Kevn Xu headshotKehui (Kevin) Xu

Position: Director, Coastal Studies Institute; James P. Morgan Distinguished Professor; Associate Professor, Department of Oceanography & Coastal Sciences

Phone: 225-578-0389

Fax: 225-578-6513

E-mail: kxu@lsu.edu 

Office: 2165 Energy, Coast and Environment Building

Bachelor's Degree: B.S. Geology & Computer Applications, Ocean University of China, 1999

Master's Degree: M.S. Geological Oceanography, Ocean University of China, 2002

Ph.D. Degree: Ph.D. Marine Science, College of William and Mary, 2006

Sediments Dynamic Lab website

Research Interests

Coastal restoration; sediment diversion; sediment dredging and management, geological oceanography, coastal morphodynamics, observation and numerical modeling of sediment transport, sedimentary geology, coastal processes

Research Projects

Google Scholar Profile

Bureau of Ocean Energy Management, (2019-2022), "Responses of Ecological Function of the Ship Shoal Biological Communities Subjected to Dredging", PI, Nelson, J., Co-PI, Xu, K.H., Roberts, B., Rieucau, G.

Bureau of Ocean Energy Management, (2019-2022), "Impact of Non-linear sedimentation on Dredge Area Benthic Ecosystem on Louisiana Shelf ", PI, Xue, Z., Co-PI, Xu, K.H., Maiti, K., Glaspie, C.

Bureau of Ocean Energy Management, (2019-2022), "Investigation of an Ancient Bald Cypress Forest in the Northern Gulf of Mexico, Phase 2",PI, DeLong, K., Co-PI, Harley, G., Bentley, S., Xu, K.H., Reese, C, Obelcz, J.

U.S. Coastal Research Program, (2019-2021), "Evaluation the Distribution and Geotechnical Properties of Outer Continental Shelf (OCS) Sand Resources and Coupled Environmental Responses to Dredging", PI, Jafari, N., Co-PI, Xu, K.H.,

Louisiana Coastal Protection and Restoration Authority, Coastal Science Assistantship Program (2019-2022), "Quantifying Erosional Process in Sediment Diversion Receiving Basins". PI, Xu, K.H.

Bureau of Ocean Energy Management (2017-2020), "Development of a Monitoring Program for Water Quality and Biogeochemical Processes of Louisiana Sediment Borrow Areas", PI, Xu, K.H., Co-PI, Maiti, K., Bargu, S., Bentley, S., White, J., Wilson, C., Xue, Z.

Bureau of Ocean Energy Management (2016-2020), "Assessment of Ship Shoal Borrow Areas for Coastal Restoration of Louisiana Barrier Islands", PI, Xu, K.H., Co-PI, Bentley, S., Li, C, Shaw, R., Wilson, C.

Louisiana Center of Excellence, through The Water Institute of Gulf (2017-2020), "Integrating High-Fidelity Models with New Remote Sensing Techniques to Predict Storm Impacts on Louisiana Coastal and Deltaic Systems", PI, Xu, K.H., Co-PI, Chen, Q., Couvillion, B., Jeuken C.

Louisiana Center of Excellence, through The Water Institute of Gulf (2017-2020), "Enhancing Sediment Retention Rates of Receiving Basins of Louisiana Sediment Diversions", PI, Xu, K.H., Co-PI, Bentley, S., Ma, Y., Xue, Z.

Louisiana Coastal Protection and Restoration Authority (2019), 2019 Survey of Mississippi River near Middle Breton Diversion, PI, Bentley, S., Co-PI, Xu, K.H., Hiatt, M.

National Science Foundation (2017-2018), "Collaborative Research: Continuous vs. episodic fluviodeltaic sedimentation: Implications for carbon sequestration and coastal restoration", PI, Xu, K.H., subcontract with Coastal Carolina University.

Louisiana Board of Regents, Traditional Enhancement Program (2016-2017), “Acquisition of Acoustic and Optical Sensors to Enhance the Research and Teaching of Sediment Diversion and Coastal Restoration”, PI, Xu, K.H.

Louisiana Sea Grant, (2016-2018), “From Physics to Oysters: An Integrated Modeling Study of the Potential Impacts of Future Large Sediment Diversions on Louisiana Eastern Oyster“. PI, Huang, H., Co-PI, Justic, D., Xu, K.H., LaPeyre, M., LaPeyre, J.

