报告人：H. M. Selim教授
报告题目：1、Herbicide Retention in Soil: Soil Conservation/Runoff
2、Reducing Runoff and Sediments in Bayou Wikoff Sub-Watershed
时 间：2006年11月13日（星期一）上午9:00
地 点：华家池校区中心大楼南楼106室
联系人：徐建明
联系电话：0571-86971955
欢迎广大师生参加！
环境与资源学院
2006年11月7日
BIOGRAPHICAL DATA
H.Magdi Selim
Professor of Soil Physics & Caldwell Endowed Professor of Soils
Technical Editor, Journal of Environmental Quality & Departmental Graduate Coordinator
EDUCATION
Ph.D., Soil Physics, Iowa State University; 1971
M.S., Soil Physics, Iowa State University; 1969
B.S., Soil Science, Alexandria University; 1964
TEACHING
AGRO 4077 (EMS 4077) - Environmental Soil Physics (3 Credits).
AGRO 7057 (EMS 7057) - Advanced Soil Physics (4 Credits)
HATCH RESEARCH PROJECTS
◆Development and Evaluation of TMDL Planning and Assessment � S1004
◆Fate of Applied Herbicides in Alluvial Soils as Affected by Management Practices
ACADEMIC EXPERIENCE:
Louisiana State University, Professor, Baton Rouge, Louisiana,1984 - present
Louisiana State University, Associate Professor, Baton Rouge, Louisiana, 1980 - 1984
Louisiana State University, Assistant Professor, Baton Rouge, Louisiana, 1977 - 1980
PROFESSIONAL AND SCHOLARLY ORGANIZATIONS
American Society of Agronomy
Soil Science Society of America
International Society of Soil Science
International Society of Trace Element Biogeochemistry
Gamma Sigma Delta
Sigma Xi
HONORS AND AWARDS
International Society of Trace Element Biogeochemistry �
Executive Board � (2003)
Chair - Soil Physics Division (S-1) - Soil Science Society of America (2001)
The Sedberry Foundation Graduate Teaching Award (1999)
Fellow of the American Society n of Agronomy (1996)
Fellow of the Soil Science Society of America (1996)
Doyle Chambers Research Achievements Award (1996)
EPA Regional Administrator's Environmental Excellence Award (1996)
Gamma Sigma Delta Award for Outstanding Research (1991).
First Mississippi Corporation Award for Outstanding Research (1982).
Phi Kappa Phi Research Award (1980).
RESEARCH ACTIVITIES
Authored and coauthored over 100 scientific papers, bulletins, and book chapters. He authored and edited several books and monographs. He developed several models including the two-site and second-order models for describing the processes of retention of dissolved chemicals in soils and natural materials in porous media. His subsequent multi-step/multi-reaction and nonlinear kinetic models have been successfully used for the description of heavy metals, radio-nuclides, explosive contaminants, phosphorus, and pesticides in soils and subsurface media. Ongoing research includes implementation and monitoring of management approaches to identify sources of pollutants at the watershed scale, thus reducing total maximum daily loads (TMDLs). Other areas of research include hydrodynamic properties controlling the dispersion/diffusion of tracers and contaminants in hydrologic systems; and fate of heavy metals in soils: potential mobility in the environment. Recent research emphasize best management practices for applied chemicals to soil: runoff and subsurface water losses; enhancing the effectiveness of sugarcane residue (mulch cover) in reducing nonpoint source contamination of applied herbicides from sugarcane fields; and assessing changes in herbicide retention characteristics as a function of the age of the mulch as the residue decays in the field.
LIST of PUBLICATIONS:
Books Written:
Selim, H. M. and M. C. Amacher. 1997. Reactivity and Transport of Heavy Metals in Soils. CRC, Boca Raton, FL (240 p).
Books Edited:
Pachepsky, Y., D. E. Radcliffe and H. M. Selim (eds). 2003. Bridging scales in soil physics. CRC/Lewis, Boca Raton, FL. (434).
Selim, H. M. and W. L. Kingery. (eds). 2003. Geochemical and Hydrological Reactivity of Heavy Metals in Soils. CRC/Lewis, Boca Raton, FL. (360p).
Selim, H. M. and D. L. Sparks. (eds). 2001. Heavy Metals Release in Soils. CRC Press, Boca Raton, FL (300p).
Selim, H. M. and D. L. Sparks. (eds). 2001. Physical and Chemical Processes of Water and Solute Transport/Retention in Soil. Soil Science Society of America, Madison, WI
(280p).
Selim, H. M. and I. K. Iskandar.1999. Fate and Transport of Heavy Metals in the Vadose Zone. Ann Arbor Press, Chelsea, MI (320p).
Selim, H. M. and L. Ma. 1998. Physical Nonequilibrium in Soils: Modeling and Application. Ann Arbor Press, Chelsea, MI (520p).
Iskandar, I. K. and H. M. Selim. 1992. Engineering Aspects of Metal Waste Management. CRC/Lewis Publishers, Boca Raton (231 p).
Monographs and/or Special Books:
Selim, H. M. and W. H. Brown. 1995. Proceeding Conference on Environmental Issues. July 24-25, 1995, Baton Rouge, Louisiana. Louisiana State University Agricultural Center (215p).
Selim, H. M. (ed). 1994. Catalog/Directory of Environmental Research at the Louisiana
Agricultural Experiment Station. Louisiana State University Agricultural Center (99p).
Selim, H. M., M. C. Amacher and I. K. Iskandar. 1990. Modeling the Transport of Heavy Metals in Soils. CRREL Monograph 2, U.S. Government Printing Office (152 p).
Selim, H. M., H. Flühler and R. Schulin (editors). l986. Mechanisms of Ion Transport in Soils. Special Issue, Geoderma 38, Elsevier. (311 p).
Book Chapters:
Selim, H. M. 1979. Water Flow Theory and Soil Drainage. In The Encyclopedia of Soil
Science, Part I. Dowden, Hutchinson and Ross, Inc., Stroudsburg, Pa.
Mansell, R. S. and H. M. Selim. 1981. Mathematical models for predicting reactions and
transport of applied phosphorus to soils. Chapter 21 In Modeling Wastewater Renovation; Land Treatment. Wiley-Interscience, N.Y., N.Y.
Iskandar, I. K. and H. M. Selim. 1981. Validation of a model for predicting nitrogen behavior in slow infiltration systems. Chapter 18 In Modeling Wastewater Renovation; Land Treatment. Wiley-Interscience, N.Y., N.Y.
Selim, H. M. and I. K. Iskandar. 1981. A model for predicting nitrogenbehavior in slow and rapid infiltration systems. Chapter 17 In Modeling Wastewater Renovation; Land Treatment. Wiley-Interscience. N.Y., N.Y.
