R Skaggs

WNR Distinguished Univ. Prof.

  • 919-515-6739
  • Weaver Administration Bldg 111

Dr. Richard Wayne Skaggs, William Neal Reynolds and Distinguished University Professor was on the faculty of the NC State University Department of Biological and Agricultural Engineering for 42.5 years. hr retired in 2012. He has made extraordinary contributions to the advancement of Agricultural and Biological Engineering as a teacher, mentor, researcher, and national leader.  He is recognized globally as the expert in drainage and subsurface water management.

Skaggs was born and reared on a farm in eastern Kentucky. He attended the University of Kentucky where he received the BS and MS degrees in Agricultural Engineering in 1964 and 1966. He joined NC State University in 1970 after earning the PhD from Purdue University.  Wayne advanced quickly through the ranks to Professor before being named William Neal Reynolds Professor in 1984.  He was also elected to the National Academy of Engineering in 1991 and named Distinguished University Professor that same year. N.C. State presented Skaggs its highest faculty recognition in 1994, the Alexander Quarles Holladay Award; and in 1997, he received the University of North Carolina’s highest award, the O. Max Gardner Award. He received the Alexander von Humboldt award for contributions to U.S. agriculture in 1997, one of only two engineers to ever receive that award.

During his professional career, Skaggs made pioneering contributions to the understanding and utilization of complex soil, water, and plant systems. His work includes the 1978 development of the water management model, DRAINMOD, which effectively combines fundamental methods derived over several decades by soil physicists and engineers to create a tool that quantitatively relates drainage design parameters to the actual objective of the water management system.  This model has effectively bridged the gap that existed between theory and practice and is now used globally by consulting engineers, researchers and government agencies to predict the performance of drainage and related water management systems. The model has been extended by Skaggs, his students, and colleagues to predict the movement and fate of nitrates, salts and other solutes in the soil profile; to evaluate and assess the hydrology of wetlands; and most recently to predict soil carbon, nitrogen dynamics, and plant growth in drained forests and agricultural ecosystems.

Dr. Skaggs has made contributions to international development of agricultural water management and hydrology.  He has held short-term research, teaching and consulting positions in 10 countries (e.g., Egypt, India, Israel, Italy, Malaysia, Turkey), and presented invited lectures and keynote addresses in many others.  The research project he initiated in Uruguay on hydrologic impacts of afforestation is ongoing and was recently expanded to include bio-energy crops.

A dedicated professor who has exemplified the highest spirit of teaching and mentorship, Skaggs has served as major professor for 24 masters and 40 doctoral students who have gone on to highly successful and productive careers.  He has served as technical consultant on drainage and water management issues for numerous state and federal agencies and foreign governments. He has authored or coauthored more than 420 refereed journal articles, book chapters, conference proceedings, extension publications, and technical reports, as well as 2 books. He co-edited (with Jan van Schilfgaarde) the American Society of Agronomy 1328 page, 42 chapter monograph, Agricultural Drainage, which serves internationally as a principal reference for drainage theory and practice.  Among Wayne’s many significant publications are those that have won 7 ASAE Paper awards, with the most recent being named in May of this year, and 3 ASAE Honorable Mention Paper awards.   He has been invited to share his expertise and research findings at hundreds of invited lectures and keynote addresses.

In addition to those already named, Skaggs has received numerous national and international recognitions of his meritorious contributions to the advancement of soil and water engineering. These include the ASAE Young Researcher and Hancor Soil and Water Engineering Awards; 3 USDA Superior Service awards; membership in The Ohio State University’s Overholt Drainage Hall of Fame, University of Kentucky Engineering Hall of Distinction, and Purdue University Distinguished Engineering Alumnus. He was presented the Gamma Sigma Delta International Distinguished Achievement in Agriculture award (1999), and the Council for Agricultural Science and Technology (CAST) Charles A Black award in 2009. Wayne is a Fellow of ASABE, and has received two ASABE Gold Medal Awards, the John Deere Gold Medal (1993), and the Massey Ferguson Educational Gold Medal (2009). Skaggs served as President of the ASAE (currently ASABE) for 2001/2002.

