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🔗 Source: waterboards.ca.gov
📊 Size: 1.34 MB
📄 Pages: 18 pages
⬇️ Downloads: 269

Summary

By analyzing flood deposits from four sites, researchers assigned minimum ages through tree-ring dating of living and flood-killed conifers, and maximum ages via radiocarbon dating of deposited material. The December 1964 floods served as a reference point. Results indicate severe floods comparable to December 1964 occurred multiple times in the last few hundred years, demonstrating that historical flood records in the region are incomplete without geological evidence. The study confirms that such extreme events are not rare in northern California's hydrological history.

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Description

Let me start by looking at the title and authors. The title is about historic flood information for northern California streams using geological and botanical evidence. The authors are Edward J. Helley and Valmore C. Lamarche, Jr. The document is a USGS Professional Paper 485-E, prepared with the California Department of Water Resources.

The content sections include an abstract, introduction, climate, surface-water hydrology, the 1964 floods, methods like tree-ring dating and radiocarbon dating

Technical Information

  • File Format: PDF
  • File Size: 1.34 MB
  • Pages: 18
  • Language: EN
  • Total Downloads: 269
  • Last Updated: 1 week ago

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