Skip to main content
ARS Home » Pacific West Area » Tucson, Arizona » SWRC » People » Jason Williams
Christopher Jason Williams (Jason)

Research Hydrologist

C. Jason Williams/ARSUserFiles/39288/Jason_Williams.png
Research Hydrologist

Southwest Watershed Research Center
USDA-Agricultural Research Service
2000 E. Allen Road
Tucson, AZ  85719
Email: jason.williams@usda.gov

Research Interests

I am a Research Hydrologist with the USDA-ARS Southwest Watershed Research Center.  I study the effects of disturbances (e.g., plant community transitions, invasive species, climate impacts, and wildland fire) and conservation/restoration practices on vegetation, soils, and hydrologic and erosion processes spanning the rangeland to dry forest continuum in the western US. I also lead a team of scientists in the management and enhancement of the Rangeland Hydrology and Erosion Model and contribute substantively to advancement of other hydrology and erosion models. My research focuses on improving scientific understanding of eco-hydrologic and erosion processes and providing land management agencies, private landowners, and other entities with knowledge, models, and other tools to better assess and manage wildland resources. 

Current Projects

Education and Background

I have a diverse education and background in Natural Resources. I received an undergraduate degree in Forest Resources - Ecosystem Management from University of Idaho in 1996 and a graduate degree in Geology-Hydrologic Sciences from Boise State University in 2005. I received a doctoral degree in Water Resources from the University of Idaho in 2015. My earliest work in natural resources was with the USDA-Forest Service in Alaska, Idaho, and Washington and spanned multiple discipline areas including hydrology, integrated resource inventory, reforestation, silviculture, timber, and wildland fire fighting. I worked as a Hydrologic Technician for Boise State University in 2005-2006, researching streamflow generation, ground water and surface water interaction, and ecohydrologic feedbacks between vegetation, soil, and the atmosphere. My research with USDA-ARS began at the Northwest Watershed Research Center in Boise, ID, in 2006. There, I worked as a Hydrologist and Research Hydrologist spanning 2006-2016, conducting research on the impacts of wildland fire, woody plant encroachment, invasive weeds, and land management practices on vegetation, soils, and hydrologic and erosion processes for rangelands and dry forests. I began my current position as a Research Hydrologist at the Southwest Watershed Research Center in 2016.

Recent Publications

(for a complete list & full texts, see Research Gate and Google Scholar links above)

Wheeler, B., Webb, N., Williams, J., Faist, A., Edwards, B.E., Herrick, J., Lepak, N., Kachergis, E., McCord, S., Newingham, B., Pietrasiak, N. and Toledo, D. Integrating erosion models into land health assessments to better understand landscape condition. 2024. Rangeland Ecology and Management. https://doi.org/10.1016/j.rama.2024.05.003

Saeedimoghaddam, M., Nearing, G., Goodrich, D.C., Hernandez, M., Guertin, D.P., Metz, L.J., Wei, H., Ponce-Campos, G., Burns, S., McCord, S.E., Nearing, M.A., Williams, C.J., Houdeshell, C.-A., Rahman, M., Meles, M.B., and Barker, S. An artificial neural network to estimate the foliar and ground cover input variables of the Rangeland Hydrology and Erosion Model. 2024. Journal of Hydrology, 631, 130835. https://doi.org/10.1016/j.jhydrol.2024.130835

Spaeth, K.E., Rutherford, W.A., Houdeshell, C.-A., Williams, C.J., Simpson, B., Green, S., Toledo, D., Suffridge, E., and McCord, S.E. Insights from the USDA Grazing Land National Resources Inventory and field studies. 2024. Journal of Soil and Water Conservation, 79 (3), 37A-42A. https://doi.org/10.2489/jswc.2024.0107A

Al-Hamdan, O.Z., Williams, C.J., Pierson, F.B., Hernandez, M., and Nouwakpo, S.K. Estimating effective hydraulic conductivity (Ke) for the Rangeland Hydrology and Erosion Model (RHEM). 2024. Journal of the ASABE, 67 (1), 141-149. https://doi.org/10.13031/ja.15652

