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United States Department of Agriculture

Agricultural Research Service

Mary Hennessey Nichols
Research Hydraulic Engineer


Publications (Clicking on the reprint icon Reprint Icon will take you to the publication reprint.)
Determining soil erosion rates on semi-arid watersheds using radioisotope-derived sedimentation chronology 2327 -
The influence of Holocene vegetation changes on topography and erosion rates: a case study at Walnut Gulch Experimental Watershed -
Pelletier, J., Nichols, M.H., Nearing, M.A. 2016. The influence of Holocene vegetation changes on topography and erosion rates: a case study at Walnut Gulch Experimental Watershed. Earth Surface Dynamics. 4:417-488. doi: 10.5194/esurf-4-471-2016.
Monitoring channel head erosion processes in response to an artificially induced abrupt base level change using time-lapse photography 2301 -
Nichols, M.H., Nearing, M.A., Hernandez, M., Polyakov, V. 2016. Monitoring channel head erosion processes in response to an artificially induced abrupt base level change using time-lapse photography. Geomorphology. 265:107-116.
Semiarid watershed response to low-tech porous rock check dams -
Nichols, M.H., Polyakov, V.O., Nearing, M.A., Hernandez, M. 2016. Semiarid watershed response to low-tech porous rock check dams. Soil Science. 181(7):275-282. doi: 10.1097/SS.0000000000000160.
Quantifying decadal-scale erosion rates and their short-term variability on ecological sites in a semi-arid environment -
Polyakov, V., Nearing, M.A., Stone, J., Holifield Collins, C.D., Nichols, M.H. 2015. Quantifying decadal-scale erosion rates and their short-term variability on ecological sites in a semi-arid environment. Catena. 137:501-507. doi:10.1016/j.catena.2015.10.023.
Incorporating hydrologic data and ecohydrologic relationships in ecological site descriptions -
Williams, C.J., Pierson Jr, 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, P.D., Hernandez, M., Wei, H., Hardegree, S.P., Strand, E.K., Bates, J.D., Metz, L., Nichols, M.H. 2016. Incorporating hydrologic data and ecohydrologic relationships in ecological site descriptions. Rangeland Ecology and Management. 69:4-19.
Temporal and elevation trends in rainfall erosivity on a 149 km2 watershed in a semi-arid region of the American Southwest -
Nearing, M.A., Unkrich, C.L., Goodrich, D.C., Nichols, M.H., Keefer, T.O. 2015. Temporal and elevation trends in rainfall erosivity on a 149 km2 watershed in a semi-arid region of the American Southwest. International Soil and Water Conservation Conference. 3:77-85.
Can conservation trump impacts of climate change on soil erosion? An assessment from winter wheat cropland in the Southern Great Plains of the United States -
Garbrecht, J.D., Nearing, M.A., Steiner, J.L., Zhang, X.J., Nichols, M.H. 2015. Can conservation trump impacts of climate change on soil erosion? An assessment from winter wheat cropland in the Southern Great Plains of the United States. Weather and Climate Extremes. 10(A):32-39. doi:10.1016/j.wace.2015.06.002.
Sediment-generated noise (SGN): Comparison with physical bedload measurements in a small semi-arid watershed -
Rigby Jr, J.R., Wren, D.G., Kuhnle, R.A., Nichols, M.H., Goodwiller, B.T., Carpenter, W.O., Chambers, J.P. 2015. Sediment-generated noise (SGN): Comparison with physical bedload measurements in a small semi-arid watershed. In: Proceedings of the Federal Interagency Sedimentation Conference. April 19-23, Reno, Nevada. pp. 400-407.
Uncertainty in measuring runoff from small watersheds using instrumented outlet-pond -
Nichols, M.H., Anson, E.L., Keefer, T.O. 2014. Uncertainty in measuring runoff from small watersheds using instrumented outlet-pond. Transactions of the ASABE. 57(3):851-859.
Effect of check dams on runoff, sediment yield and retention on small semi-arid watersheds -
Polyakov, V.O., Nichols, M.H., Mcclaran, M., Nearing, M.A. 2014. Effect of check dams on runoff, sediment yield and retention on small semi-arid watersheds. Journal of Soil and Water Conservation. 69:414-421.
