EC31B:
Geological and Biogeochemical Dynamics in Major Deltaic Coasts I


Session ID#: 11320

Session Description:
River deltas occupy only 5% of the Earth’s surface, but nourish over a half billion people around the world. Deltas play a vital role in transferring water, sediment and nutrients to the global coastal ocean. Many river deltas, however, are endangered because of rising relative sea level and coastal erosion, leading to significant threats to natural, economic and social systems. During the past half century, lots of deltas have been impacted by human activities, such as levee construction, dam construction-induced sediment decline, as well as fertilizer-induced coastal hypoxia. In this session we encourage the submissions of the studies on geological processes, biogeochemical processes and the interaction of two in dynamic major deltaic systems through the use of field observations, numerical models, or laboratory experiments. We propose to gather presentations that highlight recent findings on various aspects of deltaic sciences, including coastal morphodynamics, sedimentary geology, sediment transport, coastal restoration, biogeochemical cycles, as well as the linkages of water-column and seabed processes. Studies on the Mississippi and Yangtze dispersal systems are particularly encouraged, and the studies in other deltaic systems are certainly welcome.
Primary Chair:  Kehui Xu, Louisiana State University, Department of Oceanography and Coastal Sciences, Baton Rouge, LA, United States
Chairs:  Thomas S Bianchi, University of Florida, Geological Sciences, Ft Walton Beach, FL, United States, Zhongyuan Chen, East China Normal University, State Key Laboratory of Estuarine and Coastal Research, Shanghai, China and Wei-Jun Cai, University of Delaware, School of Marine Science and Policy, Newark, DE, United States
Moderators:  Kehui Xu, Louisiana State University, Oceanography and Coastal Sciences, Baton Rouge, LA, United States, Thomas S Bianchi, University of Florida, Geological Sciences, Ft Walton Beach, FL, United States and Wei-Jun Cai, University of Delaware, Newark, DE, United States
Student Paper Review Liaison:  Zhongyuan Chen, East China Normal University, State Key Laboratory of Estuarine and Coastal Research, Shanghai, China
Index Terms:

3022 Marine sediments: processes and transport [MARINE GEOLOGY AND GEOPHYSICS]
4805 Biogeochemical cycles, processes, and modeling [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4825 Geochemistry [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4845 Nutrients and nutrient cycling [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
Co-Sponsor(s):
  • B - Biogeochemistry and Nutrients
  • MG - Marine Geology & Sedimentology

Abstracts Submitted to this Session:

EC31B-01
Future Earth Coasts: The Mississippi and Yangtze Rivers as Examples (92278)
Christopher D'Elia, Louisiana State University, School of the Coast and Environment, Baton Rouge, LA, United States, Kehui Xu, Louisiana State University, Department of Oceanography and Coastal Sciences, Baton Rouge, LA, United States, Zhongyuan Chen, East China Normal University, State Key Laboratory of Estuarine and Coastal Research, Shanghai, China, John Day, LSU, School of the Coast and Environment, Baton Rouge, LA, UNITED STATES and Martin Le Tissier, Future Earth Coasts, IMERC Office, National Maritime College of Ireland, Ringaskiddy, Co. Cork, Ireland
EC31B-02
The fate of Phosphorus in the Yangtze (Changjiang) Estuary, China, under multi-stressors: hindsight and forecast (89226)
Zhongyuan Chen, East China Normal University, State Key Laboratory of Estuarine and Coastal Research, Shanghai, China, Hao Xu, Ningbo University, Department of urbanscience, Ningbo, China, Alice Newton, Box 100, 2027 Kjeller, NILU-IMPEC, Oslo, Norway and Eric Wolanski, James Cook Univeristy, Townsville, Australia
EC31B-04
Rapid Progradation and Land Creation by a Major River Subdelta (90278)
Elizabeth L Chamberlain, Vanderbilt University, Dept. of Earth and Environmental Sciences, Nashville, TN, United States, Torbjorn E Tornqvist, Tulane University of Louisiana, Department of Earth and Environmental Sciences, New Orleans, LA, United States, Zhixiong Shen, Tulane University of Louisiana, New Orleans, LA, United States and Barbara Mauz, University of Liverpool, School of Environmental Sciences, Liverpool, United Kingdom
EC31B-05
The sediment-starved Yellow River Delta as remotely controlled by human activities in the river basin (87956)
Houjie Wang1, Yoshiki Saito2, Naishuang Bi1, James P Syvitski3 and Zuosheng Yang1, (1)Ocean University of China, Qingdao, China, (2)Estuary Research Center, Shimane University, Matsue, Japan, (3)University of Colorado, INSTAAR, Boulder, CO, United States
EC31B-06
Spatial and temporal variation in erosion and accumulation of the subaqueous Yellow River delta (1976-2004) (88544)
Naishuang Bi, Guopan Xing, Houjie Wang and Zuosheng Yang, Ocean University of China, Qingdao, China
EC31B-07
Assessment of Mud-Capped Dredge Pit Evolution Offshore Louisiana: Implications to Sand Excavation and Coastal Restoration (91793)
Kehui Xu1,2, MIke D Miner3, Samuel J Bentley4, Chunyan Li1, Jeffrey Obelcz5 and Meg Cathlin O'Connor6, (1)Louisiana State University, Department of Oceanography and Coastal Sciences, Baton Rouge, LA, United States, (2)Louisiana State University, Coastal Studies Institute, Baton Rouge, LA, United States, (3)U.S Department of Interior, Bureau of Ocean Energy Management, New Orleans, LA, United States, (4)Louisiana State University, Baton Rouge, LA, United States, (5)Coastal Studies Institute, Baton Rouge, LA, United States, (6)Louisiana State University, Geology and Geophysics, Baton Rouge, LA, United States
EC31B-08
Evolution of mud-capped dredge pits following excavation: sediment trapping and slope instability (90550)
Jeffrey Obelcz, Coastal Studies Institute, Baton Rouge, LA, United States, Kehui Xu, Louisiana State University, Oceanography and Coastal Sciences, Baton Rouge, LA, United States, Samuel J Bentley, Louisiana State University, Baton Rouge, LA, United States, Chunyan Li, Louisiana State University, Department of Oceanography and Coastal Sciences, Baton Rouge, LA, United States, MIke D Miner, Bureau of Ocean Energy Management, U.S Department of Interior, New Orleans, LA, United States, Meg Cathlin O'Connor, Louisiana State University, Geology and Geophysics, Baton Rouge, LA, United States and Jiaze Wang, University of Maryland, Center for Environmental Science, Horn Point Laboratory, Cambridge, MD, United States
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