Selim, H. M. and I. K. Iskandar. 1981. WASTEN; A model for nitrogen behavior in multilayered soils irrigated with wastewater. In Simulation of Nitrogen Behavior of Soil-Plant Systems. Pudoc, Wageningen, The Netherlands.
Selim, H. M., R. S. Mansell, L. A. Gaston, H. Flühler, and R. Schulin. 1990. Prediction of cation transport in soils using cation exchange reactions. pp 223-238. In Field-Scale solute and water transport through soils, K. Roth et al. (eds.), Birkhauser Verlag, Basel.
Selim, H. M. and R. Schulin. 1990. Evaluation of soil properties from point measurements. pp 17-21. In Field-Scale solute and water transport through soils, K. Roth et al. (eds.), Birkhauser Verlag, Basel.
Selim, H. M. 1992. Modeling the Transport and Retention of Inorganics in Soils. Advances in Agron, Academic Press, vol 47, 331-384.
Selim, H. M. 1994. Soils: Chemicals, movement and retention. Book Chapter in Encyclopedia of Agricultural Science (pp. 63-74). Academic Press, New York.
Journal Articles and Bulletins:
1970
1. Selim, H. M. and D. Kirkham. 1970. Soil temperature and water content changes during drying as influenced by cracks; a laboratory experiment. Soil Sci. Soc. Amer. Proc. 34:565-569.
2. Selim, H. M., D. Kirkham, and M. Amemiya. 1970. A comparison of two methods for determining soil water diffusivity. Soil Sci. Soc. Amer. Proc. 34:14-18.
1973
1. Selim, H. M. and D. Kirkham. 1973. Unsteady two-dimensional flow of water in unsaturated soils above an impervious barrier. Soil Sci. Soc. Amer. Proc. 37:489-495.
1974
1. Selim, H. M. and D. Kirkham. 1974. Unsteady state two-dimensional water content distributions and wetting fronts in soils. Georderma. 11:259-274.
2. Selim, H. M. and R. S. Mansell. 1974. Transient one-dimensional and simultaneous solute and water flow in soils. Share Program Library, 360:d-17.4.003 (48 p.).
1975
1. Selim, H. M. 1975. Water flow through multilayered stratified hillside. Water Resources
Research. 11:949-957.
2. Selim, H. M., P. Kanchanasut, R. S. Mansell, L. W. Zelazny, and J. M. Davidson. 1975.
Phosphorus and chloride movement in a Spodosol. Soil and Crop Sci. Soc. Fla. Proc. 34:18-23.
3. Mansell, R. S., L. W. Zelazny, L. C. Hammond, and H. M. Selim. 1975. Nutrient distributions in a Spodosol during corn growth. Soil and Crop Sci. Soc. Fla. Proc. 34:24-29.
4. Selim, H. M., M. S. Selim, and D. Kirkham. 1975. Mathematical analysis of steady saturated flow through a multilayered soil with a sloping surface. Soil Sci. Soc. Amer. Proc. 39:445-453.
1976
1. Selim, H. M., R.S. Mansell, and A. Elzeftawy.1976. Distributions of 2 4-D and water in soil during infiltration and redistribution. Soil Sci. 121: 176-183.
2. Selim, H. M. and R. S. Mansell. 1976. Analytical solution of the equation of reactive solutes through soils. Water Resources Res. 12:528-532.
3. Selim, H. M., J. M. Davidson, and R. S. Mansell. 1976. Evaluation of a two-site adsorptiondesorption-model for describing solute transport in soils. Proc. Summer Computer Simulation Conf. 444-448.
4. Selim, H. M., R. S. Mansell, and L. W. Zelazny. 1976. Modeling reactions and transport of potassium in soils. Soil Sci. 122:77-84.
5. Rao, P. S. C., H. M. Selim, J. M. Davidson, and D. A. Graetz. 1976. Simulation of
transformations and transport of selected nitrogen species in soils. Soil and Crop Sci. Soc. Fla. Proc. 35:161-164.
6. Elzeftawy, A., R. S. Mansell, and H. M. Selim. 1976. Distributions of water and herbicide in Lakeland sand during initial stages of infiltration. Soil Sci.122:297-307.
7. Mansell, R. S., F. M. Rhoads, L. C. Hammond, H. M. Selim, W. B. Wheeler, and L. W. Zelazny. 1976. Movement of fertilizer and herbicide through irrigated sand. Fla. Water Resources Res. Center. Publ. No. 38.
1977
1. Selim, H. M., J. M. Davidson, and P. S. C. Rao. 1977. Transport of reactive solutes through multilayered soils. Soil Sci. Soc. Amer. J. 41:3-10.
2. Mansell, R. S., H. M. Selim, P. Kanchanasut, J. M. Davidson, and J. G. A. Fiskell. 1977. Experimental and simulated transport of phosphorus through sandy soils. Water Resources Research 13:189-194.
3. Mansell, R. S., H. M. Selim, and J. G. A. Fiskell. 1977. Simulated transformations and transport of phosphorus in soils. Soil Sci. 124:102-109.
4. Davidson, J. M., P. S. C. Rao, R. E. Green, and H. M. Selim. 1977 Evaluation of conceptual processes model for solute behavior in soil water systems. Proc. Symp. Agrochem. in Soils, 241-251.
5. Davidson, J. M., P. S. C. Rao, and H. M. Selim. 1977. Simulation of nitrogen movement, transformations and plant uptake in the rootzone. Proc. National Conference on Irrigation Return Flow Quality Management, Ft. Collings, pp. 9-18.
6. Mansell, R. S., S. J. Locascio, H. M. Selim, L. C. Hammond, and J. M. Myers. 1977. Nutrient and water distributions in sandy soils during growth of irrigated strawberries. Soil and Crop Sci. Soc. Fla. Proc. 36:107-113.
7. Selim, H. M., L. C. Hammond, and R. S. Mansell. 1977. Soil and water movement and uptake by plants during water infiltration and redistribution. Soil and Crop Sci. Soc. Fla. Proc. 36:101-107.
8. Selim, H. M. and R. S. Mansell. 1977. Analytical solution of the equation of reactive solutes through soils, Reply. Water Resources Research. 13:703-704.
9. Selim, H. M. and J. M. Davidson. 1977. Numerical solution of nitrogen transformations and transport equations during transient unsaturated water flow in soils. Share Program Library, 36010 - 17.4.005.
10. Davidson, J. M., D. A. Graetz, P. S. C. Rao, and H. M. Selim. 1977. Simulation of nitrogen movement, transformations and uptake in the plant root zone. Environm. Protection Techn. Series. 600/3-78-029.