Zobell, R.A., Spaeth, K.E., Jr., Williams, C.J., Goodrich, S., Jacobson, B., Camp, C., and Cameron, A. Gradient analysis and classification of tall forb communities in the Bridger-Teton National Forest, United States. 2023. Rangeland Ecology and Management, 90, 294-307. https://doi.org/10.1016/j.rama.2023.04.002

Hart, S., Raymond, K., Williams, C.J., Rutherford, W.A., and DeGayner, J. Modeling earthen treatments for climate change effects. 2023. Heritage, 6 (5), 4214-4226. https://doi.org/10.3390/heritage6050222

Li, L., Nearing, M.A., Heilman, P., Nichols, M.H., Guertin, D.P., and Williams, C.J. Rangeland hillslope lengths: A case study at the Walnut Gulch Experimental Watershed, southeastern Arizona. 2022. International Soil and Water Conservation Research, 10 (4), 597-609. https://doi.org/10.1016/j.iswcr.2022.02.004

Williams, C.J., Pierson, F.B., Al-Hamdan, O.Z., Nouwakpo, S.K., Johnson, J.C., Polyakov, V.O., Kormos, P.R., Shaff, S.E., and Spaeth, K.E. Assessing runoff and erosion on woodland-encroached sagebrush steppe using the Rangeland Hydrology and Erosion Model. 2022. Ecosphere, 13 (6), e4145. https://doi.org/10.1002/ecs2.4145

Williams, C.J., and Nouwakpo, S.K. Introduction to the Special Issue “Ecohydrologic Feedbacks between Vegetation, Soil, and Climate”.  2022. Water (Switzerland), 14 (5), 760. https://doi.org/10.3390/w14050760

Al-Hamdan, O.Z., Pierson, F.B., Robichaud, P., Elliot, W.J., and Williams, C.J. New erodibility parameterization for applying WEPP on rangelands using ERMiT. 2022. Journal of the ASABE, 6 (2), 251-264. https://doi.org/10.13031/ja.14564

Spaeth, K.E., Jr., Barbour, P.J., Moranz, R., Dinsmore, S.J., and Williams, C.J. Asclepias dynamics on US rangelands: Implications for conservation of monarch butterflies and other insects. 2022. Ecosphere, 13 (1), e03816. https://doi.org/10.1002/ecs2.3816

Hart, S., Raymond, K., Williams, C.J., Johnson, J., DeGayner, J., and Guebard, M.C. Precipitation impacts on earthen architecture for better implementation of cultural resource management in the US Southwest. 2021. Heritage Science, 9 (1), 143. https://doi.org/10.1186/s40494-021-00615-z

Goodrich, D.C., Heilman, P., Nearing, M., Nichols, M., Scott, R.L., Williams, C.J., and Biederman, J. The USDA-Agricultural Research Service's long term agro-ecosystems Walnut Gulch Experimental Watershed, Arizona, USA. 2021. Hydrological Processes, 35 (9), e14349. https://doi.org/10.1002/hyp.14349

Schallner, J.W., Johnson, J.C., Williams, C.J., and Ganguli, A.C. Evaluation of a runoff monitoring methodology for rangelands: UBeTubes. 2021. Rangeland Ecology and Management, 78, 46-50. https://doi.org/10.1016/j.rama.2021.05.003

Johnson, J.C., Williams, C.J., Guertin, D.P., Archer, S.R., Heilman, P., Pierson, F.B., and Wei, H. Restoration of a shrub-encroached semi-arid grassland: Implications for structural, hydrologic, and sediment connectivity. 2021. Ecohydrology, 14 (4), e2281. https://doi.org/10.1002/eco.2281

