U.S. Department of the Interior U.S. Geological Survey Processing ArcHydro Datasets with NHDPlus Version 2, Emphasizing StreamStats Data Development Webinar.

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Presentation transcript:

U.S. Department of the Interior U.S. Geological Survey Processing ArcHydro Datasets with NHDPlus Version 2, Emphasizing StreamStats Data Development Webinar Series—Part 2 Alan Rea and Pete Steeves ID and MA-RI Water Science Centers USGS

Webinar Series Overview May 9—Concepts and Preprocessing May 23—ArcHydro Data Development June 6—Basin Characteristics June 19—StreamStats-specific Datasets and Tools NHDPlusV2—StreamStats Webinars May-June, 2012Page 2-2

Course Web Site DataPrepWorkshop/Workshop20 12/ NHDPlusV2—StreamStats Webinars May-June, 2012Page 2-3

Today’s Agenda Discussion of Exercise 1 Flow Accumulation Adjustment ArcHydro Local Processing (Post HydroDEM Tools) Building the Global geodatabase Take-home assignment: Exercise 2 NHDPlusV2—StreamStats Webinars May-June, 2012Page 2-4

Discussion of Exercise 1 Remember to turn on tool help Bad paths to.py files in toolbox Don’t put spaces in paths!! NHDPlusV2—StreamStats Webinars May-June, 2012Page 2-5

Flowaccumulation Adjustment Necessary where flow comes into a downstream hucpoly (RPU) Ensures fac is high enough to generate str grid Without str grid cells, delineation will not find upstream hucpolys NHDPlusV2—StreamStats Webinars May-June, 2012Page 2-6

Flowaccumulation Adjust NHDPlusV2—StreamStats Webinars May-June, 2012Page 2-7

NHDPlusV2—StreamStats Webinars May-June, 2012 Global Data Sets All in Global.mdb geodatabase –hucpoly (tile boundaries) –streams (network to connect tiles) –huc_net_junctions (node points at ‘streams’ confluences and outlets for tile hucpolys) –huc_net (geometric network) –hucpoint (point locations at outlets) not used in StreamStats Page 2-8

NHDPlusV2—StreamStats Webinars May-June, 2012 Tier 1 Consideration for Massachusetts Page 2-9

NHDPlusV2—StreamStats Webinars May-June, 2012 Tier 2 Consideration for Massachusetts Page 2-10

NHDPlusV2—StreamStats Webinars May-June, 2012 Global Network Page 2-11

NHDPlusV2—StreamStats Webinars May-June, 2012 Directory Structure Page 2-12

NHDPlusV2—StreamStats Webinars May-June, 2012Page 2-13

NHDPlusV2—StreamStats Webinars May-June, 2012Page 2-14

Take-home Exercise Flow Accumulation Adjustment ArcHydro Local Processing (Post HydroDEM Tools) including sinks and coastlines Building the Global geodatabase NHDPlusV2—StreamStats Webinars May-June, 2012Page 2-15

Exercise 1 NHDPlusV2—StreamStats Webinars May-June, 2012Page 2-16

Extra Credit NHDPlusV2—StreamStats Webinars May-June, 2012Page 2-17