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Daniel G Wren
Research Civil Engineer


Publications (Clicking on the reprint icon Reprint Icon will take you to the publication reprint.)
Sediment transport and bed topography for realistic unsteady flow hydrographs of varying length in a laboratory flume - (Peer Reviewed Journal)
Uncertainty for the ISSDOTv2 bed-load measurement method - (Peer Reviewed Journal)
Mcalpin, T.O., Wren, D.G., Jones, K.E., Abraham, D.D., Kuhnle, R.A., Willson, C.S. 2023. Uncertainty for the ISSDOTv2 bed-load measurement method. Journal of Hydraulic Engineering. 149 (9): 04023036. https://doi.org/10.1061/jhend8.hyeng-13505.
Development of a two-dimensional hybrid sediment transport model - (Peer Reviewed Journal)
Zhang, Y., Al-Hamdan, M., Wren, D.G. 2023. Development of a two-dimensional hybrid sediment transport model. Applied Sciences. 2023. 13. 1940. https://doi.org/10.3390/.
Sediment transport and bed topography for unsteady hydrograph flows in a laboratory flume - (Abstract Only)
Wren, D.G., Kuhnle, R.A., Langendoen, E.J., Mcalpin, T. 2023. Sediment transport and bed topography for unsteady hydrograph flows in a laboratory flume. Meeting Proceedings. Proceedings.
ISSDOTv2 methodology, uncertainty, and applications for measuring bed-load transport - (Proceedings)
Mcalpin, T., Wren, D.G., Jones, K., Kuhnle, R.A., Abraham, D.D., Willson, C.S. 2023. ISSDOTv2 methodology, uncertainty, and applications for measuring bed-load transport. Joint Federal Interagency Sedimentation and Hydrologic Modeling. In proceedings.
Investigating the effects of diel patterns of attenuation for an ultrasonic suspended-sediment measurement system - (Abstract Only)
Carpenter, W., Goodwiller, B., Wren, D.G., Taylor, J.M. 2023. Investigating the effects of diel patterns of attenuation for an ultrasonic suspended-sediment measurement system. Joint Federal Interagency Sedimentation and Hydrologic Modeling. In proceedings.
Bed topography for the Mississippi River at Vicksburg, Mississippi, for selected flows 2011-2016 - (Peer Reviewed Journal)
Wren, D.G., Mcalpin, T.O., Smith Iv, J.E., Jones, K.E., Kuhnle, R.A., Abraham, D.A. 2022. Bed topography for the Mississippi River at Vicksburg, Mississippi, for selected flows 2011-2016. Journal of Hydraulic Engineering. 149(2):04022039-1:04022039-12 https://ascelibrary.org/doi/10.1061/JHEND8.HYENG-13295.
Field testing a high-frequency acoustic attenuation system for measuring fine suspended sediments and algal movements - (Peer Reviewed Journal)
Carpenter, B., Goodwiller, B., Wren, D.G., Taylor, J.M., Aubuchon, J., Brown, J., Posner, A. 2022. Field testing a high-frequency acoustic attenuation system for measuring fine suspended sediments and algal movements. Applied Acoustics. 198: 2022. 108980. https://doi.org/10.1016/j.apacoust.2022.108980.
Irrigation water conservation practices in the Mississippi River alluvial plain: On-farm reservoirs - (Abstract Only)
Ozeren, Y., Wren, D.G., Rossell, W. 2022. Irrigation water conservation practices in the Mississippi River alluvial plain: On-farm reservoirs. International Conference on Hydroscience and Engineering (ICHE). Izmir, Turkey, May 26-27, 2022.
Assessment of embankment damage due to wave impact in an on-farm reservoir - (Abstract Only)
Ozeren, Y., Wren, D.G., Rossell, W. 2022. Assessment of Embankment Damage due to Wave Impact in an On-Farm Reservoir. Mississippi Water Resources Research Conference Proceedings. 2022.
Testing of a full-scale floating wave barrier for reducing wave erosion in a working irrigation reservoir - (Abstract Only)
Rosell, W., Ozeren, Y., Wren, D.G. 2022. Testing of a full-scale floating wave barrier for reducing wave erosion in a working irrigation reservoir. Mississippi Water Resources Research Conference Proceedings. 2022.
Detailed bed topography and sediment load measurements for two stepdown flows in a laboratory flume - (Peer Reviewed Journal)
Wren, D.G., Kuhnle, R.A., Mcalpin, T.O., Abraham, D.D., Jones, K.E. 2021. Detailed bed topography and sediment load measurements for two stepdown flows in a laboratory flume. Journal of Hydraulic Engineering. 37(3): 287-298. https://doi.org/10.1016/j.ijsrc.2021.11.002. 2022.
Comparative study of beach erosion and shoreline recession using XBeach in non-hydrostatic mode - (Abstract Only)
Rossell, W., Ozeren, Y., Wren, D.G. 2021. Comparative study of beach erosion and shoreline recession using XBeach in non-hydrostatic mode. American Geophysical Union. 2021.
Bed-load validation for ISSDOTv2 - (Peer Reviewed Journal)
Mcalpin, T.O., Wren, D.G., Jones, K.E., Abraham, D.D., Kuhnle, R.A. 2022. Bed-load validation for ISSDOTv2. Journal of Hydraulic Engineering. 148(3). https://doi.org/10.1061/(ASCE)HY.1943-7900.0001968.
Experimental and numerical investigation of reservoir embankment recession - (Abstract Only)
Ozeren, Y., Rossell, W., Wren, D.G. 2022. Experimental and numerical investigation of reservoir embankment recession. American Society of Civil Engineers Water Resources Conference Proceedings. Atlanta, Georgia. June 5-8, 2022.