1978
1. Iskandar, I. K. and H. M. Selim. 1978. Evaluation of N Models for prediction of percolate water quality in land treatment. In Intern. Symp. on Land Treatment of Wastewater. 163-169.
2. Selim, H. M. and I. K. Iskandar. 1978. A simplified nitrogen model for land treatment of waste water. In International Symp. on Land Treatment of Wastewater. 171-179.
Selim, H. M. 1978. Evaluation of a multistep model for describing phosphorus transformations and transport in soils. Proc. Summer Computer Simulation Conference. 647-653.
3. Selim, H. M. 1978. Transport of reactive solutes during transient unsaturated water flow in multilayered soils. Soil Sci. 126:127-135.
4. Selim, H. M., W. H. Patrick, Jr., R. E. Henderson, and W. H.Boyd. 1978. Effect of subsurface drainage on soil oxygen content and plant root development in Mississippi River alluvial soils. Completion Rep., USDA/CSRS, 9l b.
1979
1. Fiskell, J., R. S. Mansell, H. M. Selim, and F. G. Martin. 1979. Kinetic behavior of phosphate sorption by acid sandy soil. J. Environm. Quality. 8:579-584.
2. Selim, H. M. and D. P. Bligh. 1979. Soil physiochemical factors controlling solubility and bioavailability of toxic heavy metals in municipal sewage sludge added to soils. Completion Rep., USDA/ARS 91No. 52.
3. Rao, P., J. M. Davidson, R. E. Jessup, and H. M. Selim. 1979. Evaluation of conceptual models for describing nonequilibrium absorption-desorption of pesticides during steady-flow of water in soils. Soil Sci. Soc. Amer. J. 43:22-28.
1980
1. Selim, H. M. and I. K. Iskandar. 1980. Simplified model for prediction of nitrogen behavior in land treatment of wastewater. CRREL Rept. 80-12, 49 p.
Selim, H. M. and R. D. Voth. 1980. Soil Water behavior under different tillage practices. La. Agric. 23:14-15.
2. Selim, H. M. 1980. Prediction of water and nitrogen behavior in multilayered soils; Evaluation of two conceptional models. S.C.S.C. 3355-340.
3. Mansell, R. S., H. M. Selim, and D. V. Calvert. 1980. Spatial distributions of nutrients and water in a subsurface drained spodosol. Soil Sci. Soc. Amer. J. 44:95-102.
1981
1. Selim, H. M. and I. K. Iskandar. 1981. Modeling nitrogen transport and transformations in soils: 1. Theoretical considerations. Soil Sci. 131:233-241.
Iskandar, I. K. and H. M. Selim. 1981. Modeling nitrogen transport and transformations in soils: 2. Validation. Soil Sci. 131:303-312.
2. Selim, H. M. 1981. Modeling kinetic behavior of cadmium interactions in soils. S.C.S.C. 385-390.
3. Hammond, L. C., R. S. Mansell, W. K. Robertson, J. T. Johnson, and H. M. Selim. 1981. Irrigation efficiency and controlled root-zone wetting in deep sands. Fla. Water Resources Res.Center. Publication No. 52.
1982
1. Selim, H. M. 1982. Modeling nitrogen behavior in the soil profile. Int. Assoc. Hydrolog. Symp.Prague, Czechoslovakia, Vol. 16, pp. 127-138.
2. Kingery, W. L., D. R. Melville and H. M. Selim. 1982. Evaluation of a model for irrigation of cotton on a Red River soil. Proc. La. Assoc. of Agron. 23:22-32.
3. Selim, H. M., C. E. Carter and E. D. Aviles. 1982. Movement and retention of water in a clay textured soil. Adv. in Drainage. Proc. Fourth Nat. Drainage Symp., Amer. Soc. Agric. Engnrs.l28-l38.
1983
1. Kizza, P. N., J. W. Biggar, M. T. van Genutchen, P. J. Wierenga, H. M. Selim, J. M. Davidson, and D. R. Nielsen. 1983. Modeling tritium and chloride-36 transport through a porous medium (oxisol) exhibiting physical nonequilibrium adsorption. Water Res. Res. 19:691-700.
2. Selim, H. M., M. Mehran, K. W. Tanji and I. K. Iskandar. 1983. Mathematical simulation of nitrogen interactions in soils. Mathematics and Computers in Simulation. 25:241-248.
Selim, H. M. l983. Mathematical modeling of phosphate sorption as influenced by soil
temperature. Modeling and Simulation Symposium, IASTED; Lugano, Switzerland. 33l-334.
3. Selim, H. M., D. R. Melville, and W. L. Kingery.l983. Scheduling supplemental irrigation for cotton. La. Agric. 26:l2-l4.
4. Selim, H. M., D. R. Melville, and B. Y. Davidoff. l983. Influence of winter cover crops on soil physical properties of a Norwood soil planted to cotton. Compl. Rept. to Cotton Inc. (30 p.).
1984
1. Kizza, P. N., J. W. Biggar, H. M. Selim, P. J. Wierenga, M. T. van Genutchen, J. M. Davidson and D. R. Nielsen. 1984. Comparison of two conceptual models for ion exchange during transport through aggregated porous medium. Water Res. Res. 20:ll23-ll30.
2. Amacher, M. C., J. Amacher, I. K. Iskandar, and H. M. Selim. 1984. Sorption and release of metals by soils. U. S. Army CRREL, Task Compl. Reprt.
3. Dabney, S. M., H. M. Selim, et al. l984. Reduced tillage research in Louisiana. La. Agric. Exp. Sta. Bull. No. 765.
1985
1. Schulin, R., H. M. Selim, and H. Flühler. l985. The significance of the soil skeleton on the displacement and spatial distribution of solution in a Redzina. Z. dt. geol. Ges. l36:397-405.
2. Flühler, H., P. Ferlin, H. M. Selim, and R. Schulin. l985. Transport of floride, bromide and chloride in soil columns and in a soil profile. Z. dt. geol. Ges. l36:375-383.
3. Selim, H. M., H. Flühler, and R. Schulin. l985. Simultaneous ion transport and exchange in aggregated porous media. Z. dt. geol. Ges. l36:385-396.
4. Romkens, M. J., H. M. Selim, R. E. Phillips and F. D. Whisler. l985. Physical characteristics of soils in the southern region; Vicksburg, Memphis, Maury Series. Southern Coop. Ser. Bull. 266.
1986
1. Davidoff, B., and H. M. Selim. l986. Goodness of fit for eight water infiltration models. Soil Sci. Soc. Amer. J. 50:759-764.
2. Davidoff, B., J. W. Lewis and H. M. Selim. l986. Variability of soil temperature along a transect. Soil Sci. l42:ll4-l23.