Education

Ph.D. 1970

Agricultural Engineering

Purdue University

M.S. 1966

Agricultural Engineering

University of Kentucky

B.S. 1964

Agricultural Engineering

University of Kentucky

Research Description

Soil and Water Enginering

Honors and Awards

  • Member of National Academy of Engineering, 1991
  • President of American Society of Agricultural and Biological Engineers (ASABE), 2001
  • Massey Ferguson Gold Medal Award, Am. Soc. of Agricultural and Biological Engineers, 2009
  • Charles A. Black Award, Council Agricultural Science and Tech. (CAST), 2009
  • O. Max Gardner Award, University of North Carolina System, 1997
  • Alexander Quarles Holladay Medal for Excellence, N. C. State University, 1994
  • Distinguished Engineering Alumnus, Purdue University, 1997
  • Alexander von Humboldt Foundation Award, 1997
  • Member, Engineering Hall of Distinction, University of Kentucky, 1994
  • John Deere Gold Medal Award, ASAE,, 1993
  • Distinguished University Professor, 1991
  • Fellow, American Society of Agricultural Engineers, 1990
  • Hancor Soil and Water Engineering Award, ASAE, 1998
  • ,

Publications

Advances in drainage: Selected works from the tenth international drainage symposium
Strock, J. S. and Hay, C. H. and Helmers, M. J. and Nelson, K. A. and Sands, G. R. and Skaggs, R. W. and Douglas-Mankin, K. R. (2018), Transactions of the ASABE, 61(1), 161-168.
DRAINMOD-simulated performance of controlled drainage across the US Midwest
Youssef, M. A. and Abdelbaki, A. M. and Negm, L. M. and Skaggs, R. W. and Thorp, K. R. and Jaynes, D. B. (2018), Agricultural Water Management, 197(), 54-66.
Effect of drainage water management on nitrate nitrogen loss to tile drains in North Carolina
Poole, C. A. and Skaggs, R. W. and Youssef, M. A. and Chescheir, G. M. and Crozier, C. R. (2018), Transactions of the ASABE, 61(1), 233-244.
Calibration of paired watersheds: Utility of moving sums in presence of externalities
Ssegane, H. and Amatya, D. M. and Muwamba, A. and Chescheir, G. M. and Appelboom, T. and Tollner, E. W. and Nettles, J. E. and Youssef, M. A. and Birgand, F. and Skaggs, R. W. (2017), Hydrological Processes, 31(20), 3458-3471.
Coefficients for quantifying subsurface drainage rates
Skaggs, R. W. (2017), Applied Engineering in Agriculture, 33(6), 793-799.
Water quality effects of switchgrass intercropping on pine forest in Coastal North Carolina
Muwamba, A. and Amatya, D. M. and Chescheir, G. M. and Nettles, J. E. and Appelboom, T. and Ssegane, H. and Tollner, E. W. and Youssef, M. A. and Birgand, F. and Skaggs, R. W. and Tian, S. (2017), Transactions of the ASABE, 60(5), 1607-1620.
DRAINMOD-based tools for quantifying reductions in annual drainage flow and nitrate losses resulting from drainage water management on croplands in eastern North Carolina
Negm, L. M. and Youssef, M. A. and Chescheir, G. M. and Skaggs, R. W. (2016), Agricultural Water Management, 166(), 86-100.
Forest drainage
Skaggs, R. W. and Tian, S. and Chescheir, G. M. and Amatya, D. M. and Youssef, M. A. (2016), Forest Hydrology: Processes, Management and Assessment, (), 124-140.
Injury and recovery of maize roots affected by flooding
McDaniel, V. and Skaggs, R. W. and Negm, L. M. (2016), Applied Engineering in Agriculture, 32(5), 627-638.
Effects of site preparation for pine forest/switchgrass intercropping on water quality
Muwamba, A. and Amatya, D. M. and Ssegane, H. and Chescheir, G. M. and Appelboom, T. and Tollner, E. W. and Nettles, J. E. and Youssef, M. A. and Birgand, F. and Skaggs, R. W. and Tian, S. (2015), Journal of Environmental Quality, 44(4), 1263-1272.
Hydrological processes and model representation: Impact of soft data on calibration
Arnold, J. G. and Youssef, M. A. and Yen, H. and White, M. J. and Sheshukov, A. Y. and Sadeghi, A. M. and Moriasi, D. N. and Steiner, J. L. and Amatya, D. M. and Skaggs, R. W. and Haney, E. B. and Jeong, J. and Arabi, M. and Gowda, P. H. (2015), Transactions of the ASABE, 58(6), 1637-1660.