Effect of increasing antecedent flows on equilibrium bed load transport rates in a laboratory channel with a sand and gravel bed channel - (Peer Reviewed Journal)
Kuhnle, R.A., Wren, D.G., Langendoen, E.J. 2021. Effect of increasing antecedent flows on equilibrium bed load transport rates in a laboratory channel with a sand and gravel bed channel. Journal of Hydraulic Engineering. 147(10).040210838.
Experimental investigation of a moored, circular pipe breakwater - (Peer Reviewed Journal)
Rossell, W., Ozeren, Y., Wren, D.G. 2021. Experimental investigation of a moored, circular pipe breakwater. Journal of Waterway, Port, Coastal and Ocean Engineering. 147(5):04021019.
Changes in sediment transport and bed topography in response to step-up flows in a laboratory flume - (Peer Reviewed Journal)
Wren, D.G., Langendoen, E.J., Kuhnle, R.A. 2021. Changes in sediment transport and bed topography in response to step-up flows in a laboratory flume. Journal of Hydraulic Engineering. 147(4):5. https://doi.org/10.1061/(ASCE)HY.1943-7900.0001874.
Wave-induced erosion of soil embankment in in laboratory flume - (Peer Reviewed Journal)
Ozeren, Y., Wren, D.G., Reba, M.L. 2021. Wave-induced erosion of soil embankment in in laboratory flume. Journal of Hydraulic Engineering. 147:04021011.
Structural changes of a mobile gravel bed surface for increasing flow intensity - (Peer Reviewed Journal)
Kuhnle, R.A., Wren, D.G., Langendoen, E.J. 2019. Structural changes of a mobile gravel bed surface for increasing flow intensity. Journal of Hydraulic Engineering. 146(2): 04019065. 10.1061/(ASCE)HY.1943-7900.0001699.
Sediment transport and bed-form characteristics for a range of step-down flows - (Peer Reviewed Journal)
Wren, D.G., Kuhnle, R.A., Langendoen, E.J. 2019. Sediment transport and bed-form characteristics for a range of step-down flows. Journal of Hydraulic Engineering. 146(2): 04019060. DOI: 10.1061/(ASCE)HY.1943-7900.0001695.
Development and calibration of an underwater acoustic data collection system for monitoring coardse bedload transport - (Peer Reviewed Journal)
Goodwiller, B.J., Wren, D.G., Surbeck, C. 2019. Development and calibration of an underwater acoustic data collection system for monitoring coardse bedload transport. Applied Acoustics. 155 (2019):383-390. https://doi.org/10.1016/j.apacoust.2019.06.019.
Short term sediment accumulation rates reveal seasonal time lags between sediment delivery and deposition in an oxbow lake Reprint Icon - (Peer Reviewed Journal)
Wren, D.G., Taylor, J.M., Rigby Jr, J.R., Locke, M.A., Yasarer, L.M. 2019. Short term sediment accumulation rates reveal seasonal time lags between sediment delivery and deposition in an oxbow lake. Agriculture, Ecosystems and Environment. 281:92-99.
Interactions among gravel and sand fractions during transport as measured by impact plates and sedflux monitor in a laboratory channel - (Proceedings)
Kuhnle, R.A., Wren, D.G., Hilldale, R.C. 2019. Interactions among gravel and sand fractions during transport as measured by impact plates and sedflux monitor in a laboratory channel. Joint Federal Interagency Sedimentation and Hydrologic Modeling. June 24-28, 2019, Reno, Nevada. 1-3.
Patterns in gravel bedload transport from impact plates in a laboratory flume - (Proceedings)
Wren, D.G., Kuhnle, R.A., Hildale, R.C. 2019. Patterns in gravel bedload transport from impact plates in a laboratory flume. Joint Federal Interagency Sedimentation and Hydrologic Modeling Conference, Reno, Nevada, June 24-28, 2019. 1-5 pp.
Assessment of levee treatments for an irrigation reservoir in Arkansas - (Peer Reviewed Journal)
Ozeren, Y., Wren, D.G., Yasarer, H. 2018. Assessment of levee treatments for an irrigation reservoir in Arkansas. Transactions of the ASABE. 61(5):1677-1689. https://doi.org/10.13031/trans.12983.
Long-term metal and arsenic mobility between wetlands and lakes variable histories within the same floodplain - (Peer Reviewed Journal)
Surbeck, C.Q., Davidson, G.R., Wren, D.G. 2018. Long-term metal and arsenic mobility between wetlands and lakes variable histories within the same floodplain. Applied Geochemistry. 96:244-251.
Sampling interval analysis and CDF generation for grain-scale gravel bed topography - (Peer Reviewed Journal)
Wren, D.G., Rigby Jr, J.R., Langendoen, E.J., Kuhnle, R.A. 2018. Sampling interval analysis and CDF generation for grain-scale gravel bed topography. Journal of Hydraulic Engineering. 144(10). https://doi.org/10.1061/(ASCE)HY.1943-7900.0001522.
Wave erosion of cohesive and non-cohesive embankments: Laboratory experiments - (Proceedings)
Ozeren, Y., Wren, D.G. 2018. Wave erosion of cohesive and non-cohesive embankments: Laboratory experiments. River Flow 2018, International Conference on Fluvial Hydraulics IAHR. Lyon, France. September 5-8, 2018. 1-8 pp.
Assessment of irrigation reservoir levee impairment in Arkansas, USA - (Peer Reviewed Journal)
Wren, D.G., Ozeren, Y., Taylor, J.M., Reba, M.L., Bowie, C. 2018. Assessment of irrigation reservoir levee impairment in Arkansas, USA. Journal of Soil and Water Conservation. 73(5):533-540. https://doi.org/10.2489/jswc.73.5.533.
Using detailed surface topography to classify dune beds in a laboratory flume - (Proceedings)
Wren, D.G., Kuhnle, R.A., Langendoen, E.J., Rigby Jr, J.R. 2019. Using detailed surface topography to classify dune beds in a laboratory flume. American Society of Civil Engineers Hydraulic Conference Proceedings. University of New Hampshire, Durham, New Hampshire, July 9-12, 2017. 7 p.
