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Daniel Marion
Daniel Marion 

Employee Information
Name: Daniel Marion 
Title: Research Hydrologist
Unit: Center for Bottomland Hardwoods Research (4155)
Phone: 501-623-1180 Ext. 104
Fax: 501-623-0186 - Location Fax
E-Mail: dmarion@fs.fed.us

Location Information
Mailing
Address:		 USDA-Forest Service
Southern Research Station
P.O. Box 1270
Hot Springs, AR 71902
Shipping
Address:		 100 Reserve Street
Hot Springs AR 71901
Location
Phone:

Research Information

Education:
B.S., California State University Hayward, Geography, 1979; M.S., Oregon State University, Physical Geography, 1982; Ph.D., University of Iowa, Geoscience, 2001.

Current Research:
My research goals are to identify and characterize the primary watershed processes and landform structures affecting forested ecosystems in the Interior Highlands, and how forest management affects these processes and structures. To achieve these goals, my major research objectives are to: quantify the processes by which water, sediment, and nutrients move through forest ecosystems; determine their relative importance; determine how their relative importance varies at different space and time scales; determine how these processes are affected by forest management practices; and develop models for extrapolating research findings to other locations in the Interior Highlands.

My research focuses primarily on upland forested watersheds, encompassing spatial scales from 1 to 5,000 hectares, and processes that operate over time scales of less than one year to 100 years.

I have completed or have underway studies in the following topical areas: stream classification; mass erosion processes; sediment production from small, forested watersheds; the interactions between sediment processes and channel morphology; and the structural responses of channels to natural and human-induced disturbances.

Collaborative Research:
I accomplish most of my research through joint studies with other Forest Service, federal agency, university, and private industry scientists. We have or are currently working in the following topical areas:
  • Interactions among hydrology, organic carbon dynamics, and stream biota
  • Sediment storage locations, amounts, and residence times
  • Effects of forest fertilization on local and downstream water quality
  • Carbon budgets in the Mississippi River Basin
  • Hydraulic characteristics in high-gradient mountain streams
  • Compilation of historical water quality data from FS research sites
  • Effects of different timber harvesting methods on runoff and water quality
  • Nutrient uptake processes and watershed stressors
  • Effects of forest roads on water and sediment routing
  • Soil quality responses to forest management
  • Role of coarse woody debris in terrestrial and aquatic ecosystems
  • Effects of All-Terrain Vehicles on hillslopes and streams
  • Effects of dams on sediment storage and transport

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Daniel Marion

View a list of other employees in the Center for Bottomland Hardwoods Research (4155) Unit.