Bureau of Ocean Energy Management, (2015-2018), “Investigation of an Ancient Bald Cypress Forest in the Northern Gulf of Mexico, U.S.A.”,PI, DeLong, K., Co-PI, Harley, G., Bentley, S., Xu, K.H., Reese, C.

Louisiana Coastal Protection and Restoration Authority, (2015-2016), “Reducing Uncertainty on Nutrient Removal for Sediment Diversions”, PI, White, J., Co-PI, Xu, K.H.

National Science Foundation, (2014-2017), “Coastal SEES Collaborative Research: Changes in actual and perceived coastal flood risks due to river management strategies”, PI, Twilley, R., Co-PI, Xu, K.H., Bentley, S., Chen, Q., Lam, N.

Bureau of Ocean Energy Management (2014-2017), “Assessment of Mud-Capped Dredge Pit Evolution on the Outer Continental Shelf of northern Gulf of Mexico”, PI, Xu, K.H., Co-PI, Bentley, S., Li, C.

Louisiana Coastal Protection and Restoration Authority (2014-2015), Applied Research Program, “Characterization and Modeling of Sediment Settling, Consolidation, and Suspension to Optimize the Retention Rate of Sediment Diversions for Coastal Restoration”, PI, Xu, K.H., Co-PI, Bentley, S.

National Science Foundation and the Louisiana Board of Regents, EPSCoR Pfund Program (2014-2015), “A Study of Sediment-Plant Interaction to Benefit Coastal Protection and Restoration”, PI, Xu, K.H.

The Water Institute of Gulf (2014-2015), “Geological and Geotechnical Characterization of Middle Barataria Bay and Middle Breton Sound Diversion Receiving Basins“, PI, Bentley, S., Co-PI, Xu, K.H., Chen, Q.

Bureau of Ocean Energy Management (2013-2016), “Mass Wasting Processes and Products of the Mississippi Delta Front: Data Synthesis and Observation”, PI, Bentley, S., Co-PI, Xu, K.H., Georgiou, I. [link]

The Water Institute of Gulf (2013-2014), “Geological and Geotechnical Characterization of Lower Barataria Bay and Lower Breton Sound Diversion Receiving Basins“, PI, Bentley, S., Co-PI, Xu, K.H., Chen, Q.

Classes Taught

OCS 4210 – Geological Oceanography
OCS 4024 – Coastal Morphodynamics

Awards, Honors and Service

2020–present, Chair of Education and Knowledge Transfer of Community Surface Dynamics Modeling System (CSDMS)

2015–present, Associate Editor of Estuarine, Coastal and Shelf Science

2020, LSU Alumni Association Faculty Excellence Award

2017, LSU Alumni Association Rising Faculty Research Award

2015, LSU Tiger Athletic Foundation Undergraduate Teaching Award

2015, Phi Kappa Phi Non-Tenured Professor Award, LSU Chapter

2013, Top 25 most cited articles published on ‘Geomorphology’, 2008-2013; Xu and Milliman (2009)

2012–present, James P. Morgan Distinguished Professorship, Louisiana State University

2011-2012 Emerging Scholar Incentive Award, Coastal Carolina University

Recent Publications

View the full list on Dr. Xu's lab page.

Zhang, X., Xu, K.H., Yang, Z.,  Tan, X., Wu, C., 2021. Decreasing land growth and unique seasonal area fluctuations of two newborn Mississippi subdeltas, Geomorphology, 378, 107617, https://doi.org/10.1016/j.geomorph.2021.107617.

Xu, K.H., Wren, P. A., Ma, Y., 2020. Tidal and Storm Impacts on Hydrodynamics and Sediment Dynamics in an Energetic Ebb Tidal Delta. Journal of Marine Science and Engineering, 8(10), 810. https://doi.org/10.3390/jmse8100810

Ou, Y., Xue, Z., Li, C., Xu, K.H., White, J. R., Bentley, S. J., Zang, Z., 2020. A numerical investigation of salinity variations in the Barataria Estuary, Louisiana in connection with the Mississippi River and restoration activities. Estuarine, Coastal and Shelf Science, 107021. https://doi.org/10.1016/j.ecss.2020.107021

Li*, G., Xu, K.H., Xue, Z., Liu, H., Bentley, S. J., 2020. Hydrodynamics and sediment dynamics in Barataria Bay, Louisiana, USA. Estuarine, Coastal and Shelf Science, 107090. https://doi.org/10.1016/j.ecss.2020.107090

Liu*, H., Xu, K.H., Wilson, C., 2020. Sediment infilling and geomorphological change of a mud-capped Raccoon Island dredge pit near Ship Shoal of Louisiana shelf, Estuarine, Coastal and Shelf Science, 245, 106979.  https://doi.org/10.1016/j.ecss.2020.106979.

