Modeling bacteria flow from wildlife in the Leon River Basin, TX Sonny Kwon.
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Transcript of Modeling bacteria flow from wildlife in the Leon River Basin, TX Sonny Kwon.
![Page 1: Modeling bacteria flow from wildlife in the Leon River Basin, TX Sonny Kwon.](https://reader036.fdocument.pub/reader036/viewer/2022062517/56649ec95503460f94bd67bb/html5/thumbnails/1.jpg)
Modeling bacteria flow from wildlife in the Leon River Basin,
TX
Sonny Kwon
![Page 2: Modeling bacteria flow from wildlife in the Leon River Basin, TX Sonny Kwon.](https://reader036.fdocument.pub/reader036/viewer/2022062517/56649ec95503460f94bd67bb/html5/thumbnails/2.jpg)
Background / problem
• Section 303(d) of the 1972 Federal Clean Water Act (CWA) requires that each State identify water bodies that do not meet the State’s water quality standards and create a prior-ity ranking of the impaired waters based on the severity of pollution and the water body’s intended use.
• The Leon River basin was Initially placed on the list of im-paired waters in 1996 due to bacteria levels.
• It was analyzed that between 41 and 55% of all bacteria in the Leon originated from wildlife.
![Page 3: Modeling bacteria flow from wildlife in the Leon River Basin, TX Sonny Kwon.](https://reader036.fdocument.pub/reader036/viewer/2022062517/56649ec95503460f94bd67bb/html5/thumbnails/3.jpg)
Study area / objective
![Page 4: Modeling bacteria flow from wildlife in the Leon River Basin, TX Sonny Kwon.](https://reader036.fdocument.pub/reader036/viewer/2022062517/56649ec95503460f94bd67bb/html5/thumbnails/4.jpg)
Methods (1/5)
• First attempt: land cover (forest + rangeland) adjacency to water body wildlife density known!
• Problem: forest + rangeland = 98% of basin
![Page 5: Modeling bacteria flow from wildlife in the Leon River Basin, TX Sonny Kwon.](https://reader036.fdocument.pub/reader036/viewer/2022062517/56649ec95503460f94bd67bb/html5/thumbnails/5.jpg)
Methods (2/5)
• Second attempt: Leon TMDL final modeling report (2006) Texas Parks and Wildlife Dep’t data (2004) EPA Fecal Tool (2000)
![Page 6: Modeling bacteria flow from wildlife in the Leon River Basin, TX Sonny Kwon.](https://reader036.fdocument.pub/reader036/viewer/2022062517/56649ec95503460f94bd67bb/html5/thumbnails/6.jpg)
Methods (3/5)• Watershed delineation (NED 30m), Counties, HUC12
o Fill sinks, flow direction, flow accumulation, drainage basin, polygon conversion with HUC12’s, raster calculator
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Methods (4/5)
![Page 8: Modeling bacteria flow from wildlife in the Leon River Basin, TX Sonny Kwon.](https://reader036.fdocument.pub/reader036/viewer/2022062517/56649ec95503460f94bd67bb/html5/thumbnails/8.jpg)
Methods (4/5)
![Page 9: Modeling bacteria flow from wildlife in the Leon River Basin, TX Sonny Kwon.](https://reader036.fdocument.pub/reader036/viewer/2022062517/56649ec95503460f94bd67bb/html5/thumbnails/9.jpg)
Methods (5/5)
• Schematic Processor• Arc Hydro Tool for Schematic Networks
![Page 10: Modeling bacteria flow from wildlife in the Leon River Basin, TX Sonny Kwon.](https://reader036.fdocument.pub/reader036/viewer/2022062517/56649ec95503460f94bd67bb/html5/thumbnails/10.jpg)
Work left:• Assign nodes and links• Edit python op• Run model!
![Page 11: Modeling bacteria flow from wildlife in the Leon River Basin, TX Sonny Kwon.](https://reader036.fdocument.pub/reader036/viewer/2022062517/56649ec95503460f94bd67bb/html5/thumbnails/11.jpg)
Acknowledgements
I would like to thank Parsons Inc. for providing the data, and Dr. Maidment for developing the tool.