Impacts of switchgrass-loblolly pine intercropping on soil physical properties of a drained forest
Cacho, J. F. and Youssef, M. A. and Chescheir, G. M. and Skaggs, R. W. and Leggett, Z. H. and Sucre, E. B. and Nettles, J. E. and Arellano, C. (2015), Transactions of the ASABE, 58(6), 1573-1583.
Testing DRAINMOD-FOREST for predicting evapotranspiration in a mid-rotation pine plantation
Tian, S. Y. and Youssef, M. A. and Sun, G. and Chescheir, G. M. and Noormets, A. and Amatya, D. M. and Skaggs, R. W. and King, J. S. and McNulty, S. and Gavazzi, M. and Miao, G. F. and Domec, J. C. (2015), Forest Ecology and Management, 355(), 37-47.
DRAINMOD-DSSAT simulation of the hydrology, nitrogen dynamics, and plant growth of a drained corn field in Indiana
Negm, L. M. and Youssef, M. A. and Skaggs, R. W. and Chescheir, G. M. and Kladivko, E. J. (2014), Journal of Irrigation and Drainage Engineering, 140(8), .
Calibration and validation of DRAINMOD to model bioretention hydrology
Brown, R. A. and Skaggs, R. W. and Hunt, W. F. (2013), Journal of Hydrology, 486(), 430-442.
Effects of drainage water management on crop yields in North Carolina
Poole, C. A. and Skaggs, R. W. and Cheschier, G. M. and Youssef, M. A. and Crozier, C. R. (2013), Journal of Soil & Water Conservation, 68(6), 429-437.
Hydrologic effects of size and location of fields converted from drained pine forest to agricultural cropland
Kim, H. W. and Amatya, D. M. and Chescheir, G. M. and Skaggs, W. R. and Nettles, J. E. (2013), Journal of Hydrologic Engineering, 18(5), 552-566.
Predicting dissolved organic nitrogen export from a drained loblolly pine plantation
Tian, S. Y. and Youssef, M. A. and Skaggs, R. W. and Chescheir, G. M. and Amatya, D. M. (2013), Water Resources Research, 49(4), 1952-1967.
Review of nitrogen fate models applicable to forest landscapes in the southern US
Amatya, D. M. and Rossi, C. G. and Saleh, A. and Dai, Z. and Youssef, M. A. and Williams, R. G. and Bosch, D. D. and Chescheir, G. M. and Sun, G. and Skaggs, R. W. and Trettin, C. C. and Vance, E. D. and Nettles, J. E. and Tian, S. (2013), Transactions of the ASABE, 56(5), 1731-1757.
Drainage water management
Skaggs, R. W. and Fausey, N. R. and Evans, R. O. (2012), Journal of Soil & Water Conservation, 67(6), 167A-172.
Drainmod: model use, calibration, and validation
Skaggs, R. W. and Youssef, M. A. and Chescheir, G. M. (2012), Transactions of the ASABE, 55(4), 1509-1522.
Modeling water, carbon, and nitrogen dynamics for two drained pine plantations under intensive management practices
Tian, S. Y. and Youssef, M. A. and Skaggs, R. W. and Amatya, D. M. and Chescheir, G. M. (2012), Forest Ecology and Management, 264(), 20-36.
Temporal variations and controlling factors of nitrogen export from an artificially drained coastal forest
Tian, S. Y. and Youssef, M. A. and Skaggs, R. W. and Amatya, D. M. and Chescheir, G. M. (2012), Environmental Science & Technology, 46(18), 9956-9963.
A Drainmod-based method to estimate effects of drainage water management on annual nitrogen loss to surface water
Skaggs, R. W. and Youssef, M. A. and Chescheir, G. M. (2012), Transactions of the ASABE, 55(3), 799-808.
Advances in forest hydrology: Challenges and opportunities
Amatya, D. M. and Douglas-Mankin, K. R. and Williams, T. M. and Skaggs, R. W. and Nettles, J. E. (2011), Transactions of the ASABE, 54(6), 2049-2056.
Effect of minor drainage on hydrology of forested wetlands
Skaggs, R. W. and Phillips, B. D. and Chescheir, G. M. and Trettin, C. C. (2011), Transactions of the ASABE, 54(6), 2139-2149.
Effects of land use on soil properties and hydrology of drained coastal plain watersheds
Skaggs, R. W. and Chescheir, G. M. and Fernandez, G. P. and Amatya, D. M. and Diggs, J. (2011), Transactions of the ASABE, 54(4), 1357-1365.
Estimating nitrogen, phosphorus, and carbon fluxes in forested and mixed-use watersheds of the lower coastal plain of north carolina: uncertainties associated with infrequent sampling