Very high resolution time-lapse photography for plant and ecosystems research -
Nichols, M.H., Steven, J., Sargent, R., Dille, P., Schapiro, J. 2013. Very high resolution time-lapse photography for plant and ecosystems research. Applications in Plant Sciences. 1(9):1300033.
A sediment budget for a small semiarid watershed in southeastern Arizona, USA -
Nichols, M.H., Nearing, M.A., Polyakov, V.O., Stone, J.J. 2012. A sediment budget for a small semiarid watershed in southeastern Arizona, USA. Geomorphology. 180-181: 137-145.
Short-term soil moisture response to low-tech erosion control structures in a semi arid rangeland -
Nichols, M.H., Mcreynolds, K., Reed, C. 2012. Short-term soil moisture response to low-tech erosion control structures in a semi arid rangeland. Catena. 98:104-109.
A comparison of two stream gauging systems for measuring runoff and sediment yield on semi-arid wtershed -
Polyakov, V.O., Nearing, M.A., Hawdin, A., Wilkinson, S., Nichols, M.H. 2013. A comparison of two stream gauging systems for measuring runoff and sediment yield on semi-arid wtershed . Earth Surface Processes and Landforms. 38: 383–390.
Utilizing long-term ARS data to compare and contrast hydroclimatic trends from snow and rainfall dominated watersheds -
Goodrich, D.C., Marks, D.G., Seyfried, M.S., Keefer, T.O., Unkrich, C.L., Anson, E.L., Clark, P., Flerchinger, G.N., Hamerlynck, E.P., Hardegree, S.P., Heilman, P., Holifield Collins, C.D., Moran, M.S., Nearing, M.A., Nichols, M.H., Pierson Jr, F.B., Scott, R.L., Stone, J.J., Van Vactor, S.S., Winstral, A.H., Wong, J.K. 2011. Utilizing long-term ARS data to compare and contrast hydroclimatic trends from snow and rainfall dominated watersheds. Proceedings of the 4th Interagency Conference of Research in the Watersheds, Fairbanks, AK., Sept. 26-30, 2011.
Headcut retreat in a semiarid watershed in the southwestern United States since 1935 -
Reike-Zapp, D., Nichols, M.H. 2011. Headcut retreat in a semiarid watershed in the southwestern United States since 1935. Catena. 87(1):1-10.
Runoff and erosional response to a drought-induced shift in a desert grassland community composition -
Polyakov, V.O., Nearing, M.A., Stone, J.J., Hamerlynck, E.P., Nichols, M.H., Holifield Collins, C.D., Scott, R.L. 2010. Runoff and erosional response to a drought-induced shift in a desert grassland community composition. Journal of Geophysical Research-Biogeosciences. 115: 1-8. G04027.
Patterns of grain-size dependent sediment tranpsort in low-ordered, ephemeral-channels -
Yuill, B., Nichols, M.H. 2010. Patterns of grain-size dependent sediment tranpsort in low-ordered, ephemeral-channels. Earth Surface Processes and Landforms. p. 1-13.
Long-term runoff and sediment yields from small semi-arid watersheds in southern Arizona Reprint Icon -
Polyakov, V., Nearing, M.A., Nichols, M.H., Scott, R.L., Stone, J.J., Mcclaran, M. 2010. Long-term runoff and sediment yields from small semi-arid watersheds in southern Arizona. Water Resources Research. 46: W09512, doi:10.1029/2009WR009001.
COARSE BED MATERIAL PATCH EVOLUTION IN LOW-ORDER, EPHEMERAL CHANNELS 2007 -
Very High Resolution Panoramic Photography to Improve Conventional Rangeland Monitoring 1994 -
Nichols, M.H., Ruyle, G.B., Nourbakhsh, I.R. 2009. Very High Resolution Panoramic Photography to Improve Conventional Rangeland Monitoring. 62:579–582.
