Search Results - "PAPANICOLAOU, Athanasios N"

Spatial variability of saturated hydraulic conductivity at the hillslope scale: Understanding the role of land management and erosional effect by Papanicolaou, Athanasios (Thanos) N., Elhakeem, Mohamed, Wilson, Christopher G., Lee Burras, C., West, Larry T., Lin, Hangsheng (Henry), Clark, Ben, Oneal, Brad E.

“…In this study, detailed field experiments were conducted at three hillslopes in southeast Iowa with different agricultural management practices, namely…”
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Secondary current effects on cohesive river bank erosion by Papanicolaou, Athanasios N., Elhakeem, Mohamed, Hilldale, Robert

“…The emphasis of this research was placed on the development of a methodology that allows (1) an adequate representation of the distribution of the near‐bank…”
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Effects of a fully submerged boulder within a boulder array on the mean and turbulent flow fields: Implications to bedload transport by Papanicolaou, Athanasios N., Kramer, Casey M., Tsakiris, Achilleas G., Stoesser, Thorsten, Bomminayuni, Sandeep, Chen, Zhuo

“…The objective of this coupled experimental and numerical study is to provide insight into the mean and turbulent flow fields within an array of fully…”
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Flow characteristics around a wall-mounted spherical obstacle in a thin boundary layer by Hajimirzaie, Seyed M., Tsakiris, Achilleas G., Buchholz, James H. J., Papanicolaou, Athanasios N.

“…The mean wake structures and turbulent flow fields of a wall-mounted spherical obstacle placed in a thin laminar boundary layer, of thickness 14 % of the…”
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Assessing the Effectiveness of Alternative Tile Intakes on Agricultural Hillslopes by Wilson, Christopher G., Streeter, Matthew T., Ettema, William D., Abban, Benjamin K. B., Gonzalez, Adrian, Schilling, Keith E., Papanicolaou, Athanasios N.

“…Existing surface inlets behind terraces and water and sediment control basins (WASCoBs) were replaced with alternative tile intakes (ATIs) in agricultural…”
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Sediment Transport Modeling Review—Current and Future Developments by (Thanos) Papanicolaou, Athanasios N, Elhakeem, Mohamed, Krallis, George, Prakash, Shwet, Edinger, John

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Quantifying the time‐specific kinetic energy of simulated rainfall using a dynamic rain gauge system by Wacha, Kenneth M., Huang, Chi‐hua, O'Brien, Peter L., Papanicolaou, Athanasios N., Hatfield, Jerry L.

“…Raindrop impact derives from the kinetic energy of falling raindrops. Determining the kinetic energy of rainfall requires the size distribution and terminal…”
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Turbulence in a Gravel-Bed Stream with an Array of Large Gravel Obstacles by Sarkar, Sankar, Papanicolaou, Athanasios N. (Thanos), Dey, Subhasish

“…AbstractThis experimental and analytical study investigates the double-averaged (DA) turbulent flow characteristics within an array of large gravel obstacles…”
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Semi-theoretical model for mean sediment resting time of spherical particles: the role of hydrodynamic impulses and sphere size nonuniformity by Wyssmann, Micah A., Papanicolaou, Athanasios N., Kyriakopoulos, Theodoros

“…Prediction of bedload rates in gravel-bed rivers at low-to-moderate flow conditions, where bedload movement is intermittent, remains a challenging problem…”
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Estimation of the Runoff Curve Number via Direct Rainfall Simulator Measurements in the State of Iowa, USA by Elhakeem, Mohamed, Papanicolaou, Athanasios N

“…This study was the first to provide detailed methodological steps to estimate in-situ runoff curve number (CN) for selected agricultural fields in the State of…”
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The LTAR Cropland Common Experiment at Upper Mississippi River Basin–Ames by Kovar, John L., Papanicolaou, Athanasios N., Busch, Dennis L., Chatterjee, Amit, Cole, Kevin J., Dalzell, Brent J., Emmett, Bryan D., Johnson, Jane M. F., Malone, Robert W., Morrow, Amy J., Nowatzke, Laurie W., O'Brien, Peter L., Prueger, John H., Rogovska, Natalia, Ruis, Sabrina J., Todey, Dennis P., Wacha, Ken M.