Laboratory calibration of impact plates for measuring gravel bed load size and mass - (Peer Reviewed Journal)
Kuhnle, R.A., Wren, D.G., Hilldale, R.C., Goodwiller, B.T., Carpenter, W.O. 2017. Laboratory calibration of impact plates for measuring gravel bed load size and mass. Journal of Hydraulic Engineering. 143(12), 06017023 doi:10.1061/(ASCE)HY.1943-7900.0001391.
Measurement of gravel bed load using impact plates - (Proceedings)
Kuhnle, R.A., Wren, D.G., Hilldale, R.C., Goodwiller, B.T., Carpenter, W.O. 2017. Measurement of gravel bed load using impact plates. In Proceedings of Hydraulic Measurements & Experimental Methods Conference, Durham, New Hampshire, July 9-12, 2017. 5 pp.
Signal processing of bedload transport impact amplitudes on accelerometer instrumented plates - (Proceedings)
Carpenter, W.O., Wren, D.G., Kuhnle, R.A., Hilldale, R.C., Goodwiller, B.T. 2017. Signal processing of bedload transport impact amplitudes on accelerometer instrumented plates. American Society of Civil Engineers Hydraulic Conference Proceedings. University of New Hampshie in Durham, New Hampsire, July 9-12, 2017. 1-4 pp.
Deployment of a hydrophone based passive acoustic bedload monitoring surrogate - (Proceedings)
Goodwiller, B.T., Wren, D.G., Rigby Jr, J.R., Hilldale, R.C. 2017. Deployment of a hydrophone based passive acoustic bedload monitoring surrogate. American Society of Civil Engineers Hydraulic Conference Proceedings. Hydraulic Methods and Experimental Methods Conference. University of New Hampsire in Durham, New Hampshire, July 9-12, 2017. 1-6 pp.
Laboratory experiements of wave induced embankment erosion - (Proceedings)
Ozeren, Y., Wren, D.G. 2017. Laboratory experiements of wave induced embankment erosion. American Society of Civil Engineers Hydraulic Conference Proceedings Hydraulic Methods and Experimental Methods Conference at the University of New Hampshire in Durham, New Hampshire July 9-12, 2017. 1-6 pp.
Embankment erosion and retreat by wave action: laboratory experiments - (Proceedings)
Ozeren, Y., Wren, D.G. 2017. Embankment erosion and retreat by wave action: laboratory experiments. Proceedings of the World Environmental and Water Resources Congress Conference. Sacramento, California, May 21-25, 2017. 1-9 pp.
Prediction of sand transport over immobile gravel from supply limited to capacity conditions Reprint Icon - (Peer Reviewed Journal)
Kuhnle, R.A., Langendoen, E.J., Wren, D.G. 2017. Prediction of sand transport over immobile gravel from supply limited to capacity conditions. Journal of Hydraulic Engineering. 143(7):04017010. doi:10.1061/(ASCE)HY.1943-7900.0001292.
Examining the generality of Tau_0/TKE for gravel and cobble beds with sand fill Reprint Icon - (Peer Reviewed Journal)
Wren, D.G., Ursic, M.E., Langendoen, E.J., Kuhnle, R.A. 2017. Examining the generality of Tau_0/TKE for gravel and cobble beds with sand fill. Journal of Hydraulic Engineering. 143(4):06016028. doi:10.1061/(ASCE)HY.1943-7900.0001265.
Turbulence measurements over immobile gravel with additions of sand from supply limited to capacity transport conditions - (Proceedings)
Wren, D.G., Kuhnle, R.A., Langendoen, E.J., Ursic, M.E. 2016. Turbulence measurements over immobile gravel with additions of sand from supply limited to capacity transport conditions. International Association of Hydraulic Research 2016 River Flow Conference in St. Louis, MO (http://www.iihr.uiowa.edu/riverflow2016/). July 12-15, 2016. PP. 361-362.
Field and laboratory calibration of impact plates for measuring coarse bed load transport - (Proceedings)
Carpenter, B., Wren, D.G., Kuhnle, R.A., Rigby Jr, J.R., Hilldale, R.C., Goodwiller, B.T. 2016. Field and laboratory calibration of impact plates for measuring coarse bed load transport. International Conference on Fluvial Hydraulics. 8th International Conference on Fluvial Hydraulics. River Flow 2016. July 12-15, 2016 St. Louis, MO. pp. 371-372.
A method for identifying boundary interference in PADV data - (Proceedings)
Ursic, M.E., Wren, D.G., Langendoen, E.J. 2016. A method for identifying boundary interference in PADV data. International Association of Hydraulic Research International Symposium. 8th International Conference on Fluvial Hydraulics. River Flow 2016. July 12-15, 2016 St. Louis, MO. pp. 137-138.
Prediction of sand transport over immobile gravel from supply limited to capacity conditions - (Proceedings)
Kuhnle, R.A., Langendoen, E.J., Wren, D.G. 2016. Prediction of sand transport over immobile gravel from supply limited to capacity conditions. Proceedings of the 8th International Conference on Fluvial Hydraulics. River Flow 2016. July 12-15, 2016 St. Louis, MO. pp. 340-341.
Development of a portable passive-acoustic bedload monitoring system - (Proceedings)
Goodwiller, B., Chambers, J.P., Wren, D.G., Rigby Jr, J.R., Hilldale, R.C., Carpenter, B. 2016. Development of a portable passive-acoustic bedload monitoring system. International Conference on Fluvial Hydraulics. St. Louis, MO. July 12-15, 2016. pp. 359-360.
Bed topography and sand transport responses to a step change in discharge and water depth Reprint Icon - (Peer Reviewed Journal)
Wren, D.G., Langendoen, E.J., Kuhnle, R.A. 2016. Bed topography and sand transport responses to a step change in discharge and water depth. Journal of Hydraulic Engineering. 10.1061/(ASCE)HY.1943-7900.0001172.