3. Mansell, R. S., S. A. Bloom, H. M. Selim, and R. D. Rhue. l986. Multispecies cation leaching during continuous displacement of electrolyte solutions through soil columns. Geoderma. 38:61-75.
4. Schulin, R., H. Flühler, R. S. Mansell, and H. M. Selim. l986. Miscible displacement of ions in aggregated soil. Geoderma 38:311-321.
5. Amacher, M. C., J. Kotuby-Amacher, H. M. Selim, and I. K. Iskandar. l986. Retention and release of metals by soil-evaluation of several models. Geoderma 38:131-154.
Romkens, M. J., H. M. Selim, H. D. Scott, and F. D. Whisler. l986. Physical characteristics of soils in the southern region; Captina, Gigger, Grenada, Loring, Olivier, and Sharkey Series. Southern Coop. Ser. Bull. 264.
6. Davidoff, B., J. W. Lewis, and H. M. Selim. l986. An improved method to verify the presence of a trend in studying spatial variability of soil temperature. Soil Sci. Soc. Am. J. 50:1122-1127.
7. Selim, H. M. l986. Experimental and simulated transport of phosphorus in soil. Congress of Int. Assoc. Hydrolog. Symp. Proc. Karlovy Vary, Czechoslovakia, 19:348-356.
1987
1. Selim, H. M. l987. Water seepage through multilayered anisotropic hillside. Soil Sci. Soc. Am. J. 5l:9-16.
2. Dabney, S. M. and H. M. Selim. 1987. Anisotropy of a fragipan soil: vertical vs horizontal hydraulic conductivity. Soil Sci. Soc. Am. J. 51:3-6.
3. Davidoff, B., and H. M. Selim. l987. Goodness of fit for eight water infiltration models; a reply. Soil Sci. Soc. Amer. J. 51:1088-1089.
4. Selim, H. M. 1987. Prediction of phosphate behavior during transport in soils. Proc. Intern.Conf. Impact of Physico-Chemistry on the Study, Design and Optimization of Precesses in Porous Media, Nancy, France, pp 293-301.
5. Amacher, M. C. and H. M. Selim. 1987. Prediction of reactive solute transport using nonlinear and second-order kinetic models. Proc. Intern. Conf. Impact of Physico-Chemistry on Processes in Porous Media, Nancy, France, pp 95-103.
6. Schulin, R., A. Papritz, H. Flühler, and H. M. Selim. 1987. Calcium and magnesium transport in aggregated soils. Proc. Intern. Conf. Impact of Physico-Chemistry on Processes in Porous Media, Nancy, France, pp 311-318.
7. Buchter, B., J. Leuenberger, F. Richards, H. Flühler and H. M. Selim. 1987. Preparation of large cross-sections from stony soils. Soil Sci. Soc. Am. J. 51:494-495.
8. Selim, H. M. , R. Schulin, and H. Flühler. 1987. Transport and ion exchange of calcium and magnesium in an aggregated soil. Soil Sci. Soc. Am. J. 51:876-884
9. Selim, M. S. and H. M. Selim. 1987. Effect of anisotropy on potential flow through a multilayer hillside. Annales Geophysicae. 5B: 545-552.
10. Selim, H. M., B. Y. Davidoff, H. Flühler, and R. Schulin. 1987. Variability of in situ measured mechanical impedance for a fragipan soil. Soil Sci. 144:442-452.
Flühler, H., and H. M. Selim. 1987. Ion exchange and ion transport in soils. Int. Soc. Soil Sci. Trans. Congress XIII:541-547.
11. Schulin, R. A. Papritz, H. Flühler, and H. M. Selim. 1987. Ion transport in soils with and without aggregates; Model comparison. Soil Sci. Soc. Germany Proc. 53:473-478.
Papritz, A., R. Schulin, H. Flühler, and H. M. Selim. 1987. Simultaneous transport of calcium and magnesium in aggregated soils. Soil Sci. Soc. Germany Proc. 53:459-466.
12. Selim, H. M. 1987. Description of the retention and mobility of heavy metals in soils; A multireaction model. A Completion Report to Army Corps of Engineers (DACA89-87-K0003).
1988
1. Davidoff, B. Y., and H. M. Selim. 1988. Correlation between spatially variable soil moisture content and soil temperature. Soil Sci. 145:1-10.
2. Davidoff, B, J. W. Lewis, and H. M. Selim. 1988 PCDRIFT, a program for calculation of the drift function for spatially variable soil physical properties. Louisiana Agric. Exp. Sta. Bull. 791. (29p).
3. Selim, H. M. 1988. Water flow in layered soils with sloping surface. Am. Soc. Civil Eng. Irrig. And Drainage Div. 144:442-462.
4. Amacher, M. C. , H. M. Selim, and I. K. Iskandar. 1988. Kinetics of chromium (VI) retention in soils: A nonlinear multi-reaction model. Soil Soc. Soc. Am. J. 52:398-408.
5. Rogers, R. S. and H. M. Selim. 1988. Steady State Flow to drains in multilayered anisotropic soils. Am. Soc. Agric. Eng. No. 88-2616, 23 p. ASCE, St. Joseph, MI
6. Mansell, R. S., S. A. Bloom, H. M. Selim, and R. D. Rhue. 1988. Simulated transport of multiple cations using variable selectivity coefficients. Soil Sci. Soc. Am. J. 52:1533-1540.
7. Selim, H. M. and M. C. Amacher. 1988. A second order kinetic approach for modeling solute retention transport in soils. Water Resources Research 24: 2061-2075.
1989
1. Selim, H. M., M. C. Amacher, and I. K. Iskandar. 1989. Modeling the transport of chromium(VI) in soil columns. Soil Sci. Soc. Am. J. 53: 996-1004.
2. Rogers, J. S., and H. M. Selim. 1989. Water flow through multilayered anisotropic hillsides in the presence of subsurface drains. Soil Sci. Soc. Am. J. 53:18-24.
3. Hogarth, W. L., J.-Y. Parlange, R. Haverkamp, B. Davidoff, and H. M. Selim. 1989. Application of an infiltration model to experimental data. Soil Sci. Soc. Am. J. 53:1913-1914.
4. Buchter, B, B. Y. Davidoff, M. C. Amacher, H. Hinz, I. K. Iskandar, and H. M. Selim. 1989. Correlation between Freundlich Kd and n retention parameters with soils and elements. Soil Sci. 148:370-379.
5. Burden, D. S. and H. M. Selim. 1989. Correlation of spatially variable soil water retention for a surface soil. Soil. Sci. 148:436-447.
6. Schulin, R., A. Papritz, H. Flühler, and H. M. Selim. 1989. Calcium and magnesium transport in aggregated soils at variable ionic strength. Geoderma 44:129-141.