“…Agricultural systems evolve from the interactions of climate, crops, soils, management practices (e.g., tillage, cover crops, nutrient management), and…”
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The LTAR Croplands Common Experiment at Upper Mississippi River Basin-Ames by Kovar, John L, Papanicolaou, Athanasios N, Busch, Dennis L, Chatterjee, Amit, Cole, Kevin J, Dalzell, Brent J, Emmett, Bryan D, Johnson, Jane M F, Malone, Robert W, Morrow, Amy J, Nowatzke, Laurie W, O'Brien, Peter L, Prueger, John H, Rogovska, Natalia, Ruis, Sabrina J, Todey, Dennis P, Wacha, Ken M

“…Agricultural systems evolve from the interactions of climate, crops, soils, management practices (e.g., tillage, cover crops, nutrient management), and…”
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Evaluation of a gravel transport sensor for bed load measurements in natural flows by PAPANICOLAOU, Athanasios N. (Thanos), ELHAKEEM, Mohamed, KNAPP, Doug

“…A recent acoustic instrument （Gravel Transport Sensor, GTS） was tested for predicting sediment transport rate （bed load rate） in gravel bed streams. The GTS…”
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Flow Resistance Interactions on Hillslopes With Heterogeneous Attributes: Effects on Runoff Hydrograph Characteristics by Papanicolaou, Athanasios N., Abban, Benjamin K. B., Dermisis, Dimitrios C., Giannopoulos, Christos P., Flanagan, Dennis C., Frankenberger, James R., Wacha, Kenneth M.

“…An improved modeling framework for capturing the effects of space and time‐variant resistance to overland flow is developed for intensively managed landscapes…”
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Groundwater monitoring at the watershed scale: An evaluation of recharge and nonpoint source pollutant loading in the Clear Creek Watershed, Iowa by Schilling, Keith E., Streeter, Matthew T., Bettis, E. Arthur, Wilson, Christopher G., Papanicolaou, Athanasios N.

“…Determining the groundwater contribution of nonpoint source pollution at a watershed scale is a challenging issue. In this study, we utilized a top‐down…”
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The Use of Carbon and Nitrogen Isotopes to Study Watershed Erosion Processes1 by Fox, James F., Papanicolaou, Athanasios N.

“…:  Tracer studies are needed to better understand watershed soil erosion and calibrate watershed erosion models. For the first time, stable nitrogen and carbon…”
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Application of the spatial distribution of nitrogen stable isotopes for sediment tracing at the watershed scale by Fox, James F., Papanicolaou, Athanasios N.

“…Sediment tracing technology relies on the use of natural biogeochemical tracers to identify sediment sources in a watershed. This improves sediment tracer…”
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Use of Carbon and Nitrogen Isotopes to Study Watershed Erosion Processes by Fox, J.F, Papanicolaou, A.N

“…Tracer studies are needed to better understand watershed soil erosion and calibrate watershed erosion models. For the first time, stable nitrogen and carbon…”
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ADV Measurements around a Cluster Microform in a Shallow Mountain Stream by Strom, Kyle B, Papanicolaou, Athanasios N

“…A field study was conducted to examine the turbulent properties of the flow around a naturally formed cluster bedform. This was carried out on a mountain river…”
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Comparing spatial and temporal variability of the system Water Use Efficiency in a Lower Mississippi River watershed by Wilson, Christopher G., Papanicolaou, Athanasios N., Abban, Benjamin K.B., Freudenberg, Violeta B., Ghaneeizad, Seyed M., Giannopoulos, Christos P., Hilafu, Hilafu T.

“…Study Region: The Obion River watershed, Tennessee, is representative of Lower Mississippi River watersheds with loess soils and a fragipan layer. Study Focus:…”
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