Estimating an Impedance-to-Flow Parameter for Flood Peak Prediction in Semi-Arid Watersheds 1997 -
Tracing sediment movement on semi-arid watershed using Rare Earth Elements 1988 -
Polyakov, V., Kimoto, A., Nearing, M.A., Nichols, M.H. 2009. Tracing sediment movement on semi-arid watershed using Rare Earth Elements. Soil Science Society of America Journal. 73:1559-1565.
A new Splash and Sheet Erosion Equation for Rangelands 1957 -
Wei, H., Nearing, M.A., Stone, J.J., Guertin, D.P., Spaeth, K., Pierson Jr, F.B., Nichols, M.H., Moffet, C.A. 2009. A new Splash and Sheet Erosion Equation for Rangelands. Soil Science Society of America Journal. 73:1386-1392.
Long-term data collection at USDA experimental sites for studies of ecohydrology -
Moran, M.S., Peters, D.C., Mcclaren, M.P., Nichols, M.H., Adams, M.B. 2008. Long-term data collection at USDA experimental sites for studies of ecohydrology. Journal of Ecohydrology. 1:377–393. DOI: 10.1002/eco.24.
Event to multidecadal persistence in rainfall and runoff in southeast Arizona 1908 -
Goodrich, D.C., Unkrich, C.L., Keefer, T.O., Nichols, M.H., Stone, J.J., Levick, L., Scott, R.L. 2008. Event to multidecadal persistence in rainfall and runoff in southeast Arizona. Water Resour. Res., 44, W05S14, doi:10.1029/2007WR006222.
Long-term data collection at USDA experimental sites for studies of ecohydrology 1955 -
Moran, M.S., Peters, D.C., Mcclaran, M., Nichols, M.H., Adams, M. 2008. Long-term data collection at USDA experimental sites for studies of ecohydrology (abstract). 28th Conference on Agriculture and Forest Meteorology, 28 April - 2 May, Orlando, FL. 1955 . Agriculture and Forest Meterology.
Geographic information systems database, Walnut Gulch Experimental Watershed, Arizona, United States 1868 -
Heilman, P., Nichols, M.H., Goodrich, D.C., Miller, S.N., Guertin, D.P. 2008. Geographic information systems database, Walnut Gulch Experimental Watershed, Arizona, United States. Water Resources Research, Vol. 44, W05S11, doi:10.1029/2006WR005777.
Long-term precipitation database, Walnut Gulch Experimental Watershed, Arizona, United States 1864 -
Goodrich, D.C., Keefer, T.O., Unkrich, C.L., Nichols, M.H., Osborn, H.B., Stone, J.J., Smith, J.R. 2008. Long-term precipitation database, Walnut Gulch Experimental Watershed, Arizona, United States. Water Resources Research, Vol. 44, W05S04, doi:10.1029/2006WR005782.
Long-term runoff database, Walnut Gulch Experimental Watershed, Arizona, United States 1888 -
Stone, J.J., Nichols, M.H., Goodrich, D.C., Buono, J. 2008. Long-term runoff database, Walnut Gulch Experimental Watershed, Arizona, United States. Water Resources Research, Vol. 44, W05S05, doi:10.1029/2006WR005733.
A brief background on the U.S. Department of Agriculture Agricultural Research Service Walnut Gulch Experimental Watershed 1857 -
Renard, K.G., Nichols, M.H., Woolhiser, D.A., Osborn, H.B. 2008. A brief background on the U.S. Department of Agriculture Agricultural Research Service Walnut Gulch Experimental Watershed. Water Resources Research. Vol. 44, W05S02, doi:10.1029/2006WR005691.
Sediment database, Walnut Gulch Experimental Watershed, Arizona, United States 1853 -
Nichols, M.H., Stone, J.J., Nearing, M.A. 2008. Sediment database, Walnut Gulch Experimental Watershed, Arizona, United States. Water Resources Research. Vol. 44, W05S06, doi:10.1029/2006WR005682.
Southwest Watershed Research Center Data Access Project 1851 -
Nichols, M.H., Anson, E. 2008. Southwest Watershed Research Center Data Access Project. Water Resources Research. Vol. 44, W05S03, doi:10.1029/2006WR005665.