Williams, C.J., Johnson, J.C., Pierson, F.B., Burleson, C.S., Polyakov, V.O., Kormos, P.R., and Nouwakpo, S.K. Long-term effectiveness of tree removal to re-establish sagebrush steppe vegetation and associated spatial patterns in surface conditions and soil hydrologic properties. 2020. Water (Switzerland), 12 (8), 2213. https://doi.org/10.3390/w12082213

Williams, C.J., Pierson, F.B., Kormos, P.R., Al-Hamdan, O.Z., and Johnson, J.C. Vegetation, ground cover, soil, rainfall simulation, and overland-flow experiments before and after tree removal in woodland-encroached sagebrush steppe: The hydrology component of the Sagebrush Steppe Treatment Evaluation Project (SageSTEP). 2020. Earth System Science Data, 12 (2), art. no. 80, 1347-1365. https://doi.org/10.5194/essd-12-1347-2020

Vega, S.P., Williams, C.J., Brooks, E.S., Pierson, F.B., Strand, E.K., Robichaud, P.R., Brown, R.E., Seyfried, M.S., Lohse, K.A., Glossner, K., Pierce, J.L., and Roehner, C. Interaction of wind and cold-season hydrologic processes on erosion from complex topography following wildfire in sagebrush steppe. 2020. Earth Surface Processes and Landforms, 45 (4), 841-861. https://doi.org/10.1002/esp.4778

Williams, C.J., Pierson, F.B., Nouwakpo, S.K., Al-Hamdan, O.Z., Kormos, P.R., and Weltz, M.A. Effectiveness of prescribed fire to re-establish sagebrush steppe vegetation and ecohydrologic function on woodland-encroached sagebrush rangelands, Great Basin, USA: Part I: Vegetation, hydrology, and erosion responses. 2020. Catena, 185, 103477. https://doi.org/10.1016/j.catena.2018.02.027. Corrigendum at https://doi.org/10.1016/j.catena.2020.104523

Nouwakpo, S.K., Williams, C.J., Pierson, F.B., Weltz, M.A., Kormos, P.R., Arslan, A., and Al-Hamdan, O.Z. Effectiveness of prescribed fire to re-establish sagebrush steppe vegetation and ecohydrologic function on woodland-encroached sagebrush rangelands, Great Basin, USA: Part II: Runoff and sediment transport at the patch scale. 2020. Catena, 185, 104301. https://doi.org/10.1016/j.catena.2019.104301

Kautz, M.A., Holifield Collins, C.D., Guertin, D.P., Goodrich, D.C., van Leeuwen, W.J., and Williams, C.J. Hydrologic model parameterization using dynamic Landsat-based vegetative estimates within a semiarid grassland. 2019. Journal of Hydrology, 575, 1073-1086. https://doi.org/10.1016/j.jhydrol.2019.05.044

Williams, C.J., Pierson, F.B., Nouwakpo, S.K., Kormos, P.R., Al-Hamdan, O.Z., and Weltz, M.A. Long-term evidence for fire as an ecohydrologic threshold-reversal mechanism on woodland-encroached sagebrush shrublands. 2019. Ecohydrology, 12 (4), e2086. https://doi.org/10.1002/eco.2086

Shin, S.S., Park, S.D., Pierson, F.B., and Williams, C.J. Evaluation of physical erosivity factor for interrill erosion on steep vegetated hillslopes. 2019. Journal of Hydrology, 571, 559-572. https://doi.org/10.1016/j.jhydrol.2019.01.064

Miller, R.F., Chambers, J.C., Evers, L., Williams, C.J., Snyder, K.A., Roundy, B.A., and Pierson, F.B. The ecology, history, ecohydrology, and management of pinyon and juniper woodlands in the great basin and northern Colorado plateau of the western United States. 2019. USDA Forest Service - General Technical Report - RMRS-GTR-403. 2019. 284 p.
https://doi.org/10.2737/RMRS-GTR-403

