the effect of urbanization to the surface-water runoff the comparison between the urbanized and...
DESCRIPTION
1. Build a Basemap of the City of Austin 2. Apply the precipitation data (time- series) on the study areas 3. Compare the flow pattern in regards to the land cover ObjectiveTRANSCRIPT
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The Effect of The Effect of Urbanization Urbanization toto the the surface-water runoffsurface-water runoff
The comparison between the urbanized and undeveloped zones
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OutlineOutline
Objective/Study area Data Sources Backgrounds Map Creation Analysis Question
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1. Build a Basemap of the City of Austin
2. Apply the precipitation data (time-series) on the study areas
3. Compare the flow pattern in regards to the land cover
ObjectiveObjective
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Study AreasStudy Areas
The Shoal Creek The Barton
Creek
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1.1. Aerial Photo: Texas Natural Resources Information http://www.tnris.state.tx.us/update3.cfm?Tx_County_Name=Travis
2. 2. Land Cover: National Land Cover Institute http://landcover.usgs.gov
3.3. Digital Elevation Model: USGS Dataset
http://seamless.usgs.gov
4.4. Gage station data: USGS Dataset http://water.usgs.gov/GIS/metadata/usgswrd/XML/streamgages.xml
5.5. Stream Network data: City of Austin GIS Data Sets ftp://coageoid01.ci.austin.tx.us/GIS-Data/Regional/coa_gis.html
6.6. Precipitation Data: Hourly/Daily Rain Data from NOAA’s Forecast Systems
http://precip.fsl.noaa.gov/hourly_precip.html
Data SourcesData Sources
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BackgroundBackgroundThe sources of flooding in Austin area1. Unique geographic and atmospheric condition2. Creeks3. Urban flooding4. Hurricane and tropical storms
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The Land Cover of Austin, TexasThe Land Cover of Austin, Texas
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Building a BasemapBuilding a Basemap
Watershed of both creeks
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The completed BasemapThe completed Basemap
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Gathering discharge and precipitation dataGathering discharge and precipitation dataUSGS Streamgage data Precipitation
data
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AnalysisAnalysisSep. 7, 2002
Sep. 2002 Loop 360 SH71 Barton Spring Barton Lost Shoal
Day Discharge (cfs)
6 0.00 5.40 2.44 5.60 0.00 7 0.01 6.70 2.49 7.60 81.00
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AnalysisAnalysis
Sep. 2002 Loop 360 SH71 Barton Spring Barton Lost Shoal
Day Discharge (cfs)
7 0.01 6.70 2.49 7.60 81.00 8 0.00 20.00 2.52 14.00 212.00
Sep. 8, 2002
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AnalysisAnalysis
Sep. 2002 Loop 360 SH71 Barton Spring Barton Lost Shoal
Day Discharge (cfs)
8 0.00 20.00 2.52 14.00 212.00 9 0.00 32.00 2.53 33.00 9.10
Sep. 9, 2002
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AnalysisAnalysis
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ConclusionConclusion
The land cover largely influences the discharge rate and time to reach the peak point.
Soil layer
runoffrunoff
impermeable layer
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QuestionQuestion
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