Zang, Z., Xue, Z. G., Xu, K.H., Bentley, S. J., Chen, Q., D'Sa, E. J., Zhang, L., and Ou, Y., 2020. The Role of Sediment-induced Light Attenuation on Primary Production during Hurricane Gustav (2008), Biogeosciences Discuss.,  https://doi.org/10.5194/bg-2020-58, accepted.

Zang, Z., Xue, Z. G., Xu, K.H., Ozdemir, C. E., Chen, Q., & Bentley, S. J., et al., 2020. A numerical investigation of wave‐supported gravity flow during cold fronts over the Atchafalaya shelf. Journal of Geophysical Research: Oceans, 125, e2019JC015269. https://doi.org/10.1029/2019JC015269

Yang, SL, Luo, X,Temmerman, S, Kirwan, M,Bouma, T, Xu, K.H., Zhang, S, et al., 2020, Role of delta‐front erosion in sustaining salt marshes under sea‐level rise and fluvial sediment decline, Limnology and Oceanography, 65(9), 1990-2009.

Liu*, H., Xu, K.H., Ou, Y., Bales, R., Zang, Z., Xue, Z.G., 2020. Sediment Transport near Ship Shoal for Coastal Restoration in the Louisiana Shelf: A Model Estimate of the Year 2017–2018. Water 2020, 12, 2212.

Elliton*, C., Xu, K.H., Rivera-Monroy, V.H., 2020. The Impact of Biophysical Processes on Sediment Transport in the Wax Lake Delta (Louisiana, USA). Water 2020, 12, 2072.

Chaytor, J. D., Baldwin, W. E., Bentley, S. J., Damour, M., Jones, D., Maloney, J., Miner, M. D., Obelcz*, J., Xu, K.H., 2020. Short-and long-term movement of mudflows of the Mississippi River Delta Front and their known and potential impacts on oil and gas infrastructure. Geological Society, London, Special Publications, 500.

Robichaux*, P., Xu, K.H., Bentley, S. J., Miner, M., Xue, Z., 2020. Morphological evolution of a mud-capped dredge pit on the Louisiana shelf: Nonlinear infilling and continuing consolidation. Geomorphology, https://doi.org/10.1016/j.geomorph.2019.107030, 107030.

Shi, B., Pratolongo, P. D., Du, Y., Li, J., Yang, S., Wu, J., Xu, K.H., Wang, Y. P., 2020. Influence of macrobenthos (Meretrix meretrix Linnaeus) on erosion-accretion processes in intertidal flats: A case study from a cultivation zone. Journal of Geophysical Research: Biogeosciences, doi: 10.1029/2019JG005345.

Liu, J, Liang, JH, Xu, K.H., Chen, Q, Ozdemir, CE, 2019. Modeling sediment flocculation in Langmuir turbulence, Journal of Geophysical Research: Oceans, 124. https://doi.org/10.1029/2019JC015197.

Maloney, JM, Bentley, SJ, Xu, K,H., Obelcz,J, Georgiou, IY, Jafari,NH, Miner, M., 2019. Mass wasting on the Mississippi River subaqueous delta, Earth-Science Reviews, 103001.

Bomer, E.J., Bentley, S.J., Hughes, J.E.T., Wilson, C.A., Crawford, F., Xu, K.H., 2019. Deltaic morphodynamics and stratigraphic evolution of middle Barataria Bay and middle Breton sound regions, Louisiana, USA: Implications for River-Sediment Diversions, Estuarine, Coastal and Shelf Science, 224, 20-33. https://doi.org/10.1016/j.ecss.2019.03.017.

Wang*, J., Xu, K.H., Bentley, S.J., White, C., Zhang, X., Liu, H., 2019. Degradation of the plaquemines sub-delta and relative sea-level in eastern Mississippi deltaic coast during late holocene, Estuarine, Coastal and Shelf Science, 106344. https://doi.org/10.1016/j.ecss.2019.106344.

Chaichitehrani, N., Li, C., Xu, K.H., Allahdadi, M.N., Hestir, E.L., Keim, B.D., 2019. A numerical study of sediment dynamics over Sandy Point dredge pit, west flank of the Mississippi River, during a cold front event, Continental Shelf Research, 183, 38-50. https://doi.org/10.1016/j.csr.2019.06.009.