7. Selim, H. M. 1989. Prediction of contaminant retention and transport in soils using multireaction models. Environm. Health Perspectives 39: 69-75.
8. Rogers, J. S., H. M. Selim and J. L Fouss. 1989. Steady state flow to drains in terraced
multilayered anisotropic soils. TRANSACTIONS Am. Soc. Ag. Engineers. 32:1605-1613.
1990
1. Gaston, L.A. and H. M. Selim. 1990. Transport of exchangeable cations in an aggregated clay soil. Soil Sci. Soc. Am. J. 54: 31-38.
2. Amacher, M. C., H. M. Selim, and I. K. Iskandar. 1990. Kinetics of Mercuric chloride retention in soils. J. Environm. Qual. 19:382-388.
3. Gaston, L.A. and H. M. Selim. 1990. Prediction of cation mobility in montmorillonitic media based on exchange selectivities of montmorillonite. Soil Sci. Soc. Am. J. 54:1525-1530.
4. Selim, H. M., M. C. Amacher, N. Persaud, and R. S. Mansell. 1990. Retention and transport of phosphorus in soils; a multireaction approach. Summer Computer Simul. Conf. 596-603.
5. Iskandar, I. K, M. C. Amacher, and H. M. Selim. 1990. Describing the mobility and retention of Chromium in several soils. Transactions 14th Intern. Cong. Soil Sci. II:359-360. Kyoto, Japan.
6. Selim, H. M. and D. S. Burden. 1990. Spatial variability of soil moisture retention in a surface soil.Transactions 14th Intern. Cong. Soil Sci. I:237-238. Kyoto, Japan.
1991
1. Schulin, R., A. Papritz, H. Flühler, and H. M. Selim. 1991. Parameter estimation for simulating binary homovalent cation transport in aggregated soils at variable ionic strength. J. Contam.Hydrology 7:1-19.
2. Gaston, L.A. and H. M. Selim. 1991. Predicting cation mobility in kaolinite media based on exchange selectivities of kaolinite. Soil Sci. Soc. Am. J. 55:1255-1261.
3. Rogers, J. S., H. M. Selim, C.E. Carter, and J. L. Fouss. 1991. Variability of auger hole hydraulic conductivity values for a commerce silt loam. Trans. Am. Soc. Agric. Engrs. 34:867-882.
4. Amacher, M. C. and H. M. Selim. 1991. Mathematical models to evaluate cost effective clean-up of heavy metals in soils. Am. Chem. Soc. HAZMAT Proc. pp. 333-336.
5. Selim, H. M. 1991. Modeling solute transport and retention in soils. Soil Physical Conditions and Plant Growth, Japan, 62:78
6. Selim, H. M. 1991. Solute transport and retention in soils; a multicomponent approach. Summer Computer Simul. Conf. 596-603.
7. Selim, H. M. 1991. Book Review, Scaling in Soil Physics, by Hillel and Elrick. Soil Sci. 152:313-312.
1992
1. Schulin, R., H. Flühler, H. M. Selim, B. Seveuk, and P. J. Wierenga. 1992. Soil Moisture. Chapter 3 in Snow Cover and Measurements of Areal Assessment of Precipitation and Soil Moisture, B. Seveuk (ed.). WMO No. 749, pp.219-283, WMO, Geneva, Switzerland
2. Selim, H. M., B. Buchter, C. Hinz and L. Ma. 1992. Modeling the Transport and Retention of Cadmium in Soils: Mulltireaction and multicomponent approaches. Soil Sci. Soc. Am. J. 56:1004-1015.
3. Gaston, L. A., R. S. Mansell, and H. M. Selim. 1992. Predicting removal of soil cations and anions during acid infiltration: Model evaluation. Soil Sci. Soc. Am. J. 56:944-950.
Jardine, P. M., F. M. Dunnivant, H. M. Selim, and J. M. McCarthy. Comparison of Models for describing the transport of dissolved organic carbon in aquifer columns. Soil Sci. Soc. Am. J.56:393-401.
4. Southwick, L. M., G. H. Willis, and H. M. Selim, 1992. Leaching of Atrazine from Sugarcane in southern Louisiana. J. Agric. Food Chem. 40:1264-1268
5. Selim, H. M., 1992. Modeling solute retention and transport in soils. Proc. 22nd Ann. Workshop on Crop Simulation, Corpus Christi, TX (March 23-25), p. 5.
1993
1. Gaston, L.A., H. M. Selim, and P. M. Walthall. 1993. Predicting cation transport in Smectitic soils.Soil Sci. Soc. Am. J. 57:307-310.
2. Ma, L., L. M. Southwick, G. H. Willis, and H. M. Selim. 1993. Hysteretic characterestics of atrazine adsorption-desorption in a Sharkey soil. Weed Sci. 41:627-633.
3. Selim, H. M. , L. A. Gaston, and R. S. Mansell. 1993. Describing solute transport in soils based on exchange isotherms. Proc. Int. Conf on Physical Chemistry and Mass-Exchange Processes in Soils, Pushchino, Moscow, Russia, pp 141-146.
1994
1. Hinz, C. and H. M. Selim. 1994. Transport of Zn and Cd in Soils: Experimental Evidence and Modelling Approaches. Soil Sci. Soc. Am. J. 58:1316-1327.
2. Hinz, C. and H. M. Selim, and L. A. Gaston. 1994. Effect of sorption isotherm type on predictions of solute mobility in soil. Water Resource Research 30:3013-3021.
3. Ma, L. and H. M. Selim. 1994. Predicting atrazine adsorption-desorption in soils: A modified second order model. Water Resource Research 30:447-456.
4. Ma, L. and H. M. Selim. 1994. Predicting the Transport of Atrazine in Soils: Second-Order and Multireaction Approaches. Water Resource Research 30:3489-3498.
Amacher, M. C. and H. M. Selim. 1994. Mathematical models to evaluate retention and transport of chromium(VI) in soils. J. Ecol Modelling 74:205-230.
5. Ma, L. and H. M. Selim. 1994. Tortuosity, mean residence time and deformation of tritium breakthroughs from uniform soil columns. Soil Sci. Soc. Am. J. 58:1076-1085.
6. Kizza, P. N., L. A. Gaston, and H. M. Selim. 1994. Extrinsic Spatial Variability of Selected Macronutrients in a Sandy Soil. Geoderma 63:95-106.
7. Schmidhalter, U., H. M. Selim, and J. J. Oertli. 1994. Measuring and Modeling Root Water Uptake in a Silt Soil Affected by Groundwater. Soil Sci. 158:97-105.
