TheEffectofUrbanizationinthesurfacewaterrunoff：城市化对地表径流的影响课件

1、The Effect of Urbanization to the surface-water runoffThe comparison between the urbanized and undeveloped zones第1页，共16页。Outline Objective/Study area Data Sources Backgrounds Map Creation Analysis Question第2页，共16页。 Build a Basemap of the City of Austin Apply the precipitation data (time-series) on t

2、he study areas Compare the flow pattern in regards to the land coverObjective第3页，共16页。Study AreasThe Shoal CreekThe Barton Creek第4页，共16页。1. Aerial Photo: Texas Natural Resources Information tnris.state.tx.us/update3.cfm?Tx_County_Name=Travis 2. Land Cover: National Land Cover Institute 3. Digital El

3、evation Model: USGS Dataset 4. Gage station data: USGS Dataset /GIS/metadata/usgswrd/XML/streamgages.xml 5. Stream Network data: City of Austin GIS Data Sets ftp:/coageoid01.ci.austin.tx.us/GIS-Data/Regional/coa_gis.html 6. Precipitation Data: Hourly/Daily Rain Data from NOAAs Forecast Systems /hour

4、ly_precip.html Data Sources第5页，共16页。BackgroundThe sources of flooding in Austin areaUnique geographic and atmospheric conditionCreeksUrban floodingHurricane and tropical storms第6页，共16页。The Land Cover of Austin, Texas第7页，共16页。Building a BasemapWatershed of both creeks第8页，共16页。The completed Basemap第9页

5、，共16页。Gathering discharge and precipitation dataUSGS Streamgage dataPrecipitation data第10页，共16页。AnalysisSep. 7, 2019Sep. 2019Loop 360SH71Barton SpringBarton LostShoalDayDischarge (cfs)60.00 5.40 2.44 5.60 0.00 70.01 6.70 2.49 7.60 81.00 第11页，共16页。AnalysisSep. 2019Loop 360SH71Barton SpringBarton Lost

6、ShoalDayDischarge (cfs)70.01 6.70 2.49 7.60 81.00 80.00 20.00 2.52 14.00 212.00 Sep. 8, 2019第12页，共16页。AnalysisSep. 2019Loop 360SH71Barton SpringBarton LostShoalDayDischarge (cfs)80.00 20.00 2.52 14.00 212.00 90.00 32.00 2.53 33.00 9.10 Sep. 9, 2019第13页，共16页。Analysis第14页，共16页。ConclusionThe land cover largely influences the discharge rate and