Metadata for Channel Migration Zone of the Yellowstone River

- Identification Information
- Data Quality Information
- Spatial Data Organization Information
- Spatial Reference Information
- Entity and Attribute Information
- Distribution Information
- Metadata Reference Information
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Identification Information:

Citation:
  Originator: DTM Consulting, Inc.; Bozeman, MT
  Publication date: 2009
  Title: Channel Migration Zone of the Yellowstone River
  Publication place: Helena, Montana
  Publisher: Montana State Library
  Online linkage: ftp://ftp.geoinfo.msl.mt.gov/Data/Spatial/NonMSDI/Collections/Yellowstone_River_Clearinghouse/Geodatabases/Yellowstone_CMZ.zip
Abstract:
  This is an ESRI personal geodatabase containing the Channel Migration Zone (CMZ) developed for the Yellowstone River. The CMZ extends from Gardiner, Montana to the River's confluence with the Missouri River in McKenzie County, North Dakota. Also included are the various datasets used in the development of the CMZ, such as geology designations and channel migration vectors.
  CMZ mapping is based on the understanding that rivers are dynamic and move laterally across their floodplains through time. As such, over a given time period, rivers occupy a corridor area whose width is dependent on rates of channel shift. This dataset includes polygons representing areas likely to be affected by channel movement.
  The primary layer in this geodatabase is CMZ_complete, which shows the regions within the CMZ classified as to whether they are in the 2001 channel, the Avulsion Hazard Zone (AHZ), the Historic Migration Zone (HMZ), Alluvium, High Terrace, Low Terrace, or Outwash Terrace. Each classification may additionally be specified as being in a Restricted Migration Area (RMA), meaning that there are artificial bank protection features between the river and the RMA region.
  Avulsion Hazard Zones (AHZ) are areas of rapid channel avulsion. Alluvium and the three Terrace types are all areas of slow channel migration, which are collectively called "erosion buffers." Erosion buffer widths are dependent on the local geology type and the rate of historic migration since 1950. Historic Migration Zones (HMZ) are areas previously occupied by the channel, based on the historic imagery.
  Other datasets in the geodatabase:
  CMZ_boundary_only -- This dataset shows the outer boundary of the CMZ, excluding Restricted Migration Areas.
  Geologic_Breaks -- represents the breaks used to differentiate geology when creating the erosion buffers of the CMZ. Because channel migration rates are dependent on local geology, erosion buffer widths are also variable. Each line in the dataset represents a hand-drawn boundary between two geology types and, consequently, erosion buffers of different widths.
  Geology_Points -- represents the points used to identify geology when creating the erosion buffers of the CMZ. This point layer identifies the geology of the areas between the breaks.
  Migration Lines -- Three lines were drawn at each location, tracing the path of channel migration from 1950 to 2001. The average length of the three lines determined the migration distance at that location. This distance, as well as local geology, determined the erosion buffer width at that location.
  RMA_Lines -- lines representing obstructions within the Channel Migration Zone. They are a demarcation of bank protection features in the floodplain that restrict natural channel migration. This feature class was used to cut the CMZ polygons so areas behind bank protection features could be attributed as RMAs.
  Buffers -- is a table that shows the buffer distances applied within each reach of the study area to the 2001 channel to created the CMZ.
Purpose:
  Data was developed to support the Yellowstone River Cumulative Effects Study, and to assist the Yellowstone River Conservation District Council in their efforts developing best management practices.
Time period of content:
  Calendar date: 2009
  Currentness reference: publication date
Status:
  Progress: Complete
  Maintenance and update frequency: None planned
Access constraints: None
Use constraints:
  The corridor delineations presented in this geodatabase are intended to provide a basic screening tool to help guide and support management decisions within the Yellowstone River corridor. The expanse of the project area requires that the results are broad-scale in nature, and therefore less precise than highly detailed site-specific analyses. The results are unequivocally not intended to replace or override site-specific assessments; conversely, they are intended to highlight areas that would warrant such assessments as necessary.
  The Montana State Library provides this product/service for informational purposes only. The Library did not produce it for, nor is it suitable for legal, engineering, or surveying purposes. Consumers of this information should review or consult the primary data and information sources to ascertain the viability of the information for their purposes. The Library provides these data in good faith but does not represent or warrant its accuracy, adequacy, or completeness. In no event shall the Library be liable for any incorrect results or analysis; any direct, indirect, special, or consequential damages to any party; or any lost profits arising out of or in connection with the use or the inability to use the data or the services provided. The Library makes these data and services available as a convenience to the public, and for no other purpose. The Library reserves the right to change or revise published data and/or services at any time.
Point of contact:
  Jim Robinson
  Montana DNRC
  PO Box 201601
  Helena, MT 59620-1601
  Telephone: (406) 444-4247
  E-Mail: jrobinson@mt.gov
Data set credit:
  Data was prepared by Applied Geomorphology, Inc. and DTM Consulting, Inc. for the Yellowstone River Conservation District Council.