Edwards, B.L., Webb, N.P., Brown, D.P., Elias, E., Peck, D.E., Pierson, F.B., Williams, C.J., and Herrick, J.E. Climate change impacts on wind and water erosion on US rangelands. 2019. Journal of Soil and Water Conservation, 74 (4), 405-418. https://doi.org/10.2489/jswc.74.4.405

Williams, C.J., Pierson, F.B., Kormos, P.R., Al-Hamdan, O.Z., Nouwakpo, S.K., and Weltz, M.A. Vegetation, hydrologic, and erosion responses of sagebrush steppe 9 yr following mechanical tree removal. 2019. Rangeland Ecology and Management, 72 (1), 47-68. https://doi.org/10.1016/j.rama.2018.07.004

Williams, C.J., Snyder, K.A., and Pierson, F.B. Spatial and temporal variability of the impacts of pinyon and juniper reduction on hydrologic and erosion processes across climatic gradients in the western US: A regional synthesis. 2018. Water (Switzerland), 10 (11), 1607. https://doi.org/10.3390/w10111607

Chandler, D.G., Cheng, Y., Seyfried, M.S., Madsen, M.D., Johnson, C.E., and Williams, C.J. Seasonal wetness, soil organic carbon, and fire influence soil hydrological properties and water repellency in a sagebrush-steppe ecosystem. 2018. Water Resources Research, 54 (10), 8514-8527. https://doi.org/10.1029/2017WR021567

Larson-Nash, S.S., Robichaud, P.R., Pierson, F.B., Moffet, C.A., Williams, C.J., Spaeth, K.E., Brown, R.E., and Lewis, S.A. Recovery of small-scale infiltration and erosion after wildfires. 2018. Journal of Hydrology and Hydromechanics, 66 (3), 261-270. https://doi.org/10.1515/johh-2017-0056

Clark, P.E., Williams, C.J., and Pierson, F.B. Factors affecting efficacy of prescribed fire for western juniper control. 2018. Rangeland Ecology and Management, 71 (3), 345-355. https://doi.org/10.1016/j.rama.2018.02.002

Clark, P.E., Williams, C.J., Kormos, P.R., and Pierson, F.B. Postfire grazing management effects on mesic sagebrush-steppe vegetation: Mid-summer grazing. 2018. Journal of Arid Environments, 151, 104-112. https://doi.org/10.1016/j.jaridenv.2017.10.005

Hernandez, M., Nearing, M.A., Al-Hamdan, O.Z., Pierson, F.B., Armendariz, G., Weltz, M.A., Spaeth, K.E., Williams, C.J., Nouwakpo, S.K., Goodrich, D.C., Unkrich, C.L., Nichols, M.H., and Holifield-Collins, C.D. The Rangeland Hydrology and Erosion Model: A dynamic approach for predicting soil loss on rangelands. 2017. Water Resources Research, 53 (11), 9368-9391. https://doi.org/10.1002/2017WR020651

Nouwakpo, S.K., Weltz, M.A., McGwire, K.C., Williams, C.J., Osama, A.-H., and Green, C.H.M. Insight into sediment transport processes on saline rangeland hillslopes using three-dimensional soil microtopography changes. 2017. Earth Surface Processes and Landforms, 42 (4), 681-696. https://doi.org/10.1002/esp.4013

Kormos, P.R., Marks, D.G., Pierson, F.B., Williams, C.J., Hardegree, S.P., Boehm, A.R., Havens, S.C., Hedrick, A., Cram, Z.K., and Svejcar, T.J. Meteorological, snow, streamflow, topographic, and vegetation height data from four western juniper-dominated experimental catchments in southwestern Idaho, USA. 2017. Earth System Science Data, 9 (1), 91-98. https://doi.org/10.5194/essd-9-91-2017

Al-Hamdan, O.Z., Pierson, F.B., Nearing, M.A., Williams, C.J., Hernandez, M., Boll, J., Nouwakpo, S.K., Weltz, M.A., and Spaeth, K. Developing a parameterization approach for soil erodibility for the rangeland hydrology and erosion model (RHEM). 2017. Transactions of the ASABE, 60 (1), 85-94. https://doi.org/10.13031/trans.11559

