water
Source: http://blog.texasrvtravel.com/https://www.acsmeetings.org/
11/23/10
![Page 4: Water Quality in the San Marcos Basin](https://reader036.vdocuments.us/reader036/viewer/2022062310/56815f18550346895dcde456/html5/thumbnails/4.jpg)
4
Final Project PresentationWHERE DOES OUR STUDY TAKE PLACE?
Why?
Edwards aquifer: groundwater
Rivers: surface water
San Marcos city: on the aquifer and near several rivers
11/23/10
![Page 5: Water Quality in the San Marcos Basin](https://reader036.vdocuments.us/reader036/viewer/2022062310/56815f18550346895dcde456/html5/thumbnails/5.jpg)
5
Final Project Presentation
PROBLEMATICS
Source: City Of San Marcos Water Supply Master Plan, December 2004
11/23/10
![Page 6: Water Quality in the San Marcos Basin](https://reader036.vdocuments.us/reader036/viewer/2022062310/56815f18550346895dcde456/html5/thumbnails/6.jpg)
6
Final Project Presentation
WATER SUPPLIES OF SAN MARCOS
Current water supplies: Mainly Edwards aquifer:
BUT, new regulations to protect the aquifer
Potentiel water supplies: Reclaimed water (wastewater reuse) Surface water
Canyon Lake: costs leasing and carrying the water (≈ 30 km) San Marcos river (rights already owned) (some km)
Other groundwater resources
What would be the difference of quality between groundwater and surface water?
11/23/10
![Page 7: Water Quality in the San Marcos Basin](https://reader036.vdocuments.us/reader036/viewer/2022062310/56815f18550346895dcde456/html5/thumbnails/7.jpg)
7
Final Project Presentation
GROUNDWATER RESOURCE: THE EDWARDS
AQUIFER "Water quality in the Edwards is exceptionally good"
(http://www.edwardsaquifer.net/) Metals: usually below drinking water standards Ions: healthy mix
Fecal coliform bacteria: indicators of harmful bacteria presence
11/23/10
Source: http://www.ars.usda.gov
![Page 8: Water Quality in the San Marcos Basin](https://reader036.vdocuments.us/reader036/viewer/2022062310/56815f18550346895dcde456/html5/thumbnails/8.jpg)
8
Final Project PresentationSURFACE WATER AROUND SAN MARCOS
11/23/10
![Page 9: Water Quality in the San Marcos Basin](https://reader036.vdocuments.us/reader036/viewer/2022062310/56815f18550346895dcde456/html5/thumbnails/9.jpg)
9
Final Project PresentationBACTERIOLOGICAL QUALITY
11/23/10
EPA measurements TCEQ measurements NWIS measurements
2000
126
2000
1262000
![Page 10: Water Quality in the San Marcos Basin](https://reader036.vdocuments.us/reader036/viewer/2022062310/56815f18550346895dcde456/html5/thumbnails/10.jpg)
10
Final Project Presentation
CONCLUSIONS Surface water is prone to variations
can exceed drinking water requirements can exceed recreational water requirements
Generally, less clean than Edwards' water
Why is it so? What are the potential sources of pollution?
11/23/10
![Page 11: Water Quality in the San Marcos Basin](https://reader036.vdocuments.us/reader036/viewer/2022062310/56815f18550346895dcde456/html5/thumbnails/11.jpg)
11
Final Project PresentationEDWARDS ' WATER, NATURALLY HEALTHY?
Natural treatments:
Dilution
Settling
Biological activity: neutralize organic material
Natural Degradation
11/23/10
![Page 12: Water Quality in the San Marcos Basin](https://reader036.vdocuments.us/reader036/viewer/2022062310/56815f18550346895dcde456/html5/thumbnails/12.jpg)
12
Final Project Presentation
FUTURE WORK Identify the potential sources of pollution 11/23/10
![Page 13: Water Quality in the San Marcos Basin](https://reader036.vdocuments.us/reader036/viewer/2022062310/56815f18550346895dcde456/html5/thumbnails/13.jpg)
13
Final Project Presentation
THANK YOU FOR LISTENING...
11/23/10