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Joshua C. Koch

Title: Research Hydrologist
Address: 4210 University Dr., Anchorage, AK 99508-4626
Phone: (907) 786-7119
Fax: (907) 786-7150

Image of Joshua C. Koch

Education and/or Training

PhD2010University of Colorado, Boulder, COCivil, Environmental, and Architectural Engineering
MS2005University of Arizona, Tucson, AZDepartment of Hydrology
BA2001Wesleyan University, Middletown, CTEarth and Environmental Sciences

Areas of Specialization and/or Research Interests

Surface water / groundwater interactions; hyporheic hydrology and biogeochemistry; carbon, nitrogen, and phosphorus cycling; flow above/through frozen ground; soil pipe formation and transport; hydrologic modeling.

Professional Experience

2011 - PresentResearch Hydrologist, U.S. Geological Survey (USGS), Anchorage, AK
2006 - 2011Student Hydrologist, Branch of Regional Research, USGS, Boulder, CO
2005 - 2006 Research Assistant, Institute of Alpine and Arctic Research, University of Colorado, Boulder
2003 - 2005Research Assistant, Semi-Arid Hydrology and Riparian Areas, University of Arizona, Tucson, AZ
2002 - 2003Hydrologist Intern, Branch of Regional Research, USGS, Lakewood, CO
2001 - 2002Hydrologist Intern, MA-RI Water District, USGS, Northborough, MA

Professional Activities and/or Memberships

American Geophysical Union, Hydrology and Cryosphere Sections
American Water Resources Association - Alaska Chapter
Association of Polar Early Career Scientists

Websites of Interest

Arctic-Boreal Catchment Studies


Total pubs: 28

Koch, J. C., T. F. Fondell, S. M. Laske, and J. A. Schmutz. 2018. Nutrient dynamics in partially drained arctic thaw lakes. Journal of Geophysical Research: Biogeosciences 123(2):440-452. doi:10.1002/2017JG004187 [Details] [Full Publication]

Burke, S. M., C. E. Zimmerman, B. A. Branfireun, J. C. Koch, and D. K. Swanson. 2018. Patterns and controls of mercury accumulation in sediments from three thermokarst lakes on the Arctic Coastal Plain of Alaska. Aquatic Sciences 80(1). doi:10.1007/s00027-017-0553-0 [Details] [Full Publication]

Uher-Koch, B. D., J. C. Koch, K. W. Wright, and J. A. Schmutz. 2018. Comparative nest survival of three sympatric loon species breeding in the Arctic. Journal of Avian Biology. doi:10.1111/jav.01671 [Details] [Full Publication]

Wickland, K. P., M. P. Waldrop, G. R. Aiken, J. C. Koch, M. T. Jorgenson, and R. Striegl. 2018. Dissolved organic carbon and nitrogen release from boreal Holocene permafrost and seasonally frozen soils of Alaska. Environmental Research Letters 13(6):065011. doi:10.1088/1748-9326/aac4ad [Details] [Full Publication]

Koch, J. C., M. T. Jorgenson, K. P. Wickland, M. Z. Kanevskiy, and R. Striegl. 2018. Ice wedge degradation and stabilization impacts water budgets and nutrient cycling in Arctic trough ponds. Journal of Geophysical Research: Biogeosciences In Press. doi:10.1029/2018JG004528 [Details] [Full Publication]

O'Donnell, J. A., C. E. Zimmerman, M. P. Carey, and J. C. Koch. 2017. Potential effects of permafrost thaw on arctic river ecosystems. Alaska Park Science 16(1):47-49. [Details] [Full Publication]

Koch, J. C., R. C. Toohey, and D. M. Reeves. 2017. Tracer-based evidence of heterogeneity in subsurface flow and storage within a boreal hillslope. Hydrological Processes 31(13):2453-2463. doi:10.1002/hyp.11205 [Details] [Full Publication]

Laske, S. M., T. B. Haynes, A. E. Rosenberger, J. C. Koch, M. S. Wipfli, M. Whitman, and C. E. Zimmerman. 2016. Surface water connectivity drives richness and composition of Arctic lake fish assemblages. Freshwater Biology. doi:10.1111/fwb.12769 [Details] [Full Publication]

Koch, J. C. 2016. Lateral and subsurface flows impact Arctic Coastal Plain lake water budgets. Hydrological Processes 30(21):3918-3931. doi:10.1002/hyp.10917 [Details] [Full Publication]

Brown, D. R. N., M. T. Jorgenson, K. Kielland, D. L. Verbyla, A. Prakash, and J. C. Koch. 2016. Landscape effects of wildfire on permafrost distribution in interior Alaska derived from remote sensing. Remote Sensing 8(8):654. doi:10.3390/rs8080654 [Details] [Full Publication]

Toohey, R. C., N. M. Herman-Mercer, P. F. Schuster, E. A. Mutter, and J. C. Koch. 2016. Multidecadal increases in the Yukon River Basin of chemical fluxes as indicators of changing flowpaths, groundwater, and permafrost. Geophysical Research Letters 43(23):12,120-12,130. doi:10.1002/2016GL070817 [Details] [Full Publication]

Lewis, T. L., M. S. Lindberg, J. A. Schmutz, P. J. Heglund, J. Rover, J. C. Koch, and M. R. Bertram. 2015. Pronounced chemical response of Subarctic lakes to climate-driven losses in surface area. Global Change Biology 21:1140-1152. doi:10.1111/gcb.12759 [Details] [Full Publication]