Acoustic signal propagation and measurement in natural stream channels for application to surrogate bed load measurements: Halfmoon Creek, Colorado - (Proceedings)
Rigby Jr, J.R., Wren, D.G., Murray, N. 2016. Acoustic signal propagation and measurement in natural stream channels for application to surrogate bed load measurements: Halfmoon Creek, Colorado. International Conference on Fluvial Hydraulics. 8th International Conference on Fluvial Hydraulics. River Flow 2016. July 12-15, 2016 St. Louis, MO. pp. 537-538.
Laboratory and field investigations of wave attenuation by live marsh vegetation - (Proceedings)
Wu, W., Ozeren, Y., Chin, Q., Jadhav, R., Wren, D.G. 2016. Laboratory and field investigations of wave attenuation by live marsh vegetation. Proceedings of the 6th International Conference on the Application of Physical Modeling in Coastal and Port Engineering and Science (Coastlab16). Proceedings online (http://rdio.rdc.uottawa.ca/publications/coastlab16/coastlab7.pdf); Ottawa, Canada, May 10-13, 2016. pp 1-10.
Passive acoustic monitoring of bed load for fluvial applications Reprint Icon - (Peer Reviewed Journal)
Rigby Jr, J.R., Wren, D.G., Kuhnle, R.A. 2016. Passive acoustic monitoring of bed load for fluvial applications. Journal of Hydraulic Engineering. doi: 10.1061/(ASCE)HY.1943-7900.0001122.
Measuring the erosion of an irrigation reservoir levee Reprint Icon - (Peer Reviewed Journal)
Wren, D.G., Ozeren, Y., Reba, M.L. 2016. Measuring the erosion of an irrigation reservoir levee. Transactions of the ASABE. 59(1):41-48. doi: 10.13031/trans.59.10751.
Determination of lake sediment accumulation rates in an agricultural watershed using lead-210 and cesium-137 Reprint Icon - (Peer Reviewed Journal)
Wren, D.G., Rigby Jr, J.R., Davidson, G.R., Locke, M.A. 2016. Determination of lake sediment accumulation rates in an agricultural watershed using lead-210 and cesium-137. Journal of Soil and Water Conservation. 71(2):137-147; doi: 10.2489/jswc.71.2.137.
Erosion of sand from a gravel bed Reprint Icon - (Peer Reviewed Journal)
Kuhnle, R.A., Wren, D.G., Langendoen, E.J. 2016. Erosion of sand from a gravel bed. Journal of Hydraulic Engineering. 142(2)04015052-1-8. doi: 10.1061/(ASCE)HY.1943-7900.0001071, 2016.
Sediment-generated noise (SGN): Laboratory determination of measurement volume - (Proceedings)
Wren, D.G., Goodwiller, B., Rigby Jr, J.R., Carpenter, W.O., Kuhnle, R.A., Chambers, J.P. 2015. Sediment-generated noise (SGN): Laboratory determination of measurement volume. Joint Federal Interagency Sedimentation and Hydrologic Modeling Proceedings, april 19-23, Reno Nevada. pp. 408-413.
Sediment-generated noise (SGN): Comparison with physical bedload measurements in a small semi-arid watershed - (Proceedings)
Rigby Jr, J.R., Wren, D.G., Kuhnle, R.A., Nichols, M.H., Goodwiller, B.T., Carpenter, W.O., Chambers, J.P. 2015. Sediment-generated noise (SGN): Comparison with physical bedload measurements in a small semi-arid watershed. In: Proceedings of the Federal Interagency Sedimentation Conference. April 19-23, Reno, Nevada. pp. 400-407.
Simultaneous determination of mercury and organic carbon using a direct mercury analyzer: Mercury profiles in sediment cores from oxbow lakes in the Mississippi Delta Reprint Icon - (Peer Reviewed Journal)
Chen, J.G., Chakravarty, P., Davidson, G.R., Wren, D.G., Locke, M.A., Zhou, Y., Cizdziel, J.V. 2015. Simultaneous determination of mercury and organic carbon using a direct mercury analyzer: Mercury profiles in sediment cores from oxbow lakes in the Mississippi Delta. Analytica Chimica Acta. 871:9-17.
Effective particle sizes of cohesive sediment in north Mississippi streams - (Proceedings)
Kuhnle, R.A., Wren, D.G. 2015. Effective particle sizes of cohesive sediment in north Mississippi streams. Joint Federal Interagency Sedimentation and Hydrologic Modeling. Reno, Nevada, April 19-23, 2015. pp. 259-268.
Erosion depth of sand from an immobile gravel bed - (Proceedings)
Kuhnle, R.A., Wren, D.G., Langendoen, E.J. 2014. Erosion depth of sand from an immobile gravel bed. In: Sediment Dynamics from the Summit to the Sea, Y.J Xu (ed) IAHS, Wallingford, UK. pp. 117-121.
Acoustic measurement of suspensions of clay and silt particles using single frequency attenuation and backscatter Reprint Icon - (Peer Reviewed Journal)
Carpenter, W.O., Goodwiller, B.T., Chambers, J.P., Wren, D.G., Kuhnle, R.A. 2014. Acoustic measurement of suspensions of clay and silt particles using single frequency attenuation and backscatter. Applied Acoustics. 85:123-129.
5.3.1 Physical sampling for suspended sediment - ()
Wren, D.G. 2017. 5.3.1 Physical sampling for suspended sediment. In: Experimental Hydraulics: Flows, Methods, Instrumentation, Data Analysis & Management, Vol II Instrumentation and Measurement Techniques, M. Muste, J. Aberle, D. Admiraal, R. Ettema, M.H. Garcia, D. Lyn, V. Nikora, and C. Rennie (Eds.). CRC Press/Balkema. PP 276-279.