Birgand, F. and Appelboom, T. W. and Chescheir, G. M. and Skaggs, R. W. (2011), Transactions of the ASABE, 54(6), 2099-2110.
Leaf area index (lai) of loblolly pine and emergent vegetation following a harvest
Sampson, D. A. and Amatya, D. M. and Lawson, C. D. B. and Skaggs, R. W. (2011), Transactions of the ASABE, 54(6), 2057-2066.
Linking plant ecology and long-term hydrology to improve wetland restoration success
Caldwell, P. V. and Vepraskas, M. J. and Gregory, J. D. and Skaggs, R. W. and Huffman, R. L. (2011), Transactions of the ASABE, 54(6), 2129-2137.
Long-term hydrology and water quality of a drained pine plantation in North Carolina
Amatya, D. M. and Skaggs, R. W. (2011), Transactions of the ASABE, 54(6), 2087-2098.
Effect of controlled drainage on water and nitrogen balances in drained lands
Skaggs, R. W. and Youssef, M. A. and Gilliam, J. W. and Evans, R. O. (2010), Transactions of the ASABE, 53(6), 1843-1850.
Energy and water balance of two contrasting loblolly pine plantations on the lower coastal plain of North Carolina, USA
Sun, G. and Noormets, A. and Gavazzi, M. J. and McNulty, S. G. and Chen, J. and Domec, J. C. and King, J. S. and Amatya, D. M. and Skaggs, R. W. (2010), Forest Ecology and Management, 259(7), 1299-1310.
Energy and water balance of two contrasting loblolly pine plantations on the lower coastal plain of North Carolina, USA (vol 259, pg 1299, 2010)
Noormets, A. and Sun, G. and McNulty, S. G. and Gavazzi, M. J. and Chen, J. and Domec, J. C. and King, J. S. and Amatya, D. M. and Skaggs, R. W. (2010), Forest Ecology and Management, 260(1), 169-169.
Impacts of fertilization on water quality of a drained pine plantation: A worst case scenario
Beltran, B. J. and Amatya, D. M. and Youssef, M. and Jones, M. and Callahan, T. J. and Skaggs, R. W. and Nettles, J. E. (2010), Journal of Environmental Quality, 39(1), 293-303.
Modelling discharge from a coastal watershed in southeast Sweden using an integrated framework
Salazar, O. and Joel, A. and Wesstrom, I. and Linner, H. and Skaggs, R. W. (2010), Hydrological Processes, 24(26), 3837-3851.
Temperature coefficient for modeling denitrification in surface water sediments using the mass transfer coefficient
Appelboom, T. W. and Chescheir, G. M. and Birgand, F. and Skaggs, R. W. and Gilliam, J. W. and Amatya, D. (2010), Transactions of the ASABE, 53(2), 465-474.
A method to determine lateral effect of a drainage ditch on wetland hydrology: Field testing
Phillips, B. D. and Skaggs, R. W. and Chescheir, G. M. (2010), Transactions of the ASABE, 53(4), 1087-1096.
Evaluation of the DRAINMOD-N II model for predicting nitrogen losses in a loamy sand under cultivation in south-east Sweden
Salazar, O. and Wesstrom, I. and Youssef, M. A. and Skaggs, R. W. and Joel, A. (2009), Agricultural Water Management, 96(2), 267-281.
Nitrogen balance for a plantation forest drainage canal on the North Carolina coastal plain
Appelboom, T. W. and Chescheir, G. M. and Skaggs, R. W. and Gilliam, J. W. and Amatya, D. M. (2008), Transactions of the ASABE, 51(4), 1215-1233.
Application of DRAINMOD-GIS to a lower coastal plain watershed
Fernandez, G. and Chescheir, G. M. and Skaggs, R. W. and Amatya, D. M. (2007), Transactions of the ASABE, 50(2), 439-447.
Criteria for calculating drain spacing and depth
Skaggs, R. W. (2007), Transactions of the ASABE, 50(5), 1657-1662.
Influence of thinning loblolly pine (Pinus taeda L.) on hydraulic properties of an organic soil
Grace, J. M. and Skaggs, R. W. and Cassel, D. K. (2007), Transactions of the ASABE, 50(2), 517-522.
Nitrogen removal in streams of agricultural catchments - A literature review
Birgand, F. and Skaggs, R. W. and Chescheir, G. M. and Gilliam, J. W. (2007), Critical Reviews in Environmental Science and Technology, 37(5), 381-487.
