improved watershed assessment: new tools in google earth · improved watershed assessment: new...
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![Page 1: Improved Watershed Assessment: New Tools in Google Earth · Improved Watershed Assessment: New Tools in Google Earth Rebecca Phillips, Ofer Beeri, and Moffatt Ngugi, USDA-Agricultural](https://reader033.vdocuments.site/reader033/viewer/2022053013/5f10159c7e708231d4475e7b/html5/thumbnails/1.jpg)
Improved Watershed Assessment: New Tools in
Google Earth
Rebecca Phillips, Ofer Beeri, and Moffatt Ngugi,
USDA-Agricultural Research Service Wetland Condition Assessment Workshop
March 17 2010
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Outline
Introduction – purpose of the work
Approach used
Results
Interpretation – specific potential applications
Demonstration – Accessing results in Google Earth
Conclusions/recommendations/suggestions
Outline
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Introduction
Regional Wetland Monitoring and Assessment Work Group (Apr 26 2008)
Stated Goal:
Demonstrate how project results can be reported to the public and restoration practitioners to
inform management decisions
The federal mitigation rule demands a “Watershed Approach”
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Problem Statement
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Souris
river
Missouri
river
Sh
eri
dan
Co
un
ty
Mc
He
nry
Co
un
ty
McL
ean
Co
un
ty
Wa
rdC
ou
nty
Sheyenn
e river
basin
North Dakota
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100°0'0"W101°0'0"W
101°0'0"W
48
°0'0
"N
48
°0'0
"N
47
°30
'0"N
47
°30
'0"N
0 10 205 Miles
¯Some Watersheds in Central North Dakota
Legend
Souris
Sheyenne
Missouri
Large Rivers
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Delineation of watersheds: Approach
• A quantitative characterization
• Primary data source
– DEM ~ topographic/elevation data
• GIS – Processing software ArcGIS (ESRI)
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100°0'0"W101°0'0"W
101°0'0"W
48
°0'0
"N
48
°0'0
"N
47
°30
'0"N
47
°30
'0"N
0 10 205 Miles
¯Some Watersheds in Central North Dakota
Legend
Souris
Sheyenne
Missouri
Large Rivers
Digital Elevation
Model (DEM)
Flow Direction
Watersheds
Pour Points
Drainage Lines
Basins
Flow Accumulation
Approach used: Delineation of watersheds
![Page 9: Improved Watershed Assessment: New Tools in Google Earth · Improved Watershed Assessment: New Tools in Google Earth Rebecca Phillips, Ofer Beeri, and Moffatt Ngugi, USDA-Agricultural](https://reader033.vdocuments.site/reader033/viewer/2022053013/5f10159c7e708231d4475e7b/html5/thumbnails/9.jpg)
Approach used: Delineation of watersheds
![Page 10: Improved Watershed Assessment: New Tools in Google Earth · Improved Watershed Assessment: New Tools in Google Earth Rebecca Phillips, Ofer Beeri, and Moffatt Ngugi, USDA-Agricultural](https://reader033.vdocuments.site/reader033/viewer/2022053013/5f10159c7e708231d4475e7b/html5/thumbnails/10.jpg)
Results
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Interpretation: specific potential applications
![Page 12: Improved Watershed Assessment: New Tools in Google Earth · Improved Watershed Assessment: New Tools in Google Earth Rebecca Phillips, Ofer Beeri, and Moffatt Ngugi, USDA-Agricultural](https://reader033.vdocuments.site/reader033/viewer/2022053013/5f10159c7e708231d4475e7b/html5/thumbnails/12.jpg)
Interpretation: specific potential applications
Water shed total area: 3800 acres
Sum of catchment surface area: 370 acres
Sum of catchment potential volume: 1,432,859
Water shed total area: 3370 acres
Sum of catchment surface area: 314 acres
Sum of catchment potential volume: 1,495,325
~641 acres
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Interpretation: specific potential applications
Contributing area
= 2379 acres
Contributing
area = 2.1 acres
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Demonstration: Accessing the results in Google Earth
• USDA-ARS Mandan website
• http://www.ars.usda.gov/Research/docs.htm?docid=19461
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Conclusions/recommendations/ suggestions
• Website : http://www.ars.usda.gov/Research/docs.htm?docid=19461
• Potential applications: – Mitigation design and planning,
– restoration,
– flood control,
– habitat assessment,
– evaluating populations of wetlands,
– agricultural drainage, grazing allotment planning
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NWI data/USGS