US Forest Service Research & Development
Contact Information
  • US Forest Service Research & Development
  • 1400 Independence Ave., SW
  • Washington, D.C. 20250-0003
  • 800-832-1355
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Adelaide Johnson

Adelaide (Di) C. Johnson, Ph.D.

Professional Hydrologist
11175 Auke Lake Way
United States

Phone: 907-586-8819
Contact Adelaide (Di) C. Johnson, Ph.D.

Current Research

In my current work, I am evaluating metrics to determine the effectiveness of channel restoration and am measuring the sources of carbon in the hydrologic cycle. I also am assessing alpine timberline advance by evaluating site temperature, site moisture, plant water relations, and stomatal conductance.

Research Interests

Multi-scales of hydrology, from water in individual plants to evaluation of water amount and quality in soils and stream systems; abiotic (nonliving) and biotic (living) linkages; and the role of disturbance in habitat and microsite creation.

Past Research

My past research has focused on landslide initiation, runout, and deposition in old-growth, second-growth, clearcut, and yellow cedar decline forests; effects of landslide dam-break floods on channel morphology; and effects of disturbance on tree species, throughfall, and large woody debris recruitment in channels.

Why This Research is Important

My research is working toward an understanding of whole-system water relationships, which is integral to detecting influences of both management practices and climate change on water and forest pattern. A better understanding of factors influencing water can help us to develop improved restoration techniques and to guide strategies for planning into the future.


  • Portland State University, Ph.D. Environmental Studies and Management 2013
  • Johns Hopkins University, M.A. Environmental Engineering 1996
  • University of Washington, M.S. Ecosystem Analysis 1991
  • Hartwick College, B.S. Geology 1982

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Last updated on : 02/13/2020