Simulating nitrogen leaching and turnover in a subsurface-drained grassland receiving animal manure in Northern Germany using DRAINMOD-N II
Bechtold, I. and Kohne, S. and Youssef, M. A. and Lennartz, B. and Skaggs, R. W. (2007), Agricultural Water Management, 93(1-2), 30-44.
Simulating the water budgets of natural Carolina bay wetlands
Caldwell, P. V. and Vepraskas, M. J. and Skaggs, R. W. and Gregory, J. D. (2007), Wetlands (Wilmington, N.C.), 27(4), 1112-1123.
Simulation of the hydrologic effects of afforestation in the Tacuarembo River basin, Uruguay
Stackelberg, N. O. and Chescheir, G. M. and Skaggs, R. W. and Amatya, D. M. (2007), Transactions of the ASABE, 50(2), 455-468.
Substrate organic matter to improve nitrate removal in surface-flow constructed wetlands
Burchell, M. R. and Skaggs, R. W. and Lee, C. R. and Broome, S. and Chescheir, G. M. and Osborne, J. (2007), Journal of Environmental Quality, 36(1), 194-207.
DRAINMOD-GIS: A lumped parameter watershed scale drainage and water quality model
Fernandez, G. P. and Chescheir, G. M. and Skaggs, R. W. and Amatya, D. M. (2006), Agricultural Water Management, 81(38719), 77-97.
Drainage design coefficients for eastern United States
Skaggs, R. W. and Youssef, M. A. and Chescheir, G. M. (2006), Agricultural Water Management, 86(1-2), 40-49.
Field evaluation of a model for predicting nitrogen losses from drained lands
Youssef, M. A. and Skaggs, R. W. and Chescheir, G. M. and Gilliam, J. W. (2006), Journal of Environmental Quality, 35(6), 2026-2042.
Hydrologic and water quality effects of thinning loblolly pine
Grace, J. M. and Skaggs, R. W. and Chescheir, G. M. (2006), Transactions of the ASABE, 49(3), 645-654.
Modeling denitrification in terrestrial and aquatic ecosystems at regional scales
Boyer, E. W. and Alexander, R. B. and Parton, W. J. and Li, C. S. and Butterbach-Bahl, K. and Donner, S. D. and Skaggs, R. W. and Del Gross, S. J. (2006), Ecological Applications, 16(6), 2123-2142.
Soil physical changes associated with forest harvesting operations on an organic soil
Grace, J. M. and Skaggs, R. W. and Cassel, D. K. (2006), Soil Science Society of America Journal, 70(2), 503-509.
Development and testing of watershed-scale models for poorly drained soils
Fernandez, G. P. and Chescheir, G. M. and Skaggs, R. W. and Amatya, D. M. (2005), Transactions of the ASAE, 48(2), 639-652.
Effect of drainage intensity on nitrogen losses from drained lands
Skaggs, R. W. and Youssef, M. A. and Chescheir, G. M. and Gilliam, J. W. (2005), Transactions of the ASAE, 48(6), 2169-2177.
Hydrologic and water-quality response of forested and agricultural lands during the 1999 extreme weather conditions in eastern North Carolina
Shelby, J. D. and Chescheir, G. M. and Skaggs, R. W. and Amatya, D. M. (2005), Transactions of the ASAE, 48(6), 2179-2188.
Sensitivity analyses of the nitrogen simulation model, DRAINMOD-N II
Wang, X. and Youssef, M. A. and Skaggs, R. W. and Atwood, J. D. and Frankenberger, J. R. (2005), Transactions of the ASAE, 48(6), 2205-2212.
Shallow subsurface drains to reduce nitrate losses from drained agricultural lands
Burchell, M. R. and Skaggs, R. W. and Chescheir, G. M. and Gilliam, J. W. and Arnold, L. A. (2005), Transactions of the ASAE, 48(3), 1079-1089.
The nitrogen simulation model, DRAINMOD-N II
Youssef, M. A. and Skaggs, R. W. and Chescheir, G. M. and Gilliam, J. W. (2005), Transactions of the ASAE, 48(2), 611-626.
Calibrating hydric soil field indicators to long-term wetland hydrology
Vepraskas, M. J. and He, X. and Lindbo, D. L. and Skaggs, R. W. (2004), Soil Science Society of America Journal, 68(4), 1461-1469.
DRAINWAT-based methods for estimating nitrogen transport in poorly drained watersheds
Amatya, D. M. and Chescheir, G. M. and Fernandez, G. P. and Skaggs, R. W. and Gilliam, J. W. (2004), Transactions of the ASAE, 47(3), 677-687.
GLEAMS-SWT with nutrients
Reyes, M. R. and Skaggs, R. W. and Bengtson, R. L. (2004), Transactions of the ASAE, 47(1), 129-132.
