Browsing by Author "Younos, Tamim M."
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- 2007 NSF REU Proceedings of Research: Research Opportunities in Interdisciplinary Watershed Sciences and Engineering(Virginia Water Resources Research Center, 2008)
- 2008 NSF REU Proceedings of Research: Research Opportunities in Interdisciplinary Watershed Sciences and Engineering(Virginia Water Resources Research Center, 2008)
- 2009 NSF REU Proceedings of Research: Research Opportunities in Interdisciplinary Watershed Sciences and Engineering(Virginia Water Resources Research Center, 2009)
- Agricultural best management practices and water quality in the Bush River watershed, VirginiaSmolen, M. D.; Yagow, Eugene R.; Younos, Tamim M. (Virginia Agricultural Experiment Station, 1984-07)This project was developed as part of the implementation phase of the PL 92-500 Section 208 Program for control of nonpoint pollution from agricultural sources. The project objective was to determine the effect of Best Management Practices on sediment and nutrient yields in agricultural watersheds. The research consisted of field monitoring at two small watershed sites in the Bush River basin, near Farmville, Virginia. One watershed used Best Management Practices (BMP Watershed) consisting of contour strip cropping in combination with crop rotation and sod waterways. The second watershed, with conventional management ( CONV Watershed), was approximately half agricultural and half forested. Concurrent with the small watershed monitoring study, a weekly sampling program was maintained to evaluate the ambient water quality on the main tributary system of the Bush River. The results of the study include the first field-based quantification of sediment yield and delivery ratios in this area. Although the results of this study are not conclusive, the agricultural watershed with recommended Best Management Practices tended to produce reduced levels of gross erosion, runoff, and sediment and nutrient yields. Sediment delivery ratios were compared with several alternative estimation techniques. Particle size distributions, nutrient enrichment ratios and sediment delivery ratios estimated in this study may be useful in computing nonpoint pollution effects of agricultural land use in the Southeastern Piedmont of the United States. The ambient data developed in this study may be useful in the future to estimate the effect of a planned PL-566 Conservation Plan that is being implemented on the Bush River watershed.
- Analysis of Nutrient-Response Characteristics to Support Criteria Development for Constructed ReservoirsWarren, Meredith Pavlick; Younos, Tamim M. (Virginia Water Resources Research Center, 2008-05)
- Analysis of Sinkhole Susceptibility and Karst Distribution in the Northern Shenandoah Valley, Virginia: Implications for Low Impact Development (LID) Site Suitability ModelsHyland, Sara Elizabeth; Kennedy, Lisa M.; Younos, Tamim M.; Parson, Shane (Virginia Water Resources Research Center, 2006-08)
- Analysis of Water and Energy Conservation of Rainwater Capture System on a Single Family HomeGrady, Caitlin; Younos, Tamim M. (Virginia Water Resources Research Center, 2008-09)
- Bacteria Total Maximum Daily Load Issues: Report of the Bacteria TMDL Subcommittee of the Water Quality Academic Advisory CommitteeDillaha, Theo A. III; Hershner, Carl H.; Kator, Howard I.; Mostaghimi, Saied; Shabman, Leonard A.; Smith, Eric P.; Younos, Tamim M.; Zipper, Carl E. (Virginia Water Resources Research Center, 2002-10)
- Batie Springs: Assessment and Restoration, final reportFrago, Cathia H., 1967-; Younos, Tamim M.; Mendez, Aida; Brown, Terri (Virginia Water Resources Research Center, 1998-04-30)
- Community-Based Sustainable Development PlanningAdams, Erica; Younos, Tamim M. (Virginia Water Resources Research Center, 2008-10)
- December 2006 Report Of The Academic Advisory Committee To Virginia Department Of Environmental Quality: Freshwater Nutrient Criteria For Rivers And StreamsZipper, Carl E.; Yagow, Eugene R.; Walker, Jane L.; Smith, Eric P.; Shabman, Leonard A.; Smock, Leonard A.; Hershner, Carl H.; Younos, Tamim M.; Benfield, Ernest F.; Bukaveckas, Paul A.; Garman, Greg C.; Kator, Howard I.; Lung, Wu-Seng; Stephenson, Stephen Kurt (Virginia Water Resources Research Center, 2007-01-10)This report reviews activities conducted by the Academic Advisory Committee to the Virginia Department of Environmental Quality (DEQ) between July and December 2006. Activities were conducted for the purpose of developing recommendations for DEQ regarding nutrient criteria for freshwater rivers and streams.