Kormos, P.R., Marks, D., Pierson, F.B., Williams, C.J., Hardegree, S.P., Havens, S., Hedrick, A., Bates, J.D., and Svejcar, T.J. Ecosystem water availability in juniper versus sagebrush snow-dominated rangelands. 2017. Rangeland Ecology and Management, 70 (1), 116-128. https://doi.org/10.1016/j.rama.2016.05.003  

Williams, C.J., Pierson, F.B., Spaeth, K.E., Brown, J.R., Al-Hamdan, O.Z., Weltz, M.A., Nearing, M.A., Herrick, J.E., Boll, J., Robichaud, P.R., Goodrich, D.C., Heilman, P., Guertin, D.P., Hernandez, M., Wei, H., Polyakov, V.O., Armendariz, G., Nouwakpo, S.K., Hardegree, S.P., Clark, P.E., Strand, E.K., Bates, J.D., Metz, L.J., and Nichols, M.H. Application of Ecological Site information to transformative changes on Great Basin sagebrush rangelands. 2016. Rangelands, 38 (6), 379-388. https://doi.org/10.1016/j.rala.2016.10.004

Williams, C.J., Pierson, F.B., Kormos, P.R., Al-Hamdan, O.Z., Hardegree, S.P., and Clark, P.E. Ecohydrologic response and recovery of a semi-arid shrubland over a five year period following burning. 2016. Catena, 144, 163-176. https://doi.org/10.1016/j.catena.2016.05.006

Clark, P.E., Williams, C.J., Pierson, F.B., and Hardegree, S.P. Postfire grazing management effects on mesic sagebrush-steppe vegetation: Spring grazing. 2016. Journal of Arid Environments, 132, 49-59. https://doi.org/10.1016/j.jaridenv.2015.10.022

Pierson, F.B., and Williams, C.J. Ecohydrologic impacts of rangeland fire on runoff and erosion: A literature synthesis. USDA Forest Service - General Technical Report - RMRS-GTR-351. 2016. 110 p. https://doi.org/10.2737/RMRS-GTR-351

Nouwakpo, S.K., Williams, C.J., Al-Hamdan, O.Z., Weltz, M.A., Pierson, F., and Nearing, M. A review of concentrated flow erosion processes on rangelands: Fundamental understanding and knowledge gaps. 2016. International Soil and Water Conservation Research, 4 (2), 75-86. https://doi.org/10.1016/j.iswcr.2016.05.003

Williams, C.J., Pierson, F.B., Robichaud, P.R., Al-Hamdan, O.Z., Boll, J., and Strand, E.K. Structural and functional connectivity as a driver of hillslope erosion following disturbance. 2016. International Journal of Wildland Fire, 25 (3), 306-321. https://doi.org/10.1071/WF14114

Williams, C.J., Pierson, F.B., Spaeth, K.E., Brown, J.R., Al-Hamdan, O.Z., Weltz, M.A., Nearing, M.A., Herrick, J.E., Boll, J., Robichaud, P.R., Goodrich, D.C., Heilman, P., Phillip Guertin, D., Hernandez, M., Wei, H., Hardegree, S.P., Strand, E.K., Bates, J.D., Metz, L.J., and Nichols, M.H. Incorporating hydrologic data and ecohydrologic relationships into Ecological Site Descriptions. 2016. Rangeland Ecology and Management, 69 (1), 4-19. https://doi.org/10.1016/j.rama.2015.10.001

Pierson, F.B., Williams, C.J., Kormos, P.R., Al-Hamdan, O.Z., Hardegree, S.P., and Clark, P.E. Short-term impacts of tree removal on runoff and erosion from pinyon- and juniper-dominated sagebrush hillslopes. 2015. Rangeland Ecology and Management, 68 (5), 408-422. https://doi.org/10.1016/j.rama.2015.07.004