Yang, S.L., Fan, J.Q., Shi, B.W., Bouma,T.J., Xu, K.H., Yang, H.F., Zhang, S.S., Zhu, Q., Shi, X.F., 2019. Remote impacts of typhoons on the hydrodynamics, sediment transport and bed stability of an intertidal wetland in the Yangtze Delta, Journal of Hydrology, 575, 755-766, https://doi.org/10.1016/j.jhydrol.2019.05.077.

Xu, K.H., Bentley, S.J., Day, J.W., Freeman, A.M., 2019. A review of sediment diversion in the Mississippi River Deltaic Plain, Estuarine, Coastal and Shelf Science 225, 106241, https://doi.org/10.1016/j.ecss.2019.05.023.

Liu*, H., Xu, K.H., Li, B., Han, Y., Li*, G., 2019 Sediment Identification Using Machine Learning Classifiers in a Mixed-Texture Dredge Pit of Louisiana Shelf for Coastal Restoration. Water, 11, 1257. https://www.mdpi.com/2073-4441/11/6/1257.

Zang, Z., Xue, Z.G., Xu, K.H., Bentley, S.J., Chen, Q., D'Sa, E.J., Ge, Q. A. 2019. Two Decadal (1993–2012) Numerical Assessment of Sediment Dynamics in the Northern Gulf of Mexico. Water, 11, 938.

Li, A, Tsai, FTC, Xu, K.H., Wang*, J., White, CM , Bentley, SJ, Chen, QJ., 2019. Modeling sediment texture of river-deltaic wetlands in the Lower Barataria Bay and Lower Breton Sound, Louisiana, USA, Geo-Marine Letters 39 (2), 161-173. https://doi.org/10.1007/s00367-019-00566-2.

Hurst, N.R., White, J.R., Xu, K.H., Ren, M. 2019. Nitrate reduction rates in sediments experiencing turbulent flow conditions, Ecological Engineering, 128, 33-38. https://doi.org/10.1016/j.ecoleng.2018.12.027.

Reese, C.A. , Harley, G.L., DeLong, K.L., Bentley, S.J., Xu, K.H., Gonzalez, S., Truong, J.T., Obelcz*, J., Caporaso, A., 2018. Stratigraphic pollen analysis performed on a late Pleistocene cypress forest preserved on the northern Gulf of Mexico continental shelf, Journal of Quaternary Science, 33(8), 865-870. https://doi.org/10.1002/jqs.3074.

Moriarty, J.M. , Harris, C.K., Friedrichs, MAM, Fennel, K., Xu, K.H., 2018. Impact of seabed resuspension on oxygen and nitrogen dynamics in the northern Gulf of Mexico: A numerical modeling study, Journal of Geophysical Research: Oceans, 123. https://doi.org/10.1029/2018JC013950.

Restreppo, G.A., Bentley, S.J., Wang*, J., Xu, K.H., 2018. Riverine Sediment Contribution to Distal Deltaic Wetlands: Fourleague Bay, LA, Estuaries and Coasts. https://doi.org/10.1007/s12237-018-0453-0.

Wang*, J., Xu, K.H., Restreppo, G., Bentley, S., Meng, X., Zhang X., 2018. The coupling of bay hydrodynamics to sediment transport and its implication in micro-tidal wetland sustainability, Marine Geology, 405, 68–76. https://doi.org/10.1016/j.margeo.2018.08.005.

Hu, G., Xu, K.H., Clift P.D., Zhang, Y., Li, Y., Qiu, J., Kong, X., Bi, S., 2018. Textures, provenances and structures of sediment in the inner shelf south of Shandong Peninsula, western South Yellow Sea, Estuarine, Coastal and Shelf Science, 212, 153–163. https://doi.org/10.1016/j.ecss.2018.07.018.

Wang*, J., Xu, K.H., Obelcz*, J., Li, C., 2018, Forces Driving the Morphological Evolution of a Mud-Capped Dredge Pit, Northern Gulf of Mexico, Water, 10, 1001; doi:10.3390/w10081001.

Obelcz*, J., Xu, K.H., Bentley, S.J., O'Connor, M., Miner, M., 2018. Mud-capped dredge pits: An experiment of opportunity for characterizing cohesive sediment transport and slope stability in the northern Gulf of Mexico, Estuarine, Coastal and Shelf Science, 208, 161-169.