5.3.2 Optical measurements - ()
Wren, D.G. 2018. 5.3.2 Optical measurements. In: Experimental Hydraulics: Flows, Methods, Instrumentation, Data Analysis & Management, Vol II Instrumentation and Measurement Techniques, M. Muste, J. Aberle, D. Admiraal, R. Ettema, M.H. Garcia, D. Lyn, V. Nikora, and C. Rennie (Eds.). CRC Press/Balkema. PP 280-283.
Laboratory experiments on dam-break flow of water-sediment mixtures - (Proceedings)
Ozeren, Y., Rui, A., Altinakar, M., and Wren, D. G. Laboratory experiments on dam-break flow of water-sediment mixtures. River Flow 2014, International Conference on Fluvial Hydraulics, Lausanne, Switzerland, September 3-5, 2014.
Studies in wave barrier design and levee erosion - ()
Wren, D.G., Ozeren, Y. 2014. Studies in wave barrier design and levee erosion. Completion report for Natural Resources Conservation Project entitled, "Updating NRCS technical release #56 with floating wave barrier guidance. Laboratory Publication. 76 pp.
Velocity field measurements in tailings dam failure experiments using a combined PIV-PTV approach - (Proceedings)
Rui, A., Ozeren, Y., Altinakar, M., Wren, D.G. 2014. Velocity field measurements in tailings dam failure experiments using a combined PIV-PTV approach. In proceedings of the 3rd International Association of Hydraulic Research Europe Congress, University of Porto, Portugal, April 14-16, 2014. 15 pp.
Predicting bed load transport of sand and gravel on Goodwin Creek - (Peer Reviewed Journal)
Kuhnle, R.A., Wren, D.G., Langendoen, E.J. 2014. Predicting bed load transport of sand and gravel on Goodwin Creek. Journal of Hydro-environment Research. 8(2):153-163.
A note on acoustic measurements of turbulence, suspended sediment, and bed forms in mobile bed experiments - (Peer Reviewed Journal)
Wren, D.G., Langendoen, E.J., Kuhnle, R.A. 2014. A note on acoustic measurements of turbulence, suspended sediment, and bed forms in mobile bed experiments. Journal of Hydro-environment Research. 8:(2)164-173.
Turbulent flow and sand transport over a cobble bed in a laboratory flume Reprint Icon - (Peer Reviewed Journal)
Wren, D.G., Kuhnle, R.A., Langendoen, E.J., Rigby Jr, J.R. 2014. Turbulent flow and sand transport over a cobble bed in a laboratory flume. Journal of Hydraulic Engineering. 140(4). doi:04014001. 2014.
Turbulence structure and sand transport over gravel and cobble beds in laboratory flumes - ()
Wren, D.G., Kuhnle, R.A., Langendoen, E.J., Pellachini, C. 2013. Turbulence structure and sand transport over gravel and cobble beds in laboratory flumes. In: Venditti, J. G., Best, J. L., Church, M., and Hardy, R. J. Coherent Flow Structures at Earth's Surface. Chichester, UK. John Wiley & Sons, Ltd, p. 341-357.
Laboratory and field investigations of marsh edge erosion - ()
Chen, Q., Ozeren, Y., Zhang, G., Wren, D., Wu, W., Jadhav, R., Parker, K., and Pant, H. Laboratory and field investigations of marsh edge erosion. pp 311-337 In Abdul, K. and Wu, W. (eds.) Sediment Transport: Monitoring, Modeling and Management. Nova Science Publishers, Inc. 390 pp. 2013.
Experimental investigation of wave attenuation through model and live vegetation - (Peer Reviewed Journal)
Ozeren, Y., Wren, D.G., Wu, W. 2013. Experimental investigation of wave attenuation through model and live vegetation. Journal of Waterway, Port, Coastal and Ocean Engineering. 140(5): 12 pp. doi: 10.1061/(ASCE)WW.1943-5460.0000251.
Effects of silt loading on turbulence and sand transport - (Peer Reviewed Journal)
Wren, D.G., Kuhnle, R.A. 2012. Effects of silt loading on turbulence and sand transport. International Journal of Sediment Research. 27(4):451-459.
Phase II Report for SERRI Project No. 80037: Investigation of surge and wave reduction by vegetation (Phase II) - ()
Wu, W., Ozeren, Y., Wren, D.G., Chen, Q., Zhang, G., Holland, M., Marsooli, R., Lin, Q., Jadhave, R., Parker, K., Pant, H., Bouanchaud, J., Chen, Y. 2012. Phase II Report for SERRI Project No. 80037: Investigation of surge and wave reduction by vegetation (Phase II). Government Publication/Report. SERRI Report No. 80037-02:1-397.
Water surface capturing by image processing - (Proceedings)
Ozeren, Y., and Wren, D. G. Water surface capturing by image processing. Hydraulic Measurements and Experimental Methods Conference, Snowbird, Utah. 6 pp. 2012. CD-ROM.
Comparison and assessment of four sediment particle-size analysis methodologies - (Proceedings)
Rigby, J. R. and Wren, D. G. Comparison and assessment of four sediment particle-size analysis methodologies. Hydraulic Measurements and Experimental Methods Conference, Snowbird, Utah. 5 pp. 2012. CD-ROM.
Performance assessment and calibration of a profiling lab-scale acoustic Doppler velocimeter for application over mixed sand-gravel beds - (Proceedings)
Ursic, M., Langendoen, E. J., Wren, D. G., Kuhnle, R. A., and Pellachini, C. Performance assessment and calibration of a profiling lab-scale acoustic Doppler velocimeter for application over mixed sand-gravel beds. Hydraulic Measurements and Experimental Methods Conference, Snowbird, Utah. 6 pp. 2012. CD-ROM.