8. Selim, H. M., and I. K. Iskandar. 1994. Sorption-desorption and transport of TNT and RDX in soils. CRREL Rept. 94-7(33 p.)
1995
1. Selim, H. M., and L. Ma. 1995. Transport of reactive solutes in soils: a modified two-region approach. Soil Sci. Soc. Am. J. 59:75-82.
2. Selim, H. M., Xue, S. K., and I. K. Iskandar. 1995.Transport of 2,4,6-Trinitrotoluene and
Hexahydro-1,3,5-Trinitro-1,3,5-Triazine in Soils. Soil Sci. 160:328-339.
3. Ma, L. and H. M. Selim. 1995. Transport of Nonreactive Solutes in Soils: A Two-Flow Domain Approach. Soil Sci. 159:224-234.
4. Ma, L., C. Hongprayoon, C. W. Lindau , and H. M. Selim. 1995. Transport of urea in flooded soil profiles as affected by water percolation rates and NBPT. Soil Sci. 159:101-110.
5. Southwick, L. M., G. H. Willis, D. C. Johnson, and H. M. Selim. 1995. Leaching of nitrate, atrazine and metribuzin to sugarcane in south Louisiana. J. Environm. Quality. 24:684-690.
6. Shouse, P.J., W.B. Russel, D.S. Burden, H.M. Selim, and M.Th. van Genuchten. 1995. Spatial variability of soil-water retention functions in a silt loam. Soil Sci. 159: 1-12.
7. Xue, S. K., I. K. Iskandar, and H.M. Selim. 1995.Adsorption-Desorption of 2,4,6-Trinitrotoluene and Hexahydro-1,3,5-Trinitro-1,3,5-Triazine in soils. Soil Sci. 160:317-327.
8. Xue, S. K. and H.M. Selim. 1995. Modeling Adsorption-Desorption Kinetics of Alachlor in Soils. J. Environm. Quality. 24:896-903.
9. Rogers, J. S., H. M. Selim, and J. L. Fouss. 1995. Comparison of drainage under steady rainfall versus falling water table conditions. Soil Sci. 160:391-399.
10. Johnson, D. C., H. M. Selim, L. Ma, L. M. Southwick, and G. H. Willis. 1995. Movement of atrazine and nitrate in sharkey clay soil: Evidence of preferential flow. Louisiana Agric. Exp. Stat. Bull. no. 846 (24p).
1996
1. Thabet, A. G. and H. M. Selim. 1996. Determination of cation selectivity coefficients of soils: A Thin disk flow method. Soil Sci. 161:405-410.
2. Granovsky, A.V., L. Ma, R. Ricaud, R.L. Bengtson, and H. M. Selim. 1996. Fate of
Azinphosmethyl in a sugarcane field: distributions in canopy, soil and runoff. J. Environmental Qual. 25:1210-1216.
3. Ma, L. and H. M. Selim. 1996. Solute transport in soils under conditions of variable flow
velocities. Water Resources Research 32: 3277-3283.
4. Reedy, O. C., P. M. Jardine, G. V. Wilson and H. M. Selim. 1996. Quantifying diffusive mass transfer on nonreactive solutes in undisturbed soil columns using flow interruption. Soil Sci. Soc.Am. J. 60:1376-1384.
5. Ma, L. and H. M. Selim. 1996. Atrazine retention and transport in soils. Reviews of Environmental Contamination and Toxicology 145:129-173.
1997
1. Ma, L. and H. M. Selim. 1997. Physical Nonequilibrium Modeling Approaches to Solute Transport in Soils. Advances in Agronomy 58:95-150.
2. Selim, H. M., R. L. Bengtson, L. M. Southwick, R. Ricaud, and H. P. Schexnayder, Jr. 1997.Fate of aplied ainphosmethyl as afected by mnagement pactices for sgarcane. Exp. Stat. Bulletin 863 (30p).
3. Xue, S. K., S. Chen and H.M. Selim. 1997. Modeling alachlor transport in saturated soils from no-till and conventional till systems. J. Environm. Quality. 26:1300-1307.
4. Ma, L. and H. M. Selim. 1997. Evaluation of nonequilibrium models for predicting atrazine transport in soils. Soil Sci. Soc. Am. J. 1299-1307.
5. Bengtson, R. L., H. M. Selim, and R. Ricaud. 1997. Surface runoff contamination as affected by sugarcane management practices. J. Am. Soc. Sugar Cane Technol. 17:84-94.
6. Selim, H. M. 1997. Soil pollution; processes and dynamics. Soil Sci. 162:953-954.
7. Zhu, H., L. Ma, and H. M. Selim. 1997. Application of a kinetic multireaction model for studying metolachlor adsorption in soil. Pedosphere 7:193-198.
8. Zhu, H., L. Ma, and H. M. Selim. 1997. Adsorption-desorption kinetics of metolachlor in a Sharkey soil. (pp. 80-88). Proc.Workshop on Transport of Contaminants in Vadose Zone and Prevention of Groundwater Pollution. March 18-26, 1997, Southest University Press,Nanjing, China.
9. Bengtson, R. L., H. M. Selim, and R. Ricaud. 1997. Water Quality from sugarcane on shallow ater table soils. Am. Soc. Agric. Engineering Paper no. 9-2225.
1998
1. Johnson, R. M., A. B. Pepperman. and H. M. Selim. 1998. Field mobility and persistence of alginate-controlled release formulations of Atrazine. Soil Science 163:46-52.
2. Wilson, G. V., H. M. Selim, M. E., and D. D. Tyler. 1998. Tillage and cover crop effects on saturated and unsaturated transport of floumeturon. Soil Sci. Soc. Am. J. 62:46-55.
3. Ma, L. and H. M. Selim. 1998. Coupling of retention approaches to physical nonequilibrium models. Chapter 4 In Physical Nonequilibrium in Soils: Modeling and Application. Selim, H. M. and L. Ma (eds), pp 83-115., Ann Arbor Press, Chelsea, MI (520p).
4. Bengston, R. L., H.M. Selim, and R. Ricaud. 1998. Water quality from sugarcane production on alluvial soils. Trans. ASAE 41:1331-1336.
5. Gobran, G.R., H. M. Selim, H. Hultberg and I. Anderson. 1998. Description of Sulfate
Adsorption-desorption and movement in a Swedish forest soil. Water, Air and Soil Pollution,108:411-424.
6. McGowen, S. L., R. M. Johnson, R. M., A. B. Pepperman, and H. M. Selim. 1998.Fate of metribuzin from alginate controlled release formulations in a sharkey Soil, 1: Desorption. Soil cience 164:529-534.