- December 2006 Report of the Academic Advisory Committee to Virginia Department of Environmental Quality: Freshwater Nutrient Criteria for Rivers and StreamsZipper, Carl E.; Yagow, Eugene R.; Walker, Jane L.; Smith, Eric P.; Shabman, Leonard A.; Smock, Leonard A.; Hershner, Carl H.; Younos, Tamim M.; Benfield, Ernest F.; Bukaveckas, Paul A.; Garman, Greg C.; Kator, Howard I.; Lung, Wu-Seng; Stephenson, Stephen Kurt (Virginia Water Resources Research Center, 2007-01-10)This report reviews activities conducted by the Academic Advisory Committee to the Virginia Department of Environmental Quality (DEQ) between July and December 2006. Activities were conducted for the purpose of developing recommendations for DEQ regarding nutrient criteria for freshwater rivers and streams.
- Economic Analysis of Water Hauling for Southwest Virginia CommunitiesReaves, Dixie Watts; Younos, Tamim M.; Ramsey, Kelly A. (Virginia Water Resources Research Center, 1998-11)
- Effects of tillage system, crop residue level, and fertilizer application technique on losses of phosphorus and pesticides from agricultural landsMostaghimi, Saied; Shanholtz, Vernon O.; Dillaha, Theo A. III; Kenimer, Ann Lee, 1964-; Ross, Burton Blake; Younos, Tamim M. (Virginia Water Resources Research Center, Virginia Polytechnic Institute and State University, 1987-09)A rainfall simulator was used to study the effectiveness of three best management practices - no-till, residue level and fertilizer application technique - for reducing sediment, phosphorus, and pesticide losses from agricultural lands. Simulated rainfall was applied to 12 experimental field plots, each 0.01 ha in size. The plots were divided into conventional and no-till systems. During phase I, the effectiveness of two fertilizer application methods - subsurface injection and surface application - were investigated for the two tillage systems. In phase II, three crop residue levels - 0, 750, and 1500 kg/ha - were studied within each tillage system. Granular fertilizer was applied at the rate 46 kg/ha. Atrazine and 2,4-D were applied at the rates of 2.24 and 0.56 kg/ha active ingredient, respectively. Fertilizer and herbicides were applied 24 to 48 hours before the start of rain simulation. Water samples were collected from the base of each plot and analyzed for sediment, nutrient, and pesticide content. No-till was found to be very effective in reducing runoff and sediment losses. No-till with high residue level produced the greatest reductions in runoff and sediment losses, and the highest reduction for both runoff and sediment occurred with no-till and 1500 kg/ha crop residue level. No-till reduced sediment loss by 98% and total runoff volume by 92%. The injection fertilization method reduced 0-P losses by 39% for no-till and 35% for conventional tillage. Reductions in T-P losses due to no-till practice were 89% and 91 % for surface and injection fertilizer application methods, respectively, compared to the conventional system. Averaged across all fertilizer treatments, an equivalent of 0.9% and 8.9% of the total-P fertilizer applied to the plots was lost from no-till and conventional tillage plots, respectively. Concentrations of atrazine and 2,4-0 in runoff and sediment were greater from the no-till plots than from the conventional plots, but total losses were less. Water was the major carrier for both herbicides, although the concentration of 2,4-D in sediment was higher than that of water. Averaged over all plots, the atrazine losses were 2.9% of the applied amount for conventional tillage and 0.3% for no-till. The corresponding values for 2,4-0 were 0.3% and 0.02%.
- Evaluation of rooftop rainfall collection-cistern storage systems in Southwest VirginiaYounos, Tamim M.; Bohdan, Rebecca; Anderson, Eric; Ramsey, Kelly A.; Cook, Nicole; Ross, Burton Blake; Dillaha, Theo A. III (Virginia Water Resources Research Center, 1998)
- Feasibility of Rainwater Harvesting BMP for Stormwater ManagementGowland, Dana; Younos, Tamim M. (Virginia Water Resources Research Center, 2008-05)
- The Feasibility of using Desalinations to Supplement Drinking Water Supplies in Eastern VirginiaYounos, Tamim M. (Virginia Water Resources Research Center, 2004-06)
- A Feasibility Study of Rainfall Harvesting and Small Surface-Catchment System for Drinking Water Supplies Case Study: Trammel Gap Community, Dickenson County, VirginiaYounos, Tamim M.; Frago, Cathia H., 1967-; Ramsey, Kelly A.; Fretwell, S. L.; Blair, G. D. (Virginia Water Resources Research Center, 1998-04)
- The finite element storm hydrograph model user's guideSmolen, M. D.; Ross, Burton Blake; Younos, Tamim M.; Sydor, W. J. (Virginia Agricultural Experiment Station, 1984)
- Fiscal Years 1999 & 2000 Report of the Water Quality Academic Advisory CommitteeHershner, Carl H.; Shabman, Leonard A.; Dillaha, Theo A. III; Kator, Howard I.; Mostaghimi, Saied; Smith, Eric P.; Smock, Leonard A.; Younos, Tamim M.; Yu, Shaw L.; Zipper, Carl E. (Virginia Water Resources Research Center, 2000-05)
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