Modification and use of DRAINMOD to evaluate a lagoon effluent land application system
Ha, Z. and Evans, R. O. and Luo, W. and Skaggs, R. W. (2004), Transactions of the ASAE, 47(1), 47-58.
Effect of parameter uncertainty on DRAINMOD predictions: I. Hydrology and yield
Haan, P. K. and Skaggs, R. W. (2003), Transactions of the ASAE, 46(4), 1061-1067.
Effect of parameter uncertainty on DRAINMOD predictions: II. Nitrogen loss
Haan, P. K. and Skaggs, R. W. (2003), Transactions of the ASAE, 46(4), 1069-1075.
Effects of orifice-weir outlet on hydrology and water quality of a drained forested watershed
Amatya, D. M. and Skaggs, R. W. and Gilliam, J. W. and Hughes, J. H. (2003), Southern Journal of Applied Forestry, 27(2), 130-142.
Effects of subsurface drain depth on nitrogen losses from drained lands
Skaggs, R. W. and Chescheir, G. M. (2003), Transactions of the ASAE, 46(2), 237-244.
A method to predict soil saturation frequency and duration from soil color
He, X. and Vepraskas, M. J. and Lindbo, D. L. and Skaggs, R. W. (2003), Soil Science Society of America Journal, 67(3), 961-969.
Adapting a drainage model to simulate water table levels in coastal plain soils
He, X. and Vepraskas, M. J. and Skaggs, R. W. and Lindbo, D. L. (2002), Soil Science Society of America Journal, 66(5), 1722-1731.
Economics of nitrate losses from drained agricultural land
El-Sadek, A. and Feyen, J. and Skaggs, W. and Berlamont, J. (2002), Journal of Environmental Engineering (New York, N.Y.), 128(4), 376-383.
Management practices for sediment reduction from forest roads in the coastal plains
Appelboom, T. W. and Chescheir, G. M. and Skaggs, R. W. and Hesterberg, D. L. (2002), Transactions of the ASAE, 45(2), 337-344.
Watgis: A GIS-based lumped parameter water quality model
Fernandez, G. P. and Chescheir, G. M. and Skaggs, R. W. and Amatya, D. M. (2002), Transactions of the ASAE, 45(3), 593-600.
A comparison of the watershed hydrology of coastal forested wetlands and the mountainous uplands in the Southern US
Sun, G. and Mcnulty, S. G. and Amatya, D. M. and Skaggs, R. W. and Swift, L. W. and Shepard, J. P. and Riekerk, H. (2002), Journal of Hydrology, 263(1-4), 92-104.
Effects of timber management on the hydrology of wetland forests in the southern United States
Sun, G. and McNulty, S. G. and Shepard, J. P. and Amatya, D. M. and Riekerk, H. and Comerford, N. B. and Skaggs, W. and Swift, L. (2001), Forest Ecology and Management, 143(1-3), 227-236.
Hydrologic modeling of a drained pine plantation on poorly drained soils
Amatya, D. M. and Skaggs, R. W. (2001), Forest Science, 47(1), 103-114.
Predicting field hydrology in cold conditions with DRAINMOD
Luo, W. and Skaggs, R. W. and Madani, A. and Cizikci, S. and Mavi, A. (2001), Transactions of the ASAE, 44(4), 825-834.
Analysis of DRAINMOD performances with different detail of soil input data in the Veneto region of Italy
Borin, M. and Morari, F. and Bonaiti, G. and Paasch, M. and Skaggs, R. W. (2000), Agricultural Water Management, 42(3), 259-272.
Climate change impacts on the hydrology and productivity of a pine plantation
Sun, G. and Amatya, D. M. and McNulty, S. G. and Skaggs, R. W. and Hughes, J. H. (2000), Journal of the American Water Resources Association, 36(2), 367-374.
DRAINMOD modifications for cold conditions
Luo, W. and Skaggs, R. W. and Chescheir, G. M. (2000), Transactions of the ASAE, 43(6), 1569.
Effects of controlled drainage on storm event hydrology in a loblolly pine plantation
Amatya, D. M. and Gregory, J. D. and Skaggs, R. W. (2000), Journal of the American Water Resources Association, 36(1), 175-190.
Drains in depth. Studies focus on nitrogen losses from agricultural lands
Skaggs, R. W. and Chescheir, G. M. (1999), Resource, Engineering & Technology for a Sustainable World, 6(9), 13.
Effects of controlled drainage on forest water quality
Amatya, D. M. and Gilliam, J. W. and Skaggs, R. W. and Lebo, M. E. and Campbell, R. G. (1998), Journal of Environmental Quality, 27(4), 923-935.