Preface to special section on Fifty Years of Research and Data Collection: U.S. Department of Agriculture Walnut Gulch Experimental Watershed 1930 -
Moran, M.S., Emmerich, W.E., Goodrich, D.C., Heilman, P., Holifield Collins, C.D., Keefer, T.O., Nearing, M.A., Nichols, M.H., Renard, K.G., Scott, R.L., Smith, J.R., Stone, J.J., Unkrich, C.L., Wong, J.K. 2008. Preface to special section on Fifty Years of Research and Data Collection: U.S. Department of Agriculture Walnut Gulch Experimental Watershed. Water Resources Research, Vol. 44, W05S01, doi:10.1029/2007WR006083.
Sediment yields from unit-source semi-arid watersheds at Walnut Gulch 1893 -
Nearing, M.A., Nichols, M.H., Stone, J.J., Renard, K.G., Simanton, J.R. 2008. Sediment yields from unit-source semi-arid watersheds at Walnut Gulch. Water Resources Research. Vol. 43, W06426, doi:10.1029/2006WR005692.
THE WALNUT GULCH EXPERIMENTAL WATERSHED - 50 YEARS OF WATERSHED MONITORING AND RESEARCH 1664 -
Nichols, M.H. 2007. The walnut gulch experimental watershed - 50 years of watershed monitoring and research. In: Monitoring and Evaluation of Soil Conservation and Watershed Development Projects. de Graaff, J, Cameron, J., Sombatpanit, S., Pieri, C., Woodhill, J.(eds.). World Association of Soil and Water Conservation, Bangkok. 496 p.
DWEPP: A DYNAMIC SOIL EROSION MODEL BASED ON WEPP SOURCE TERMS 1819 -
Bulygina, N.S., Nearing, M.A., Stone, J.J., Nichols, M.H. 2007. Dwepp: a dynamic soil erosion model based on wepp source terms. Earth Surface Processes and Landforms. 32:998-1012.
Spatial patterns of scour and fill in dryland sand bed streams 1843 -
Powell, D.M., Brazier, R., Wainwright, J., Parsons, A., Nichols, M.H. 2006. Spatial patterns of scour and fill in dryland sand bed streams. Water Resources Research Vol. 42, W08412,doi:10.1029/2005WR004516.
MONITORING COARSE SEDIMENT PARTICLE DISPLACEMENT USING A RADIO FREQUENCY IDENTIFICATION SYSTEM 1773 -
Nichols, M.H. 2006. Monitoring coarse sediment particle displacement using a radio frequency identification system. Proc. 8th Federal Interagency Sedimentation Conference, April 2-6, 2006, Reno NV.
SPATIAL PATTERNS OF SOIL EROSION AND DEPOSITION IN TWO SMALL, SEMI-ARID WATERSHEDS 1771 -
Nearing, M.A., Kimota, A., Nichols, M.H., Ritchie, J.C. 2006. Spatial patterns of soil erosion and deposition in two small, semi-arid watersheds. Proc. 8th Federal Interagency Sedimentation Conference, April 2-6, 2006, Reno, Nevada.
MEASURED SEDIMENT YIELD RATES FROM SEMIARID RANGELAND WATERSHEDS 1751 -
Nichols, M.H. 2006. Measured sediment yield rates from semiarid rangeland watersheds. Rangeland Ecol. and Manage. 59(1):55-62.
SPATIAL PATTERNS OF EROSION IN TWO SEMIARID WATERSHEDS 1770 -
Nearing, M.A., Kimoto, A., Nichols, M.H., Ritchie, J.C. 2005. Spatial patterns of erosion in two semiarid watersheds. 2nd Annual Conference on Research Insights in Semiarid Ecosystems. (Abstract). University of Arizona, Tucson, AZ., October 2005. p. 8.
SPATIAL PATTERNS OF EROSION IN TWO SEMIARID WATERSHEDS 1772 -
SPATIAL PATTERNS OF SOIL EROSION AND DEPOSITION IN TWO SMALL, SEMIARID WATERSHEDS 1725 -
Nearing, M.A., Kimoto, A., Nichols, M.H., Ritchie, J.C. 2005. Spatial patterns of soil erosion and deposition in two small, semiarid watersheds J. Geophys. Res., 110, F04020, doi:10.1029/2005JF000290.