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Data Quality Information:

Lineage:
  Process step:
    Banklines from 1950s, 1970s, 1990s and 2001 image sets were converted to polygons and combined; this became the Historic Migration Zone (HMZ).
    2001 imagery was compared to that of the 1950s to locate areas of channel migration. At each migration area, three lines were drawn that connected the 1950s bank to its 2001 location. The lengths of the three lines were averaged and recorded.
    Different erosion buffers were created based on the mapped and/or interpreted geology and the migration rates evident since the 1950s. The HMZ and erosion buffers comprise the CMZ.
    Avulsion Potential Zones (APZs) were added later based on an interpretation of the imagery and elevation data. Areas of the CMZ isolated from the 2001 river channel by bank and floodplain protection features were tagged as Restricted Migration Areas (RMAs).
  Process date: 2008
  Process contact:
    Tony Thatcher
    DTM Consulting, Inc.
    211 N Grand Suite J
    Bozeman, MT 59715
    Telephone: 406-585-5322
    E-Mail: tony@dtmgis.com

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Spatial Data Organization Information:

Point and vector object information:
  SDTS object type: G-polygon
    SDTS object count: 9250

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Spatial Reference Information:

Horizontal coordinate system definition:
  Grid coordinate system name: State Plane Coordinate System
  SPCS zone identifier: 2500
  Lambert conformal conic:
  Standard parallel: 45.000000
  Standard parallel: 49.000000
  Longitude of central meridian: -109.500000
  Latitude of projection origin: 44.250000
  False easting: 600000.000000
  False northing: 0.000000
  Planar distance units: meters
  Geodetic model:
    Horizontal datum name: North American Datum of 1983
    Ellipsoid name: Geodetic Reference System 80
    Semi-major axis: 6378137.000000
    Denominator of flattening ratio: 298.257222

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Entity and Attribute Information:

Entity type label: CMZ_complete
  Attribute label: OBJECTID
    Attribute definition: Internal feature number.
  Attribute label: Shape
    Attribute definition: Feature geometry.
  Attribute label: Reach_ID
    Attribute definition: Reach identifier.
  Attribute label: CMZ_TYPE
    Attribute definition: Portion of the CMZ represented by the polygon.

    Attribute Value | Definition of Attribute Value
    2001 Channel | 2001 Channel of the Yellowstone River
    HMZ | Historic Migration Zone -- areas historically occupied by the river channel.
    HMZ RMA | Historic Migration Zone protected by artificial bank protection features
    AHZ | Avulsion Hazard Zone -- areas of rapid channel avulsion
    AHZ RMA | Avulsion Hazard Zone protected by artificial bank protection features
    Alluvium | Alluvium -- area of potential slow channel migration
    Alluvium RMA | Alluvium protected by artificial bank protection features
    Low Terrace | Low Terrace -- area of potential slow channel migration
    Low Terrace RMA | Low Terrace protected by artificial bank protection features
    High Terrace | High Terrace -- area of potential slow channel migration
    High Terrace RMA | High Terrace protected by artificial bank protection features
    Outwash Terrace | Outwash Terrace -- area of potential slow channel migration

  Attribute label: Shape_Length
    Attribute definition: Length of feature in internal units.
  Attribute label: Shape_Area
    Attribute definition: Area of feature in internal units squared.
Entity type label: Migration_Lines
  Attribute label: OBJECTID
    Attribute definition: Internal feature number.
  Attribute label: Shape
    Attribute definition: Feature geometry.
  Attribute label: MATERAIL_TYPE
    Attribute definition: Material that the river is migrating into.
  Attribute label: COMMENTS
    Attribute definition: Description of the channel migration line.
  Attribute label: REACH_ID
    Attribute definition: Reach identifier.
  Attribute label: SITE_ID
    Attribute definition:
      Each site contains 3 migration lines. This Site ID number identifies each trio of lines.
  Attribute label: FIELD
    Attribute definition: Field access notes.
  Attribute label: Shape_Length
    Attribute definition: Length of feature in internal units.

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Distribution Information:

Distributor:
  Montana State Library
  PO Box 201800
  Helena, MT 59620-1800
  Telephone: 406-444-5354
  TDD/TTY telephone: 406-444-4799
  Fax: 406-444-0266
  E-Mail: geoinfo@mt.gov
Resource description: Downloadable Data
Distribution liability:
  The Montana State Library provides this product/service for informational purposes only. The Library did not produce it for, nor is it suitable for legal, engineering, or surveying purposes. Consumers of this information should review or consult the primary data and information sources to ascertain the viability of the information for their purposes. The Library provides these data in good faith but does not represent or warrant its accuracy, adequacy, or completeness. In no event shall the Library be liable for any incorrect results or analysis; any direct, indirect, special, or consequential damages to any party; or any lost profits arising out of or in connection with the use or the inability to use the data or the services provided. The Library makes these data and services available as a convenience to the public, and for no other purpose. The Library reserves the right to change or revise published data and/or services at any time.
Standard order process:
  Digital form:
    Format name: ESRI Personal Geodatabase
    Online option:
    ftp://ftp.geoinfo.msl.mt.gov/Data/Spatial/NonMSDI/Collections/Yellowstone_River_Clearinghouse/Geodatabases/Yellowstone_CMZ.zip

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Metadata Reference Information:

Metadata date: 11/15/2013
Metadata review date: 04/17/2013
Metadata review date: 2008
Metadata contact:
  Tony Thatcher
  DTM Consulting, Inc.
  211 N Grand Suite J
  Bozeman, MT 59715
  Telephone: 406-585-5322
  E-Mail: tony@dtmgis.com

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