Al-Hamdan, O.Z., Hernandez, M., Pierson, F.B., Nearing, M.A., Williams, C.J., Stone, J.J., Boll, J., and Weltz, M.A. Rangeland Hydrology and Erosion Model (RHEM) enhancements for applications on disturbed rangelands. 2015. Hydrological Processes, 29 (3), 445-457. https://doi.org/10.1002/hyp.10167

McIver, J., Brunson, M., Bunting, S., Chambers, J., Doescher, P., Grace, J., Hulet, A., Johnson, D., Knick, S., Miller, R., Pellant, M., Pierson, F., Pyke, D., Rau, B., Rollins, K., Roundy, B., Schupp, E., Tausch, R., and Williams, J. A synopsis of short-term response to alternative restoration treatments in sagebrush-steppe: The SageSTEP Project. 2014. Rangeland Ecology and Management, 67 (5), 584-598. https://doi.org/10.2111/REM-D-14-00084.1

Pierson, F.B., Williams, C.J., Kormos, P.R., and Al-Hamdan, O.Z. Short-term effects of tree removal on infiltration, runoff, and erosion in woodland-encroached sagebrush steppe. 2014. Rangeland Ecology and Management, 67 (5), 522-538. https://doi.org/10.2111/REM-D-13-00033.1

Kormos, P.R., Marks, D., Williams, C.J., Marshall, H.P., Aishlin, P., Chandler, D.G., and McNamara, J.P. Soil, snow, weather, and sub-surface storage data from a mountain catchment in the rain-snow transition zone. 2014. Earth System Science Data, 6 (1), 165-173. https://doi.org/10.5194/essd-6-165-2014

Williams, C.J., Pierson, F.B., Al-Hamdan, O.Z., Kormos, P.R., Hardegree, S.P., and Clark, P.E. Can wildfire serve as an ecohydrologic threshold-reversal mechanism on juniper-encroached shrublands? 2014. Ecohydrology, 7 (2), 453-477. https://doi.org/10.1002/eco.1364

Williams, C.J., Pierson, F.B., Robichaud, P.R., and Boll, J. Hydrologic and erosion responses to wildfire along the rangeland-xeric forest continuum in the western US: A review and model of hydrologic vulnerability. 2014. International Journal of Wildland Fire, 23 (2), 155-172. https://doi.org/10.1071/WF12161

Miller, R.F., Chambers, J.C., Pyke, D.A., Pierson, F.B., and Williams, C.J. A review of fire effects on vegetation and soils in the great basin region: Response and ecological site characteristics. USDA Forest Service - General Technical Report - RMRS-GTR-308. 2013. 126 p. https://doi.org/10.2737/RMRS-GTR-308

Al-Hamdan, O.Z., Pierson, F.B., Nearing, M.A., Williams, C.J., Stone, J.J., Kormos, P.R., Boll, J., and Weltz, M.A. Risk assessment of erosion from concentrated flow on rangelands using overland flow distribution and shear stress partitioning. 2013. Transactions of the ASABE, 56 (2), 539-548. https://doi.org/10.13031/2013.42684

Pierson, F.B., Williams, C.J., Hardegree, S.P., Clark, P.E., Kormos, P.R., and Al-Hamdan, O.Z. Hydrologic and erosion responses of sagebrush steppe following juniper encroachment, wildfire, and tree cutting. 2013. Rangeland Ecology and Management, 66 (3), 274-289. https://doi.org/10.2111/REM-D-12-00104.1

Al-Hamdan, O.Z., Pierson, F.B., Nearing, M.A., Williams, C.J., Stone, J.J., Kormos, P.R., Boll, J., and Weltz, M.A. Concentrated flow erodibility for physically based erosion models: Temporal variability in disturbed and undisturbed rangelands. 2012. Water Resources Research, 48 (7), W07504. https://doi.org/10.1029/2011WR011464