Liu, K, Chen, Q, Hu, K., Xu, K.H., Twilley, RR, 2018. Modeling hurricane-induced wetland-bay and bay-shelf sediment fluxes, Coastal Engineering, 135, 77-90.https://doi.org/10.1016/j.coastaleng.2017.12.014

Yang, HF , Yang, SL , Xu, K.H., Milliman, JD , Wang, H , Yang, Z , Chen, Z, 2018. Human impacts on sediment in the Yangtze River: A review and new perspectives, Global and Planetary Change 162, 8-17. https://doi.org/10.1016/j.gloplacha.2018.01.001

Sha*, X , Xu, K.H., Bentley, SJ , *Robichaux, PA, 2018. Characterization and modeling of sediment settling, consolidation, and suspension to optimize coastal Louisiana restoration, Estuarine, Coastal and Shelf Science, 203, 137-147. https://doi.org/10.1016/j.ecss.2018.02.008

Yang, HF , Yang, SL , Meng, Y , Xu, K.H., Luo, XX , Wu, CS , Shi, BW, 2018. Recent coarsening of sediments on the southern Yangtze subaqueous delta front: A response to river damming, Continental Shelf Research, 155, 45-51. https://doi.org/10.1016/j.csr.2018.01.012

Maloney, J.M., Bentley, S.J., Xu, K.H., Obelcz*, J., Miner, M., Georgiou, I., 2018. Mississippi River subaqueous delta is entering a stage of retrogradation, Marine Geology, 400, 12-23. https://doi.org/10.1016/j.margeo.2018.03.001.

Thomas, T., Warny, S., Jarzen, D., Bentley, S., Droxler, A., Harper, B., Nittrouer, C., Xu, K.H., 2018. Palynomorph Evidence for Tropical Climate Stability in the Gulf of Papua, Papua New Guinea, over the Latest Marine Transgression and Highstand (14,500 Years BP to Today), Quaternary International. https://doi.org/10.1016/j.quaint.2017.12.035.

Gonzalez, S., Bentley, S J., DeLong, K.L., Xu, K.H., Obelcz*, J., Truong, J., Harley, G.L., Reese, C.A., Caporaso, A., 2017, Facies reconstruction of a late Pleistocene cypress forest discovered on the northern Gulf of Mexico continental shelf: Gulf Coast Association of Geological Societies Transactions, v. 67, p. 133–146.

Cui, X., Bianchi, T.S., Kenney, W., Wang*, J., Curtis, J., Xu, K.H., Savage, C., 2017. Sediment and Carbon Dynamics along Temperate Fjord-Head Deltas: Linkages with Fjord Processes, Journal of Geophysical Research: Biogeosciences, DOI: 10.1002/2017JG003891.

Li, Q., Benson, M., Harlan, M., Robichaux*, P., Sha*, X., Xu, K.H., Straub, K.M., 2017. Influence of sediment cohesion on deltaic morphodynamics and stratigraphy over basin-filling time scales, Journal of Geophysical Research: Earth Surface, 122, 1808–1826. https://doi.org/ 10.1002/2017JF004216.

Yang, H.F., Yang, S.L. , Xu, K.H., Wu, H. , Shi, B.W., Zhu, Q., Zhang, W.X., Yang, Z., 2017. Erosion potential of the Yangtze Delta under sediment starvation and climate change, Scientific Reports 7, 10535 (2017), doi:10.1038/s41598-017-10958-y

Yang, H.F., Yang, S.L., Xu, K.H., 2017. River-sea transitions of sediment dynamics: A case study of the tide-impacted Yangtze River estuary, Estuarine, Coastal and Shelf Science 196 (2017) 207-216. http://dx.doi.org/10.1016/j.ecss.2017.07.005

Obelcz*, J., Xu, K.H., Georgiou, I.Y., Maloney, J., Bentley, S.J., Miner, M.D., 2017. Annual-periodicity submarine landslides mass wasting on the Mississippi River Delta Front not associated with catastrophic events, Geology, 45(7), doi:10.1130/G38688.1.

Moriarty, J.M., Harris, C.K. , Fennel, K., Xu, K.H., Rabouille, C., Friedrichs, M.A.M., 2017. The roles of resuspension, diffusion and biogeochemical processes on oxygen dynamics offshore of the Rhône River, France: a numerical modeling study, Biogeosciences, 14, 1919-1946, 2017. doi:10.5194/bg-14-1919-2017.