Lumped parameter water quality modeling using a probabilistic approach
Skaggs, W. (1998), Report (Water Resources Research Institute of the University of North Carolina), (1998 Apr. 1), .
Using the DRAINMOD-N model to study effects of drainage system design and management on crop productivity, profitability and NO3-N losses in drainage water
Breve, M. A. and Skaggs, R. W. and Parsons, J. E. and Gilliam, J. W. (1998), Agricultural Water Management, 35(3), 227-243.
DRAINMOD-N, a nitrogen model for artificially drained soils
Breve, M. A. and Skaggs, R. W. and Parsons, J. E. and Gilliam, J. W. (1997), Transactions of the ASAE, 40(4), 1067-1075.
Evaluation of a watershed scale forest hydrologic model
Amatya, D. M. and Skaggs, R. W. and Gregory, J. D. (1997), Agricultural Water Management, 32(3), 239-258.
Field testing of DRAINMOD-N
Breve, M. A. and Skaggs, R. W. and Gilliam, J. W. and Parsons, J E. and Mohammad, A. T. and Chescheir, G. M. and Evans, R. O. (1997), Transactions of the ASAE, 40(4), 1077-1085.
Hydrologic modeling of a complex wetland
Giraud, F. and Faure, J. B. and Zimmer, D. and Lefeuvre, J. C. and Skaggs, R. W. (1997), Journal of Irrigation and Drainage Engineering, 123(5), 344-353.
Hydrology of a drained forested pocosin watershed
Amatya, D. M. and Skaggs, R. W. and Gregory, J. D. and Herrmann, R. B. (1997), Journal of the American Water Resources Association, 33(3), 535-546.
Predicting effects of water table management on loss of nitrogen from poorly drained soils
Skaggs, R. W. and Breve, M. A. and Gilliam, J. W. (1995), European Journal of Agronomy, 4(4), 441.
Simulation of drainage water quality of DRAINMOD
Skaggs, R. W. and Breve, M. A. and Mohammad, A. T. and Parsons, J. E. and Gilliam, J. W. (1995), Irrigation and Drainage Systems, 9(3), 259.
Characterization and evaluation of proposed hydrologic criteria for wetlands
Skaggs, R. W. and Amatya, D. and Evans, R. O. and Parsons, J. E. (1994), Journal of Soil & Water Conservation, 49(5), 501.
Hydrologic and water quality impacts of agricultural drainage
Skaggs, R. W. and Breve, M. A. and Gilliam, J. W. (1994), Critical Reviews in Environmental Science and Technology, 24(1), 1.
Optimum drainage for corn production
Skaggs, R. W. and Nassehzadeh-Tabrizi, A. (1983), Technical Bulletin (North Carolina Agricultural Experiment Station), (274), 41.
Subsurface drainage effects on erosion
Skaggs, R. W. and Nassehzadeh-Tabrizi, A. and Foster, G. R. (1982), Journal of Soil & Water Conservation, 37(3), 167.
Effect of drainage system design and operation on nitrate transport
Skaggs, R. W. and Gilliam, J. W. (1981), Transactions of the ASAE, 24(4), 929.
Water management model evaluation for North Central Ohio
Skaggs, R. W. and Fausey, N. R. and Nolte, B. H. (1981), Transactions of the ASAE, 24(4), 922.
A water management model for artificially drained soils
Skaggs, R. W. (1980), Technical Bulletin (North Carolina Agricultural Experiment Station), (267), 54.
Effect of drain diameter, openings and envelopes on water table drawdown
Skaggs, R. W. and Tang, Y. K. (1979), Transactions of the ASAE, 22(2), 326.
Simulation of crop response to surface and subsurface drainage systems
Skaggs, R. W. and Hardjoamidjojo, S. and Wiser, E. H. (1979), Paper (American Society of Agricultural Engineers), (79-2555), 13.
Water management model evaluation for North Central Ohio
Skaggs, R. W. and Fausey, N. R. and Nolte, B. H. (1979), Paper (American Society of Agricultural Engineers), (79-2070), 25.
Water movement factors important to design and operation of subirrigation systems
Skaggs, R. W. (1979), Paper (American Society of Agricultural Engineers), (79-2543), 16.
Effect of drain tube openings on water-table drawdown
Skaggs, R. W. (1978), Journal of the Irrigation and Drainage Division, 104(), 13.
Water table movement during subirrigation
Skaggs, R. W. (1973), Transactions of the ASAE, 16(5), 988.