Madsen, M.D., Davies, K.W., Williams, C.J., and Svejcar, T.J. Agglomerating seeds to enhance native seedling emergence and growth. 2012. Journal of Applied Ecology, 49 (2), 431-438. https://doi.org/10.1111/j.1365-2664.2012.02118.x

Wilcox, B.P., Turnbull, L., Young, M.H., Williams, C.J., Ravi, S., Seyfried, M.S., Bowling, D.R., Scott, R.L., Germino, M.J., Caldwell, T.G., and Wainwright, J. Invasion of shrublands by exotic grasses: Ecohydrological consequences in cold versus warm deserts. 2012. Ecohydrology, 5 (2), 160-173. https://doi.org/10.1002/eco.247

Al-Hamdan, O.Z., Pierson, F.B., Nearing, M.A., Stone, J.J., Williams, C.J., Moffet, C.A., Kormos, P.R., Boll, J., and Weltz, M.A. Characteristics of concentrated flow hydraulics for rangeland ecosystems: Implications for hydrologic modeling. 2012. Earth Surface Processes and Landforms, 37 (2), 157-168. https://doi.org/10.1002/esp.2227

Eitel, J.U.H., Williams, C.J., Vierling, L.A., Al-Hamdan, O.Z., and Pierson, F.B. Suitability of terrestrial laser scanning for studying surface roughness effects on concentrated flow erosion processes in rangelands. 2011. Catena, 87 (3), 398-407. https://doi.org/10.1016/j.catena.2011.07.009

Pierson, F.B., Williams, C.J., Hardegree, S.P., Weltz, M.A., Stone, J.J., and Clark, P.E. Fire, plant invasions, and erosion events on western rangelands. 2011. Rangeland Ecology and Management, 64 (5), 439-449. https://doi.org/10.2111/REM-D-09-00147.1

Pierson, F.B., Williams, C.J., Kormos, P.R., Hardegree, S.P., Clark, P.E., and Rau, B.M. Hydrologic vulnerability of sagebrush steppe following pinyon and juniper encroachment. 2010. Rangeland Ecology and Management, 63 (6), 614-629. https://doi.org/10.2111/REM-D-09-00148.1

Cline, N.L., Roundy, B.A., Pierson, F.B., Kormos, P., and Williams, C.J. Hydrologic response to mechanical shredding in a juniper woodland. 2010. Rangeland Ecology and Management, 63 (4), 467-477. https://doi.org/10.2111/REM-D-09-00196.1

Pierson, F.B., Moffet, C.A., Williams, C.J., Hardegree, S.P., and Clark, P.E. Prescribed-fire effects on rill and interrill runoff and erosion in a mountainous sagebrush landscape. 2009. Earth Surface Processes and Landforms, 34 (2), 193-203. https://doi.org/10.1002/esp.1703

Williams, C.J., McNamara, J.P., and Chandler, D.G. Controls on the temporal and spatial variability of soil moisture in a mountainous landscape: The signature of snow and complex terrain. 2009. Hydrology and Earth System Sciences, 13 (7), 1325-1336. https://doi.org/10.5194/hess-13-1325-2009

Pierson, F.B., Robichaud, P.R., Moffet, C.A., Spaeth, K.E., Hardegree, S.P., Clark, P.E., and Williams, C.J. Fire effects on rangeland hydrology and erosion in a steep sagebrush-dominated landscape. 2008. Hydrological Processes, 22 (16), 2916-2929. https://doi.org/10.1002/hyp.6904

Pierson, F.B., Robichaud, P.R., Moffet, C.A., Spaeth, K.E., Williams, C.J., Hardegree, S.P., and Clark, P.E. Soil water repellency and infiltration in coarse-textured soils of burned and unburned sagebrush ecosystems. 2008. Catena, 74 (2), 98-108. https://doi.org/10.1016/j.catena.2008.03.011

Williams, C.J., McNamara, J.P., and Whittier, R.B. Surface-water and ground-water interaction in the Pahsimeroi Valley, Idaho, USA. Technical Report – BSU-CGISS-06-02. 2006. 73 p.