Faculty and Staff

Han-Sup Han – Professor, Forest Operations and Engineering

Personal and Research Interest

Forest Operations involves in the application of a variety of forest management tools and processes to achieve the objectives of sustainable forest management. Traditionally, wood production has been the main objective of timber extraction practices to supply raw materials (i.e., logs and wood chips) to the forest products manufacturing companies. While this still holds as an important goal of timber harvesting today, equipment and systems used in forest operations are now often employed to address other forest management issues such as stand condition improvement and fuel treatments to reduce wildfire risks. The use of harvesting systems as a tool to a wide range of forest management objectives is now increasingly common, as we often deal with man-made or second-growth stands. Forest operations need to be viewed as an integrated component of forest management and not an isolated field of study. Collaboration with other disciplines is increasingly important in order to address the challenging multiple objectives of today’s forest management.

Current research efforts focus on the production of quality feedstocks from forest residues and development of innovative biomass feedstock logistic systems. Along with this effort, he is looking at the maximum utilization and value recovery from forest residues resulting from thinning treatments and timber operations. Recently, Han, along with 13 Co-PIs (Principal Investigators) and research partners, has received a $5.88 million grant from the U.S. Department of Energy to conduct an innovative biomass research project (http://wastetowisdom.com/). Han, as the PI, has been taking the lead on their research efforts while conducting his own research projects in feedstock development.

Education and Degrees
Courses Taught
Selected Publications

See C.V. below to view a complete list of publications

Lee, E. and H.-S. Han. 2017. Air Curtain Burners: A tool for disposal of forest residues. Forests, 8, 296; doi:10.3390/f8080296

Jang, W. D. Page-Dumroese, and H.-S. Han. 2017. Soil physical and chemical property changes associated with heat transfer from burning woody residues in an Air Curtain Burner or slash piles in northern California, USA. Forests, 8, 297; doi:10.3390/f8080297

Woo, H. and H.-S. Han. 2017. Performance of screening biomass feedstocks using star and deck screen machines Applied Engineering in Agriculture. ASABE special collection publication (Accepted and in press).

Kizha, A.R., H.-S. Han, J Paulson, and A. Koirala. 2017. Strategies for reducing moisture content in forest residues at the harvest site. Applied Engineering in Agriculture. ASABE special collection publication (Accepted and in press)

Lee, E., J. Bisson and H.-S. Han. 2017. Evaluating the production cost and quality of feedstock produced by a sawdust machine. Biomass & Bioenergy. doi: 10.1016/j.biombioe.2017.06.010.

Seo, Y., H.-S. Han, T. Bilek, J. Choi, D. Cha, J. Lee. 2017. Economic analysis of a small-sized combined heat and power plant using forest biomass. Forest Science and Technology. doi: 10.1080/21580103.2017.1350209.

Kizha, A.R., H.-S. Han. 2017. Moisture content in forest residue piles: An insight on sampling methods and procedures. Current Forestry Reports. 3(1):1-11. doi 10.1007/s40725-017-0060-5.

Han, S.-K., H-S. Han, and W. Elliott, and T. Bilek. 2016. ThinTool: A spreadsheet model to evaluate fuel reduction thinning cost, net energy output, and nutrient impacts. Forest Science. doi: 10.5849/forsci.2016-018.

Berrill, J.-P. and H.-S. Han. 2016. Carbon, harvest yields, and residues from restoration in a mixed forest on California’s Coast Range. Forest Science. doi: 10.5849/forsci.16-061.

Kizhakkepurakkal, A. and H.-S. Han. 2016. Processing and sorting forest residues: Cost, productivity and managerial impacts. Biomass & Bioenergy. Vol.93:97-106.

Kizhakkepurakkal, A. and H.-S. Han. 2016. Developing allometric equation for coastal redwood (Sequoia sempervirens). Forests, 7, 96; doi:10.3390/f7050096.

Woo, H, and H.-S. Han. 2016. Evaluation of two screening systems (Star and Deck) for productivity, fuel consumption, and size distributions. Submitted to Biomass and Bioenergy.

Bisson, J. and H.-S. Han. 2016. Quality of feedstock produced from sorted forest residues.American Journal of Biomass and Bioenergy. Vol.5(2):81-97.

Bisson, J., S.-K. Han, and H.-S. Han. 2016. Evaluating the system logistics of a biomass recovery operation in northern California. Forest Products Journal. Vol.66(1/2):88–96.

Montgomery, T. and H.-S. Han. 2016. A. Kizhakkepurakkal. A GIS-based method for locating and planning centralized biomass grinding operations. Biomass & Bioenergy. Vol.85:262-270.

Kizhakkepurakkal A. R. and H.-S. Han. 2015. Actual biomass recovered: comparing whole-tree and tree-length harvesting methods.European Journal of Forest Engineering, Vol.1(2):46-55.

Kizhakkepurakkal A. R., H.-S. Han, T. Montgomery, A. Hohl and J. Bisson. 2015. Determining cost zones and hot spots for procuring feedstock for woody biomass-based power plants in northern California. California Agriculture Journal. Vol. (69): 184-190.

Han, S.-K., H.-S. Han, and J. Bisson. 2015. Effects of grate size on grinding productivity, fuel consumption, and particle size distribution. Forest Products Journal. Vol. (65): 209-216.

Han, H.-S., R. Bergman, E. Oneil, I. Eastin and L. Johnson. 2015. Cradle-to-gate life cycle impacts of redwood forest resource harvesting in northern California. Journal of Cleaner Production. Vol. 99: 217-229.

» Download the full curriculum vitae (PDF) for Dr. Han-Sup Han.

Han-Sup Han
Contact Information:

Office: 209 Forestry Building
Email: hh30@humboldt.edu
Ph. 707.826.3725
Fax: 707.826.5634

Mailing Address:

Department of Forestry and Wildland Resources
1 Harpst Street