Spatial Distribution of Pulsed Environmental Flows
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Transcript of Spatial Distribution of Pulsed Environmental Flows
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Spatial Distribution of Pulsed
Environmental FlowsGIS in Water Resources, 2011
Alison Wood
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Environmental Flow RegimeFlows to Keep Rivers Healthy
USGS Gage 08019500, Big Sandy Creek near Big SandySeason Subsistence Base Pulse Winter 20 cfs 73 cfs 1 per season
Trigger: 358 cfs Volume: 5,932 af Duration: 10 days
Spring 9 cfs 33 cfs 2 per season Trigger: 313 cfs Volume: 5,062 af Duration: 13 days
Summer 8 cfs 15 cfs 1 per season Trigger: 50 cfs Volume: 671 af Duration: 6 days
Fall 8 cfs 22 cfs 2 per season Trigger: 130 cfs Volume: 2,189 af Duration: 9 days
cfs = cubic feet per second , af = acre-feet
www.tceq.com
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TCEQ’s NeedWater Withdrawals Not Near Gages
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TCEQ Rights Points
USGS Gages
RAPID Model Output
Data Sources
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Bringing the Data Together
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RAPID Modelcreated by Cédric David
• Routing Application for Parallel computatIon of Discharge
• Input: surface and groundwater flows
• Output: flow and volume of water throughout river network
• Output in netCDF format
http://www.geo.utexas.edu/scientist/david/rapid.htm
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Mapping RAPID OutputCreate a Table from Data
http://www.geo.utexas.edu/scientist/david/files/RAPID_in_ArcGIS.pdf
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Mapping RAPID OutputChoose a Time-Step
http://www.geo.utexas.edu/scientist/david/files/RAPID_in_ArcGIS.pdf
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Mapping RAPID OutputJoin Table to Flowline Layer
http://www.geo.utexas.edu/scientist/david/files/RAPID_in_ArcGIS.pdf
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Mapping RAPID OutputResult: Map with Flow Values
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Mapping RAPID OutputAttribute: Qout = Flow
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RAPID Output – HydrographModel Flow Over Time
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USGS Gage Flow– HydrographMeasured Flow Over Time
1/1/2004 5/3/2004 9/3/2004 1/4/2005 5/7/2005 9/7/2005 1/8/2006 5/11/20069/11/20061/12/20075/15/20079/15/20070
10000
20000
30000
40000
50000
60000
70000
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USGS Gage Discharge, Site NWISDV:08173900
HydroExcel: http://his.cuahsi.org/hydroexcel.html
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Locations of Hydrographs: Gage 08173900 and Reach 1622713
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TCEQ’s NeedWater Withdrawals Not Near Gages
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Next Steps:Collect Data, Compare, Correlate
• RAPID hydrographs for all chosen reaches
• USGS hydrographs for all chosen gages
• Compare model output with observed data
• Correlate reaches with gages that reflect flows
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Until Real-Time Flow Maps(Example with Historical Data)
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Questions?