TRENDS IN PRECIPITATION RUNOFF AND IN CHANNEL VEGETATION IN THE USDA-ARS WALNUT GULCH EXPERIMENTAL WATERSHED 1735 -
Nichols, M.H., Nearing, M.A., Shipek, D.C. 2005. Trends in precipitation runoff and in channel vegetation in the usda-ars walnut gulch experimental watershed. Proc. ASCE, World Water and Environmental Resource Congress, May 15-19, Anchorage, AK.
MODELING RESPONSE OF SOIL EROSION AND RUNOFF TO CHANGES IN PRECIPITATION AND COVER 1722 -
Nearing, M.A., Jetten, V., Baffaut, C., Cerdan, O., Couturier, A., Hernandez, M., Le Bissonnais, Y., Nichols, M.H., Nunes, J.P., Renschler, C.S., Souchere, V., Van Oost, K. 2005. Modeling response of soil erosion and runoff to changes in precipitation and cover. Proc. World Water and Environ. Resources Congress 2005, May 15-19, Ankorage, Alaska.
PATTERNS OF SOIL EROSION AND REDEPOSITION ON LUCKY HILLS WATERSHED, WALNUT GULCH EXPERIMENTAL WATERSHED, ARIZONA -
Ritchie, J.C., Nearing, M., Nichols, M., Ritchie, C.A. 2005. Patterns of soil movement on Lucky Hills Watershed, Walnut Gulch Arizona. Catena 61(2-3):122-130.
EROSION PREDICTION 1629 -
Nearing, M.A., Renard, K.G., Nichols, M.H., Stone, J.J. 2005. Erosion prediction. In: Stan Trimble (editor). Encyclopedia of Water Science. p. 145-152.
EROSION PREDICTION AND MODELING 1590 -
Nearing, M.A., Renard, K.G., Nichols, M.H. 2005. Erosion prediction and modeling. In: M.G. Anderson, J.J. McDowell (Editors). Encyclopedia of Hydrological Sciences. Vol. 2. New York. John Wiley and Sons. p. 1221-1228.
MODELING RESPONSE OF SOIL EROSION AND RUNOFF TO CHANGES IN PRECIPITATION AND COVER 1647 -
Nearing, M.A., Jetten, V., Baffaut, C., Cerdan, O., Couturier, A., Hernandez, M., Le Bissonnais, Y., Nichols, M.H., Nunes, J.P., Renschler, C.S., Souchere, V., Van Oost, K. 2005. Modeling response of soil erosion and runoff to changes in precipitation and cover. Catena. 61(2-3):131-154.
TRANSPORTED SEDIMENT IN COMPARISON WITH CHANNEL BED MATERIAL IN LOW-ORDER ALLUVIAL CHANNELS 1666 -
Nichols, M.H., Canfield, H.E., Yuill, B.T., Schmeeckle, M. 2004. Transported sediment in comparison with channel bed material in low-order alluvial channels. [Abstract]. EOS Trans. AGU, 85(47), Fall Meet. Suppl., Abstract 4513.
COUPLING SEDIMENT TRANSPORT WITH THE DRYLAND ENVIRONMENT 1665 -
Yuill, B.T., Nichols, M.H., Shipek, D.C., Schmeeckle, M. 2004. Coupling sediment transport with the dryland environment. [Abstract]. EOS Trans. AGU, 85(47), Fall Meet. Suppl., Abstract 4653.
EROSION MECHANICAL CONTROL 1662 -
Nichols, M.H., Renard, K.G., Nearing, M.A., Stone, J.J. 2005. Erosion mechanical control. Online Encyclopedia of Water Science. 1(1). Available: http://www2.dekker.com/sdek/abstract~db=enc~content=a713595839.
