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This dataset was created to increase awareness of natural hazards, to be used within risk assessments, and to be used to identify, prioritize, and implement... |
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This dataset was created to increase awareness of natural hazards, to be used within risk assessments, and to be used to identify, prioritize, and implement... |
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This project was funded by a U.S. Federal Emergency Management Agency Cooperating Technical Partnership grant. |
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This study provides Oregon communities with new information about the natural hazards from channel migration. During 2023 and 2024, the Oregon Department of Geology and Mineral Industries (DOGAMI) produced channel migration zone maps for the Zigzag River in Clackamas County. This polygon represents the channel migration zone (CMZ). It identifies the area within which a given stream is most likely to move laterally and change its channel course during the next 30- and 100-years. The CMZ is comprised of the combined active channel; historical migration area; low, medium, and high erosion hazard areas; and avulsion hazard area. |
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REPORT DATA: This product is for informational purposes and may not have been prepared for or be suitable for legal, engineering, or surveying purposes. Users of this information should review or consult the primary data and information sources to ascertain the usability of the information. This publication cannot substitute for site-specific investigations by qualified practitioners. Site-specific data may give results that differ from the results shown in the publication. See the accompanying text report for more details on the limitations of the methods and data used to prepare this publication. |
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Channel migration zone for the Zigzag River, Clackamas County, Oregon |
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["geoscientificinformation","elevation","counties","riparian areas","alluvium","fluvial","erosion","river","natural disasters","river channel","deposition","flood","floodplains","stream","watershed","United States","North America","Oregon","Clackamas"] |
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en-US |
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