Kohler, T. J., L. F. Stanish, S. W. Crisp, J. C. Koch, D. Liptzin, J. L. Baeseman, and D. M. McKnight. 2015. Life in the main channel: long-term hydrologic control of microbial mat abundance in McMurdo Dry Valley Streams, Antarctica. Ecosystems 18(2):310-327. doi:10.1007/s10021-014-9829-6 [Details] [Full Publication]

Van Hemert, C. R., P. L. Flint, M. S. Udevitz, J. C. Koch, T. C. Atwood, K. L. Oakley, and J. M. Pearce. 2015. Forecasting wildlife response to rapid warming in the Alaskan Arctic. BioScience 65(7):718-728. doi:10.1093/biosci/biv069 [Details] [Full Publication]

McKnight, D. M., K. Cozzetto, J. D. S. Cullis, M. N. Gooseff, C. Jaros, J. C. Koch, W. B. Lyons, R. M. Neupauer, and A. Wlostowski. 2015. Potential for real-time understanding of coupled hydrologic and biogeochemical processes in stream ecosystems: Future integration of telemetered data with process models for glacial meltwater streams. Water Resources Research 51. doi:10.1002/2015WR017618 [Details] [Full Publication]

Jorgenson, M. T., M. Z. Kanevskiy, Y. Shur, N. Moskalenko, D. R. N. Brown, K. P. Wickland, R. Striegl, and J. C. Koch. 2015. Role of ground ice dynamics and ecological feedbacks in recent ice wedge degradation and stabilization. Journal of Geophysical Research: Earth Surface 120(11):2280-2297. doi:10.1002/2015JF003602 [Details] [Full Publication]

Koch, J. C., K. Gurney, and M. S. Wipfli. 2014. Morphology-dependent water budgets and nutrient fluxes in Arctic thaw ponds. Permafrost and Periglacial Processes 25(2):79-93. doi:10.1002/ppp.1804 [Details] [Full Publication]

Johnston, C. E., S. A. Ewing, J. W. Harden, R. K. Varner, K. P. Wickland, J. C. Koch, C. C. Fuller, K. L. Manies, and M. T. Jorgenson. 2014. Effect of permafrost thaw on carbon dioxide and methane exchange across a peatland chronosequence in western Alaska. Environmental Research Letters 9:085004. doi:10.1088/1748-9326/9/8/085004 [Details] [Full Publication]

Koch, J. C., C. P. Kikuchi, K. P. Wickland, and P. F. Schuster. 2014. Runoff sources and flow paths in a partially burned, upland boreal catchment underlain by permafrost. Water Resources Research 50(10):8141-8158. doi:10.1002/2014WR015586 [Details] [Full Publication]

Callegary, J. B., C. P. Kikuchi, J. C. Koch, M. R. Lilly, and S. A. Leake. 2013. Review: Groundwater in Alaska (USA). Hydrogeology Journal 21(1):25-39. doi:10.1007/s10040-012-0940-5 [Details] [Full Publication]

Koch, J. C., S. A. Ewing, R. Striegl, and D. M. McKnight. 2013. Rapid runoff via shallow throughflow and deeper preferential flow in a boreal catchment underlain by frozen silt (Alaska, USA). Hydrogeology Journal 21(1):93-106. doi:10.1007/s10040-012-0934-3 [Details] [Full Publication]

Koch, J. C., R. L. Runkel, R. Striegl, and D. M. McKnight. 2013. Hydrologic controls on the transport and cycling of carbon and nitrogen in a boreal catchment underlain by continuous permafrost. Journal of Geophysical Research: Biogeosciences 118(2):698-712. doi:10.1002/jgrg.20058 [Details] [Full Publication]

Jones, B. M., C. L. Amundson, J. C. Koch, and G. Grosse. 2013. Thermokarst and thaw-related landscape dynamics - An annotated bibliography with an emphasis on potential effects on habitat and wildlife. USGS Open-File Report 2013-1161. [Details] [Full Publication]

Jorgenson, M. T., J. W. Harden, M. Z. Kanevskiy, J. A. O'Donnell, K. P. Wickland, S. A. Ewing, K. L. Manies, Q. Zhuang, Y. Shur, R. Striegl, and J. C. Koch. 2013. Reorganization of vegetation, hydrology and soil carbon after permafrost degradation across heterogeneous boreal landscapes. Environmental Research Letters 8(3):035017. [Details] [Full Publication]

Pearce, J. M., A. R. DeGange, P. L. Flint, T. F. Fondell, D. D. Gustine, L. E. Holland-Bartels, A. G. Hope, J. W. Hupp, J. C. Koch, J. A. Schmutz, S. L. Talbot, D. H. Ward, and M. E. Whalen. 2012. Changing Arctic Ecosystems - Measuring and forecasting the response of Alaska's terrestrial ecosystem to a warming climate. USGS Fact Sheet 2012-3144, 4 p. [Details] [Full Publication]

Jepsen, S. M., J. C. Koch, J. R. Rose, C. I. Voss, and M. A. Walvoord. 2012. Thermal and hydrological observations near Twelvemile Lake in discontinuous permafrost, Yukon Flats, interior Alaska, September 2010-August 2011. USGS Open-File Report 2012-1121, 25 p. [Details] [Full Publication]

Koch, J. C., D. M. McKnight, and R. M. Neupauer. 2011. Simulating unsteady flow, anabranching, and hyporheic dynamics in a glacial meltwater stream using a coupled surface water routing and groundwater flow model. Water Resources Research 47:W05530. doi:10.1029/2010WR009508 [Details] [Full Publication]

Koch, J. C., D. M. McKnight, and J. L. Baeseman. 2010. Effect of unsteady flow on nitrate loss in an oligotrophic, glacial meltwater stream. Journal of Geophysical Research: Biogeosciences 115:G01001. [Details]

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