7. Henderson, G., O. M. Walthall, B. A. Wiltz, V. H. Rivera-Montroy, D. R. Ganaway, and H. M. Selim. 1998. Analysis of soil properties in relation to termiticide performance in Louisiana. Proc. at. Conf. Urban Entom. San Diego, CA (pp. 65-75).
8. Zhu, H., L. Ma, and H. M. Selim. 1998. Transport of nonreactive solute in soil and the
determination of mdel parameters. ACTA Pedologica Sinica 35:517-525.
9. Selim, H. M., S. L. McGowen,, R. M. Johnson and A. B. Pepperman. 1998. Fate of metribuzin from alginate controlled release formulations in a sharkey Soil, 2. Column Studies. Soil Science 164:535-543.
1999
1. Selim, H. M., L. Ma, and H. Zhu. 1999. Predicting Solute Transport in Soils: Second-Order Two-Site Models. Soil Sci. Soc. Amer. Journal 63: 768-777.
2. Ma, L., C. W. Lindau, C. Hongprayoon, W. Burhan, and B. C. Jang , W. H. Patrick, Jr. , and H.M. Selim. 1999. Modeling urea, ammonium and nitrate transport and transformations in flooded soil columns. Soil Sci. 163: .123-132.
3. Hinz, C. and H. M. Selim. 1999. Kinetics of Zn sorption-desorption using a thin disk flow method. Soil Sci. 163:92-100.
4. Han, F. X., W. L. Kingery, and H. M. Selim, 1999. Speciation and movement of selected heavy metals in long-term poultry waste amended soils, pp. 300-301 Proc. Fifth Int. Conf. Biogeochem. of Trace Elements, Vienna.
5. Kingery, W. L., S. F. Oppenheimer, F. X. Han, and H. M. Selim. 1999. Adsorption/desorption hysteresis of trace metals with soil components a dynamical systems approach. pp. 354-355, Proc. Fifth Int. Conf. Biogeochem. of Trace Elements, Vienna.
6. Wang, K. and H. M. Selim, 1999. Competitive Retention and Transport of Vanadium in soils, pp. 346-347. Proc. Fifth Int. Conf. Biogeochem. of Trace Elements, Vienna.
2000
1. Selim, H. M. and I. K. Iskandar. 2000. Retention kinetics of heavy metals in soils: Modeling approaches. Chapter 13, pp 155-173, In Contaminated Hydrology Modeling, S. A. Grant and I.K. Iskandar, (eds), CRC Press, Boca Raton, FL. (328p)
2. Zhu, H. and H. M. Selim. 2000. Hysteretic behavior of metolachlor adsorption-desorption in soils. Soil Sci. 165:632-645.
3. Han, F. X, W. L. Kingery, H. M. Selim, and P. D. Gerard. 2000. Accumulation heavy metals in a long-term poultry waste amended soil. Soil Sci. 165:260-268.
4. Barnett, M. O., P. M. Jardine, S. C. Brooks, and H. M. Selim. 2000. Adsorption and transport of uranium (VI) in subsurface media. Soil Sci. Soc. Amer. Journal 64:908-917.
5. Selim, H. M., R. L. Bengtson, H. Zhu, and R. Ricaud. 2000. Effect of losses of atrazine,
metribuzin, and nutrients as affected by management practices for sugarcane. LA Agric. Exp.Stat. Bull. no. 875 (42p).
2001
1. Selim, H. M. and L. Ma. 2001. Modeling nonlinear kinetic behavior of copper adsorptiondesorption in soil. Soil Sci. Soc. Am. Spec. Publ. 56:189-212.
2. Zhou, L. and H. M.Selim. 2001. Solute transport in layered soils: nonlinear and kinetic reactivity. Soil Sci. Soc. Am. J. 65:1056-1064.
3. Zhang, W., E. P. Webster, and H. M. Selim. 2001. Effect of soil moisture on efficacy of
imazethapyr in greenhouse. Weed Tech. 15:355-359.
4. Han, F. X, W. L. Kingery, and H. M. Selim. 2001. Accumulation, redistribution, transport and bioavailability of heavy metals waste-amended soils. Chapter 8 (pp. 145-173) In Trace Elements in Soil, I. K. Iskandar and M. B. Kirkham (eds),. CRC Press, Boca Raton, FL.
5. Bengtson, R. L. and H. M. Selim. 2001. Herbicide losses in surface runoff. Louisiana Agric.44:34-35.
2002
1. Zhou, L. and H. M. Selim. 2002. A conceptual fractal model for describing time-dependent dispersivity. Soil Sci. 167: 173-183.
2. Selim, L. Zhou , and S. K. Xue. 2002. Alachlor Transport During Transient Water Flow in Unsaturated Soils. Soil Sci. Soc. Am. J. 65: 1773-1783.
3. Zeng, H., V. Alarcon, W. L. Kingery, H. M. Selim, and J. Zhu. 2001. A web based simulation system for transport and retention of dissolved contaminants in soil. Computer and Electr. Agric. 33:105-120.
4. Zhu, L. and H. M. Selim. 2002. Retention and Mobility of Deltamethrin in Soils: Adsorption-Desorption. Soil Sci. 168:513-523.
5. Selim, H. M. and L. Zhu. 2002. Retention and Mobility of Deltamethrin in Soils: Transport. Soil Sci. 168:559-568.
2003
1. Zhou, L. and H. M. Selim. 2003. Application of the Fractional Advection-Dispersion Equation in Porous Media. Soil Sci. Soc. Am. J. 67:1079-1084.
2. Zhou, L. and H. M. Selim. 2003. Scale Dependent Dispersion in Soils: An Overview. Adv. Agron. 80:223-263.
3. Alarcon, V., H. Zeng, W. Kingery, H. M. Selim, and J. Zhu. 2003. A study of three-dimensional preferential flow using web-based simulation system. Kumar et al. (eds): ICCSA- LNCS 2667, pp539-548, Springer-Verlag, Berlin.
4. Selim, H. M. 2003. Retention and runoff losses of atrazine and metribuzin in soil. Journal of Environmental Quality 32:1058-1071.
5. Selim, H. M., L. Zhou, and H. Zhu. 2003. Herbicide retention as affected by sugarcane mulch residue. Journal of Environmental Quality 32:1445-1454.
2004
1. Selim, H. M. 2004. Kinetic Retention of Atrazine and Metribuzin in Soil. Soil Science 169-25-34.
2. Selim, H. M., G. R. Gobran, X. Guan, and N. Clarke. 2004. Mobility of Sulfate in Forest Soils:Kinetic Modeling. Journal of Environmental Quality 33:488-495.
3. Wilson, G. V., F. E. Rhoton, and H.M. Selim. 2004. Modeling the Impact of Ferrihydrite on Adsorption-Desorption of Soil Phosphorus. Soil Science 169: 271-281.