INSTRUMENTATION AND RESEARCH AT THE USDA-ARS WALNUT GULCH EXPERIMENTAL WATERSHED 1611 -
Nichols, M.H., Stone, J.J., Keefer, T.O., Smith, J.R., Moran, M.S., Renard, K.G. 2004. Instrumentation and research at the usda-ars walnut gulch experimental watershed. Proceedings Internat'l. Instrumented Watershed Sym., June 22-25, 2004, Edmonton, Canada, 14 p.
A RADIO FREQUENCY IDENTIFICATION SYSTEM FOR MONITORING COARSE SEDIMENT PARTICLE DISPLACEMENT 1587 -
Nichols, M.H. 2004. A radio frequency identification system for monitoring coarse sediment particle displacement. Applied Engineering in Agriculture Vol.20(6): 783-787.
ASSESSING SOIL ORGANIC CARBON REDISTRIBUTION WITH FALLOUT CESIUM-137 -
Ritchie, J.C., McCarty, G.W., Venteris, E.R., Kaspar, T.C., Owens, L.B., Nearing, M. 2004. Assessing soil organic carbon redistribution with fallout 137Cesium. In: Proceedings of Conserving Soil and Waterfor Society: Sharing Solutions, ISCO 2004-13th International Soil Conservation Organization Conference, July 4-9, 2004, Brisbane, Australia. 613:4. 2004 CDROM.
CD-HILLSLOPE EROSION MODEL 1605 -
Nichols, M.H. 2004. Hillslope erosion model. Southwest Watershed Research Center Web Site. Available: http://www.tucson.ars.ag.gov
CD-SOUTHWEST WATERSHED RESEARCH CENTER ONLINE DATA ACCESS 1606 -
Nichols, M.H., Anson, E., Stone, J.J., Unkrich, C.L., Keefer, T.O., Wong, J.K. 2004. Southwest Watershed Research Center online data access. Southwest Watershed Research Center Web Site. Available: http://www.tucson.ars.ag.gov
HISTORY OF SMALL WATERSHEDS RESEARCH IN NON-FORESTED WATERSHEDS IN ARIZONA AND NEW MEXICO 1558 -
Proc, 1st Interagency Conf. on Research in the Watersheds, Oct. 27-30, 2003, Benson, AZ., pp.296-301.
SEDIMENT YIELD FROM SEMIARID WATERSHEDS 1555 -
Nichols, M.H., Renard, K.G. 2003. Sediment yield from semiarid watersheds. Proceedings First Interagency Conference on Research in the Watersheds. Oct. 27-30, 2003, Benson, AZ., pp. 161-166.
STREAM-BED SCOUR AND FILL IN LOW-ORDER EPHEMERAL STREAM CHANNELS 1557 -
Powell, D.M., Bazier, R., Nichols, M.H., Wainwright, J., Parsons, A. 2003. Stream-bed scour and fill in low-order ephemeral stream channels. Proceedings First Interagency Conference on Research in the Watersheds. Oct. 27-30, 2003, Benson, AZ. pp.180-184.
AMERICA'S WATERSHEDS: TECHNICAL BASIS FOR NEW STRATEGIES 1297 -
AN INTEGRATED SYSTEMS APPROACH TO MODELING SEDIMENT YIELD FROM RANGELAND WATERSHEDS 1305 -
THE SPATIAL DISTRIBUTION OF SEDIMENT SOURCES AND SINKS AT THE WATERSHED SCALE IN SEMIARID AREAS (DISSERTATION) 1289 -
INFORMATION SYSTEMS TECHNOLOGY FOR ASSESSMENT OF RANGELAND ECOSYSTEMS 1248 -
MODELING SMALL SEMIARID WATERSHEDS IN SUPPORT OF EXPERT SYSTEM DEVELOPMENT 1268 -
INTEGRATED INFORMATION SYSTEMS FOR KNOWLEDGE-BASED RESEARCH, TECHNOLOGY DEVELOPMENT, AND TRANSFER. 1265 -
SNOW COVER MAPPING USING AVHRR IMAGES AND GIS FOR SNOWMELT RUNOFF PREDICTION 1261 -
A HYDROLOGIC METHOD FOR SEDIMENT TRANSPORT AND YIELD -
Last Modified: 8/26/2016
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