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Grants

Effects of Silvicultural Practices on Hydrology and Water Quality of Drained Forested Lands
Weyerhaeuser NR Company (subsidiary of Weyerhaeuser)(1/01/14 - 12/31/18)
DRAINMOD Training Materials for USDA-NRCS
US Dept. of Agriculture - Natural Resources Conservation Service (USDA NRCS)(9/01/13 - 12/31/16)
T25 for Determining Lateral Effects of Drains on Wetland Hydrology
US Dept. of Agriculture - Natural Resources Conservation Service (USDA NRCS)(9/01/13 - 12/31/15)
Demonstration and evaluation of effective drainage water management for conserving water, increasing crop yields and profits and improving water quality
Environmental Defense Fund(4/01/13 - 10/31/16)
Automated Water Control Structures for Increased Soybean Yield and Quality
NC Soybean Producers Association, Inc.(4/01/12 - 3/31/15)
Effects of Biofuel Planting, Growth, and Harvesting on the Hydrology and Water Quality of Pine Plantations
Weyerhaeuser NR Company (subsidiary of Weyerhaeuser)(4/19/12 - 12/31/15)
Development, Evaluation, and Demonstration of Simple Tools For Nitrogen Credit Trading System Involving Drainage Water Management
US Dept. of Agriculture (USDA)(9/21/12 - 6/30/15)
A Smart Water Management System to Increase Crop Yields and Profits, Conserve Water, and Improve Water Quality for Crop Production Systems on Artificially Drained Lands
US Dept. of Agriculture (USDA)(4/01/12 - 3/31/16)
Automated Water Control Structures For Increased Water Use Efficiency on Agricultural Drained Lands
US Dept. of Agriculture (USDA)(9/15/11 - 9/30/14)
Optimization of Southeastern Forest Biomass Crop Production: A Watershed Scale Evaluation of the Sustainability and Productivity of Dedicated Energy Crop and Woody Biomass Operations
US Dept. of Energy (DOE)(9/30/10 - 9/30/16)