4. Han, F. X., W. L. Kingery, H. M. Selim, P. G. Gerard, M. S. Cox, and J. L. Oldham. 2004.Arsenic solubility and distribution in poultry waste and long term amended soil. Sci. Total Environm. 320:51-61.
5. Amacher, M. C. and H. M. Selim. 2004. Modeling reactive metal transport in soils.), In Solid Waste: Assessment, Monitoring, and Remediation, I. Twardowska, H..E. Allen , A.A.F. Kettrup and W.J. Lacy (eds). Chapter 5 (pp 619-632) Elsevier Publishers.
6. Selim, H. M., M. R. Lindsey, B. J. Naquin and B. Venuto. 2004. Reducing nonpoint-source discharge from sugarcane and pasture fields in Bayou Wikoff watershed. Louisiana Agriculture, Spring issue (pp. 11-12).
7. Selim, H. M., b. J. Naquin, R. L. Bengtson, H. Zhu, James L. Griffin, and L. Zhou. 2004.
Herbicide retention and runoff losses as affected by sugarcane mulch residue. LA Agric. Exp. Stat. Bull. no. 883 (48p).
2005
1. Ma, L. and H. M. Selim. 2005. Predicting pesticide transport in mulch amended soils: A two compartment model. Soil Sci. Soc. Am. J. 69: 318-327.
2. Selim, H. M. and H. Zhu. 2005. Atrazine sorption�desorption hysteresis by sugarcane mulch residue. Journal of Environmental Quality 34: 325-335.
3. Zhang , H and H. M. Selim . 2005. Modeling competitive transport of arsenate and phosphate in soils. Proc. 8th Internationl Conference. Biogeochem. Trace Elements (ICOBTE), April 3-7, 2005, Adelaide, Australia (pp. 240-241).
4. Selim, H. M., et al. (editors). 2005. ICOBTE � 8th International Conference on the
Biogeochemistry of Trace Elements. April 3-7, 2005, Adelaide, Australia (p. 876), CSIRO.
5. Zhang, H. and H.M. Selim. 2005. Kinetics of arsenate adsorption-desorption in soils. Environ.Sci. Techn. 39:6101-6108
Herbicide Retention in Soil: Soil Conservation/Runoff
H. M. Selim
Dept. of Agronomy and Environmental Management
Louisiana State University
Baton Rouge, LA 70803
ABSTRACT
Best management practices are used by agricultural producers to control or reduce the transport and generation of contaminants to the water resources of the state, ultimately increasing the quality of surface and ground waters. One such practice is residue management used during sugarcane production. The focus of this study was the impact that sugarcane residue may have on the retention and release of the two herbicides atrazine and metribuzin. Adsorption-desorption and transport behavior of herbicides are important processes that influence the amount of herbicide retained by the soil or crop residue and affect susceptibility to runoff or movement within the soil profile. Kinetic batch experiments were used to study the adsorption-desorption behavior of atrazine and metribuzin in sugarcane mulch residue and two surface soils. Atrazine retention was consistently stronger than metribuzin for both sugarcane residue and surface soils. To describe the retention of atrazine and metribuzin by the residue as it aged and across growing seasons, only one value (Kd = herbicide retention distribution coefficient) was needed for each herbicide, and these values were an order of magnitude greater than those determined for surface soils. Miscible displacement experiments under steady flow conditions were also carried out to examine the mobility of the metribuzin within soils. In addition, field studies quantified the decay of sugarcane residue in the field following combine harvest. Amounts of residue cover varied with the growing season and variety of sugarcane. Half-lives of 126 to 171 days were determined for sugarcane residue as it remained in the field. With residue age, mass decreased leaving greater percentages of more recalcitrant residue such as lignin. Fiber analysis identified these changes, and there were no obvious relationships between herbicide retention distribution coefficients and percentage of lignin on a mass basis.
Reducing Runoff and Sediments in Bayou Wikoff Sub-Watershed
H. M. Selim
Dept. of Agronomy and Environmental Management
Louisiana State University
Baton Rouge, LA 70803
This study was funded in part by the State of Louisiana Department of Environmental Quality (LDEQ) in order to quantify measures for implementation of best management practices (BMPs) that reduce in-stream total maximum daily loads (TMDLs) into Bayou Wikoff sub-watershed. Bayou Wikoff sub-watershed is located in St. Landry and Acadia Parishes and comprises a total area of 4.70 square miles and elevation between 114 ft and 177 ft. The sub-watershed is representative of the type of soil, land use and land morphology that exists within the upper portion of the Bayou Plaquemine Brule watershed. The reach of Bayou Wikoff is approximately 4.9 miles in length and the flow is from northeast to southwest.
The sites selected for the study included a pristine site, two pastures sites, and two sugarcane sites. The so-called pristine site is approximately 5-acres of a minimum input tree nursery and serves as a “control” area. A 14-acre tract was selected as standard practice of sugarcane burning prior to harvest and an adjacent area was selected for implementation of a mulch treatment or “no-burn” BMP. For both treatments; burn and no-burn, a combine harvester was used. The first pasture site was an 11-acre site which is best regarded as minimum input and involved continuous grazing at high stocking rates, supplemental feeding and minimum tillage. The second site was a 10-acre corrugated pasture consisting of a deferred rotational grazing system wherein duration, intensity, and frequency of grazing was managed to enhance nutrient cycling. This management system facilitates uniform manure distribution and rate of decomposition, restricts fertilizer inputs, minimizes soil compaction, and maintains vegetative cover. Forages in these treatment areas consisted of perennial summer grasses and winter over seeded ryegrass. All sites were equipped with ISCO auto-water samplers and solar panels. Water flow was measured using H-type flumes and rain gauges were installed at several of the sites. Effluent sampling was triggered by rainfall amounts that produced runoff events.
Based on two years of experimental data, an average reduction of the concentration of the total solids in the effluent of 40% was achieved in the rotational grazing system rather than the continuous high stocking rate system. The DEQ goal of 30% reduction in TMDL should be achievable if rotational grazing, with appropriate stocking rates and fertility management, is adopted. Furthermore, based on data from the pristine site and the pasture sites, there is strong evidence that the presence of soil surface with grass cover throughout the year minimized sediment losses and erosion. For sugarcane, we found strong evidence that reduction in total and suspended solids from the edge of field of the fallow and first year sugarcane would significantly reduce in-stream concentrations and thus achieve TMDL goals. Finally, the use of AnnAGNPS model to predict suspended solids, P and N effluent concentrations at edge of field from our pristine site is recommended provided that the appropriate parameter for the curve number (SCS-CN) is selected. The model was least successful in describing P concentrations in the effluent.