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R-Factor for Alaska

Metadata Updated: March 15, 2024

The rainfall-runoff erosivity factor (R-Factor) quantifies the effects of raindrop impacts and reflects the amount and rate of runoff associated with the rain. The R-factor is one of the parameters used by the Revised Unified Soil Loss Equation (RUSLE) to estimate annual rates of erosion. This product is a raster representation of R-Factor derived from isoerodent maps published in the Runoff Estimates for Small Rural Watersheds and Development of a Sound Design method. Volume II. (Fletcher et al., 1977). Lines connecting points of equal rainfall erosivity are called isoerodents. The isoerodents plotted on a map of Alaska were digitized, then values between these lines were obtained by linear interpolation. The final R-Factor data are in raster GeoTiff format at 800 meter resolution in Albers Conic Equal Area,WGS84, WGS84.

Access & Use Information

License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

Downloads & Resources

Dates

Metadata Date February 29, 2024
Metadata Created Date November 12, 2020
Metadata Updated Date March 15, 2024
Reference Date(s) June 6, 2014 (publication)
Frequency Of Update notPlanned

Metadata Source

Harvested from NOS OCM

Additional Metadata

Resource Type Dataset
Metadata Date February 29, 2024
Metadata Created Date November 12, 2020
Metadata Updated Date March 15, 2024
Reference Date(s) June 6, 2014 (publication)
Responsible Party NOAA Office for Coastal Management (Point of Contact, Custodian)
Contact Email
Guid gov.noaa.nmfs.inport:48223
Access Constraints Cite As: Office for Coastal Management, [Date of Access]: R-Factor for Alaska [Data Date Range], https://www.fisheries.noaa.gov/inport/item/48223., Access Constraints: None, Use Constraints: None, Distribution Liability: Any conclusions drawn from the analysis of this information are not the responsibility of NOAA, the Office for Coastal Management or its partners.
Bbox East Long -123.346463
Bbox North Lat 71.40623
Bbox South Lat 52.510506
Bbox West Long 167.930127
Coupled Resource
Frequency Of Update notPlanned
Harvest Object Id efafc0a7-7d27-4d01-825b-947ddfa9ab6a
Harvest Source Id c0121fd9-df15-4168-ac04-42f6e36a794d
Harvest Source Title NOS OCM
Licence NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose.
Lineage
Metadata Language eng
Metadata Type geospatial
Old Spatial {"type": "Polygon", "coordinates": [[[167.930127, 52.510506], [-123.346463, 52.510506], [-123.346463, 71.40623], [167.930127, 71.40623], [167.930127, 52.510506]]]}
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True
Temporal Extent Begin 1965
Temporal Extent End 1975

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