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Bureau of Land Management Lotic

Bureau of Land Management Lotic
ID: 8
  • Created: 12/10/2015
  • Updated:

Details of Bureau of Land Management Lotic

Here is a 100-row excerpt of the Bureau of Land Management Lotic design file to aid in understanding what the data looks like. You may download the entire file (38.5 MB).



Design Documentation for Bureau of Land Management Lotic

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Scott W. Miller, Ph.D., Director
BLM/USU National Aquatic Monitoring Center (aka The BugLab)
BLM-National Operations Center, Branch of Assessment and Monitoring
Department of Watershed Sciences
Utah State University
Logan, UT 84322-5210
Email: swmiller@blm.gov
Phone: 435.797.2612
Cell: 720.545.8367

BLM-National Operations Center, Branch of Assessment and Monitoring
Department of Watershed Sciences
Utah State University
Logan, UT 84322-5210

The target populations consists of all streams and rivers on western BLM lands having flowing water during the study index period excluding portions of tidal rivers up to head of salt. The study index period extends from April/May to September and is generally characterized by low flow conditions.

The initial master sample draw was conducted for all streams and rivers throughout WA, OR, CA, ID, NV, AZ, NM, UT, CO, WY, MT, and SD. After this initial draw, sample points were clipped to BLM lands and reordered.

The sample frame was derived from the medium National Hydrography Dataset (NHD) version 2.0, in particular NHD-Plus (See appendix A for details regarding how the NHD was processed to define the sample frame). A summary of the F-codes, used directly from the NHD-Plus, included versus excluded from the sample frame are:

Included in sample frame:

  • 46006   Stream/River (Perennial)
  • 55800   Artificial Path (removed from dataset if coded through Lake/Pond and Reservoirs)

Excluded from sample frame:
  • 33600   Canal/Ditch
  • 33400   Connector
  • 46003   Stream/River (Intermittent)
  • 42800   Pipeline
  • 42802   Pipeline: Pipeline Type = Aqueduct; Relationship to Surface = Elevated
  • 42801   Pipeline: Pipeline Type = Aqueduct; Relationship to Surface = At or Near
  • 42803   Pipeline: Pipeline Type = Aqueduct; Relationship to Surface = Underground
  • 42804   Pipeline: Pipeline Type = Aqueduct; Relationship to Surface = Underwater
  • 42806   Pipeline: Pipeline Type = General Case; Relationship to Surface = Elevated
  • 4280    Pipeline: Pipeline Type = General Case; Relationship to Surface = Underground
  • 42809   Pipeline: Pipeline Type = Penstock; Relationship to Surface = At or Near
  • 42811   Pipeline: Pipeline Type = Penstock; Relationship to Surface = Underground
  • 42813   Pipeline: Pipeline Type = Siphon
  • 56600   Coastline
  • 55800   Artificial Path if coded through Lake/Pond and Reservoirs

Attributes from NHD-Plus and additional attributes added to the sample frame that are used in the survey design are:
  • BLM land ownership - BLM ownership layer was downloaded from the BLM SMA layer, which was last update in July, 2015.

Point per 0.5 kilometer of perennial stream and river for polylines falling in WA, OR, CA, ID, NV, AZ, NM, UT, CO, WY, MT, and SD (Table 3); 1,084,427 total sample points.

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2015

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Attributes


PROJCS["USA_Contiguous_Albers_Equal_Area_Conic_USGS_version",GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Albers"],PARAMETER["False_Easting",0.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",-96.0],PARAMETER["Standard_Parallel_1",29.5],PARAMETER["Standard_Parallel_2",45.5],PARAMETER["Latitude_Of_Origin",23.0],UNIT["Meter",1.0]]

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