Using terrestrial LIDAR to characterize morphology and texture of a sand and gravel bed in a laboratory flume - (Proceedings)
Ursic, M., Langendoen, E. J., Momm, H., Wren, D. G., and Kuhnle, R. A. Using terrestrial LIDAR to characterize morphology and texture of a sand and gravel bed in a laboratory flume. Hydraulic Measurements and Experimental Methods Conference, Snowbird, Utah. 6 pp. 2012. CD-ROM.
Observations on the use of acoustic Doppler velocimeters over rough beds with suspended sediment - (Proceedings)
Wren, D.G., Langendoen, E.J., Kuhnle, R.A., Pellachini, C. 2012. Observations on the use of acoustic Doppler velocimeters over rough beds with suspended sediment. Hydraulic Measurements and Experimental Methods Conference, Snowbird, Utah. 7 pp. CD-ROM.
Sand transport over an immobile gravel substrate - (Peer Reviewed Journal)
Kuhnle, R.A., Wren, D.G., Langendoen, E.J., Rigby Jr, J.R. 2013. Sand transport over an immobile gravel substrate. Journal of Hydraulic Engineering. 139(2):167-176.
Analysis of vegetation effect on waves using a vertical 2-D RANS model - (Peer Reviewed Journal)
Wu, W., Zhang, M., Ozeren, Y., Wren, D.G. 2013. Analysis of vegetation effect on waves using a vertical 2-D RANS model. Journal of Coastal Research. 29(2):383-397.
Laboratory measurements of wave attenuation through model and live vegetation - ()
Ozeren, Y. and Wren, D. G. Laboratory measurements of wave attenuation through model and live vegetation. In: Coastal Hazards pp 45–56. American Society of Civil Engineers. doi: 10.1061/9780784412664.005. 2013.
Using lake sedimentation rates to quantify the effectiveness of erosion control in watersheds - (Peer Reviewed Journal)
Wren, D.G., Davidson, G.R. 2011. Using lake sedimentation rates to quantify the effectiveness of erosion control in watersheds. Journal of Soil and Water Conservation. 66(5):313-322. doi.10.1029/2010JF001859.2011.
Assessing sedimentation issues within aging flood-control reservoirs - ()
Bennett, S.J., Dunbar, J.A., Rhoton, F.E., Allen, P.M., Bigham, J.M., Davidson, G.R., Wren, D.G. 2013. Assessing sedimentation issues within aging flood-control reservoirs. In De Graff, J.V. and Evans, J.E. (eds) The Challenges of Dam Removal and River Restoration. Geological Society of America Reviews in Engineering Geology. XXI. p. 25-44. Colorado. doi:10.1130/2013.4121(03).
Phase I Report for SERRI Project No. 80037: Investigation of surge and wave reduction by vegetation - ()
Wu, W., Ozeren, Y., Wren, D.G., Chen, Q., Zhang, G., Holland, M., Ding, Y., Kuiry, S.N., Zhang, M., Jadhave, R., Chatagnier, J., Chen, Y., Gordji, L. 2011. Phase I Report for SERRI Project No. 80037: Investigation of surge and wave reduction by vegetation. Laboratory Publication. 1:315.
Experimental Investigation of Cylindrical Floating Breakwater Performance with different mooring configurations - (Peer Reviewed Journal)
Ozeren, Y., Wren, D.G., Altinakar, M., Work, P.A. 2011. Experimental investigation of cylindrical floating breakwater performance with different mooring configurations. Journal of Waterway, Port, Coastal and Ocean Engineering. doi:10.1061/(ASCE)WW.1943-5460.0000090.
Effects of sand addition on turbulent flow over an immobile gravel bed - (Peer Reviewed Journal)
Wren, D.G., Langendoen, E.J., Kuhnle, R.A. 2011. Effects of sand addition on turbulent flow over an immobile gravel bed. Journal of Geophysical Research. 116 doi:10.1029/2010JF001859.
Connectivity and variability: metrics for riverine floodplain backwater rehabilitation - ()
Shields Jr, F.D., Knight, S.S., Lizotte Jr, R.E., Wren, D.G. 2011. Connectivity and variability: metrics for riverine floodplain backwater rehabilitation. In: Simon, A., Bennett, S., Castro, J., and Thorne, C. R. (eds.), The Scientific Basis for Stream Restoration in Dynamic Fluvial Systems: Deterministic Approaches, Analyses and Tools. American Geophysical Union. 2010, Geophysical Monograph Series 194, pp. 233-246, DOI:10.1029/2010GM000985.
Sand Transport, Flow Turbulence, and Bed Forms over an Immobile Gravel Bed - (Proceedings)
Kuhnle, R.A., Wren, D.G., Langendoen, E.J. 2010. Sand Transport, Flow Turbulence, and Bed Forms over an Immobile Gravel Bed. 11th International Symposium on River Sedimentation, Stellenbosch, South Africa, 6-9 September, 2010. CD (Conference Proceedings)
An Experimental Study of Sand Transport over an Immobile Gravel Substrate - (Proceedings)
Kuhnle, R.A., Wren, D.G., Langendoen, E.J. 2010. An Experimental Study of Sand Transport over an Immobile Gravel Substrate. 2nd Joint Federal Interagency Sedimentation Conference, Las Vegas, NV, June 27-July 1, 2010. CD (Conference Proceedings)
Floodplain Backwater Restoration: A Case Study - (Proceedings)
Shields Jr, F.D., Knight, S.S., Lizotte Jr, R.E., Bryant, C.T., Wren, D.G. 2010. Floodplain backwater restoration: A case study. Proceedings, 9th Federal Interagency Sedimentation Conference, Joint Federal Interagency Conference Organizing Committee, Washington, D.C., CD-ROM.
Effects of local immobile gravel bed elevation on turbulence - (Proceedings)
Wren, D.G., Langendoen, E.J., Kuhnle, R.A. 2010. Effects of Local Immobile Gravel Bed Elevation on Turbulence. Federal Interagency Sedimentation Conference Proceedings. CD Conference Proceedings. 9 pages.
