Georeferencing Water Quality Information to the NHD Kimberly Sparks Anne Marie Miller
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Transcript of Georeferencing Water Quality Information to the NHD Kimberly Sparks Anne Marie Miller
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Georeferencing Water Quality Information to the NHD
Kimberly SparksAnne Marie Miller
Research Triangle InstituteRTP, NC
NHD Applications SymposiumAustin , TX
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WQSDatabase
STORET
Inte
rnet
TMDLEvents
305(b)Events
NationalAssessmentDatabase
Reach Address Database
WQSEvents
NHD
TMDLTrackingSystem
GRTS(P2000)
303(d)Events
STORETEvents
GRTSEvents
WATERS(Watershed Assessment Tracking Environmental Results System)
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What is the NHD-RIT?• ArcView 3.x extension
• Used to index 303(d) waters, 305(b) waters, Water Quality Standards, Fish Consumption Advisories, and Beaches
– georeferencing point entities to a point along a linear route reach in NHD
– georeferencing waterbody entities to waterbody reaches in NHD
• Tool for …
– georeferencing linear entities to linear route reaches in NHD
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National Hydrography Dataset (NHD)
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Storing Locational Information
Reach Code Entity ID150400010000001 WB-A150400010000002 WB-A150400010000003 WB-A150400010000004 WB-A150400010000005 WB-A150400010000006 WB-B150400010000007 WB-B150400010000008 WB-B150400010000009 WB-B150400010000010 WB-C150400010000011 WB-C150400010000012 WB-C
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Water Quality Database Link to GIS Database
Event Table Indexed to NHD
NHD Coverage
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Rch_code T_meas F_meas Entity_ID10190006000012 0.00 100.00 WB-A10190006000013 0.00 100.00 WB-A10190006000014 0.00 100.00 WB-A
Rch_code T_meas F_meas Entity_ID10190006000012 0.00 100.00 WB-A10190006000013 0.00 100.00 WB-A10190006000014 0.00 50.00 WB-A
Linear Event ThemesReferences to Geographic Information allow event tables to be displayed as themes in ArcView.
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Point Events
Rch_code P_meas Entity_ID10180005000135 89.40 DWS-1
Can be used to display drinking water intakes, point source discharges,or as a place holder for small streams that are not in the 1:100K linework.
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Waterbody Features
Stored as shapefiles, but function similarly to event tables when used with the NHD-RIT.
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Technical Benefits
• Hides the complexity of the dynamic segmentation model
• Provides a user-friendly interface• All ArcView functions still available
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Management Benefits
• Data integration improves decision making• Reduces Costs :
• tool can be used by non-GIS staff• overall reduced time/effort to create maps• tool and data are available for free• ArcView vs. ArcInfo
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Waters listed under the Clean Water Act Section 303(d) (1998)
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http://fish.rti.org
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Georeferenced BeachesState of California
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More Information & Training
NHD-RIT and reach indexing web site: http://georef.rti.org/
NHD web site:http://nhd.usgs.gov/