Acoustic Measurement of Suspended Fine Particle Concentrations by Attenuation - ()
Carpenter, W.O., Chambers, J.P., Wren, D.G., Kuhnle, R.A., Diers, J.A. 2009. Acoustic Measurement of Suspended Fine Particle Concentrations by Attenuation. USDA ARS national Sedimentation Laboratory Research Report No. 67, 62 p. (Funded research project completion report)
Acoustic measurements of clay-size particles - (Peer Reviewed Journal)
Carpenter, W.O., Chambers, J.P., Wren, D.G., Kuhnle, R.A., Diers, J.A. 2009. Acoustic measurements of clay-size particles. Journal of the Acoustical Society of America. 126(6):190-195.
Reservoir sedimentation research at the National Sedimentation Laboratory - (Proceedings)
Wren, D.G., Davidson, G.R., Bennett, S.J., Hickey, C. 2009. Reservoir sedimentation research at the National Sedimentation Laboratory. National Sedimentaton Laboratory (NSL)- 50 Years of Soil & Water Research in a Changing Agricultural Environment. 113-133.
Experimental and Numerical Investigations of Floating Breakwater Performance. - ()
Ozeren, Y., Wren, D.G., Alonso, C.V. 2009. Experimental and Numerical Investigations of Floating Breakwater Performance. Laboratory Publication. #65
Predicting wind-driven waves in small reservoirs - (Peer Reviewed Journal)
Ozeren, Y., Wren, D.G. 2009. Predicting wind-driven waves in small reservoirs. Transactions of the ASABE. 52(4):1213-1221.
Flow and sand transport over an immobile gravel bed. - (Proceedings)
Wren, D.G., Langendoen, E.J., Kuhnle, R.A. 2009. Flow and sand transport over an immobile gravel bed. Congress of International Association for Hydraulic Research Proceedings. 8 pages. August 9-14/2009.
Measurement and prediction of the size of suspended sediment over dunes - (Proceedings)
Kuhnle, R.A., Wren, D.G. 2009. Measurement and prediction of the size of suspended sediment over dunes. Proceedings of the 33rd International Association of Hydrdaulic Research Congress. Water Engineering for a Sustainable Environment. Vancouver, British Columbia, Canada, 8 pp. August 9-14, 2009 (Peer-Reviewed Conference Proceedings
Size of Suspended Sediment over Dunes - (Peer Reviewed Journal)
Kuhnle, R.A., Wren, D.G. 2009. Size of Suspended Sediment over Dunes. Journal of Geophysical Research. 114, F02020, doi:10.1029/2008JF001200
Towards a Basis for Designing Backwater and Side Channel Restorations - (Proceedings)
Shields Jr, F.D., Knight, S.S., Stofleth, J.M., Wren, D.G. 2009. Towards a Basis for Designing Backwater and Side Channel Restorations. Water Engineering for a Sustainable Environment, Proceedings, International Association for Hydraulic Research 33rd Congress, IAHR, Madrid, CD-ROM.
Measurements of Coupled Fluid and Sediment Motion Over Mobile Sand Dunes in a Laboratory Flume - (Peer Reviewed Journal)
Wren, D.G., Kuhnle, R.A. 2008. Measurements of Coupled Fluid and Sediment Motion Over Mobile Sand Dunes in a Laboratory Flume. International Journal of Sediment Research. Vol. 23 (4) pp.329-337.
Development of Floating Wave Barriers for Cost Effective Protection of Irrigation Pond Levees - (Peer Reviewed Journal)
Ozeren, Y., Wren, D.G., Alonso, C.V. 2008. Development of Floating Wave Barriers for Cost Effective Protection of Irrigation Pond Levees. Transactions of the ASABE. 51(5): 1599-1612.
Estimation of concentration and particle size distribution of natural sands suspended in water using acoustic backscatter - (Proceedings)
Chambers, J.P., Smith, C., Wren, D.G., Kuhnle, R.A. 2008. Estimation of concentration and particle size distribution of natural sands suspended in water using acoustic backscatter. National Sedimentaton Laboratory (NSL)- 50 Years of Soil & Water Research in a Changing Agricultural Environment. p. 907-921.
Experimental sediment transport research at the USDA National Sedimentation Laboratory - (Proceedings)
Kuhnle, R.A., Wren, D.G., Alonso, C.V. 2008. Experimental sediment transport research at the USDA National Sedimentation Laboratory. National Sedimentaton Laboratory (NSL)- 50 Years of Soil & Water Research in a Changing Agricultural Environment. p. 45-65.
Practical Implications of Quantifying Ancient Sedimentation Rates in Lakes - (Peer Reviewed Journal)
Wren, D.G., Davidson, G.R. 2008. Practical Implications of Quantifying Ancient Sedimentation Rates in Lakes. Journal of Soil and Water Conservation. 63(3): 89A.
The Evolution of an Oxbow Lake in the Mississippi Alluvial Floodplain - (Peer Reviewed Journal)
Wren, D.G., Davidson, G.R., Walker, W.G., Galicki, S.J. 2008. The Evolution of an Oxbow Lake in the Mississippi Alluvial Floodplain. Journal of Soil and Water Conservation. 6(3): 129-135.
Size of Suspended Sediment Over Dunes - (Proceedings)
Kuhnle, R.A., Wren, D.G. 2007. Size of Suspended Sediment Over Dunes. In: Proceedings of Hydraulic Measurements and Experimental Methods Conference, Lake Placid, NY, p. 274-279.
Time Scales in Turbulence and Sediment Concentration Over Mobile Sand Dunes - (Proceedings)
Wren, D.G., Kuhnle, R.A. 2007. Time Scales in Turbulence and Sediment Concentration Over Mobile Sand Dunes. Environmental and Water Resources Institute World Congress Proceedings. 6 pp. 2007. CD-ROM
Accurate lacustrine and wetland sediment accumulation rates determined from 14c activity of bulk sediment fractions - (Peer Reviewed Journal)
Walker, W.G., Davidson, G.R., Lange, T., Wren, D.G. 2007. Accurate lacustrine and wetland sediment accumulation rates determined from 14c activity of bulk sediment fractions. Radiocarbon. 49(2):983-992.
Measurements of the relationship between turbulence and sediment in suspension over mobile sand dunes in a laboratory flume - (Peer Reviewed Journal)
Wren, D.G., Kuhnle, R.A., Wilson, C. 2007. Measurements of the relationship between turbulence and sediment in suspension over mobile sand dunes in a laboratory flume. Journal of Geophysical Research. 112:F03009, doi:10.1029/2006JF000683.
PREDICTION OF THE GRAIN SIZE OF SUSPENDED SEDIMENT: IMPLICATIONS FOR CALCULATING SUSPENDED SEDIMENT CONCENTRATIONS USING SINGLE FREQUENCY ACOUSTIC BACKSCATTER - (Peer Reviewed Journal)
Kuhnle, R.A., Wren, D.G., Chambers, J.P. 2007. Prediction of the grain size of suspended sediment: implications for calculating suspended sediment concentrations using single frequency acoustic backscatter. International Journal of Sediment Research, 22(1): 1-15.
Sedimentation in three small erosion control reservoirs in northern Mississippi - (Peer Reviewed Journal)
Wren, D.G., Wells, R.R., Wilson, C.G., Cooper, C.M., Smith Jr, S. 2007. Sedimentation in three small erosion control reservoirs in northern Mississippi. Journal of Soil and Water Quality. 62(3): 137-144.
Closure to discussion of “Distributions of velocity, turbulence, and suspended sediment over low-relief antidunes" by Wu, P. and Jin, Y.C. - (Peer Reviewed Journal)
Wren, D.G., Bennett, S.J., Barkdoll, B.D., Kuhnle, R.A. 2006. Closure to discussion of “Distributions of velocity, turbulence, and suspended sediment over low-relief antidunes" by Wu, P. and Jin, Y.C. Journal of Hydraulic Research IAHR. 44(5):718-720.
Practical guidance for discharge and water quality data collection on small watersheds - (Peer Reviewed Journal)
Harmel, R.D., King, K.W., Haggard, B.E., Wren, D.G., Sheridan, J.M. 2006. Practical guidance for discharge and water quality data collection on small watersheds. Transactions of the ASABE. 49(4):937-948.
ESTIMATION OF PARTICLE SIZES FOR A RANGE OF NARROW SIZE DISTRIBUTIONS OF NATURAL AND SUSPENDED IN WATER USING MULTIFREQUENCY ACOUSTIC BACKSCATTER - (Proceedings)
Smith, C.K., Wren, D.G., Chambers, J.P. 2006. Estimation of particle sizes for a range of narrow size distributions of natural and suspended in water using multifrequency acoustic backscatter. In: Proceedings of the 8th Federal Interagency Sedimentation Conference, April 2-6, 2006, Reno, Nevada. CDROM.
DEVELOPMENT OF AN ACOUSTIC SUSPENDED SEDIMENT MONITORING SYSTEM - (Proceedings)
Kleinert, D.E., Wren, D.G., Smith, C.K., Chambers, J.P. 2006. Development of an acoustic suspended sediment monitoring system. In: Proceedings of the 8th Federal Interagency Sedimentation Conference, April 2-6, 2006, Reno, Nevada. CDROM.
ACOUSTIC PROFILING OF SEDIMENT ACCUMULATION IN THREE SMALL EROSION CONTROL RESERVOIRS IN NORTH MISSISSIPPI - (Proceedings)
Leary, D., Hickey, C.J., Wren, D.G. 2006. Acoustic profiling of sediment accumulation in three small erosion control reservoirs in north Mississippi. In: Proceedings of the 8th Federal Interagency Sedimentation Conference, April 2-6, 2006, Reno, Nevada. CDROM.
SEDIMENTATION IN THREE SMALL EROSION CONTROL RESERVOIRS IN NORTH MISSISSIPPI - (Proceedings)
Wren, D.G., Wells, R.R., Wilson, C.G., Cooper, C.M., Leary, D., Hickey, C.J. 2006. Sedimentation in three small erosion control reservoirs in north Mississippi. In: Proceedings of the 8th Federal Interagency Sedimentation Conference, April 2-6, 2006, Reno, Nevada. CDROM.
PREDICTION OF THE GRAIN SIZE OF SUSPENDED SEDIMENT; IMPLICATIONS FOR CALCULATING SUSPENDED SEDIMENT CONCENTRATIONS USING SINGLE FREQUENCY ACOUSTIC BACKSCATTER - (Proceedings)
Kuhnle, R.A., Wren, D.G., Chambers, J.P. 2006. Prediction of the grain size of suspended sediment; implications for calculating suspended sediment concentrations using single frequency acoustic backscatter. In: Proceedings of the 8th Federal Interagency Sedimentation Conference, April 2-6,2006, Reno, Nevada. CDROM.
VELOCITY AND SUSPENDED-SEDIMENT MEASUREMENTS OVER MOBILE SAND DUNES IN A LABORATORY FLUME - (Proceedings)
Wren, D.G., Kuhnle, R.A., Wilson, C.G. Velocity and suspended-sediment measurements over mobile sand dunes in a laboratory flume. Environmental and Water Resources Institute World Congress Proceedings. Available: http://ascelibrary.org/2005conferences/ASCECP000173040792
DISTRIBUTIONS OF VELOCITY, TURBULENCE, AND SUSPENDED SEDIMENT OVER LOW-RELIEF ANTIDUNES - (Peer Reviewed Journal)
Wren, D.G., Bennett, S.J., Barkdoll, B.D., Kuhnle, R.A. 2005. Distributions of velocity, turbulence, and suspended sediment over low-relief antidunes. Journal of Hydraulic Research. 43(1): 3-11.