Modeling suspended sediment transport under combined wave current actions in Indian River Lagoon

STANDARD VIEW

MARC VIEW


	Permanent Link:	http://ufdc.ufl.edu/UF00075316/00001

Material Information
	Title:	Modeling suspended sediment transport under combined wave current actions in Indian River Lagoon
	Physical Description:	xii, 234 leaves : ill. ; 29 cm.
	Language:	English
	Creator:	Sun, Detong, 1965- ( Dissertant ) Sheng, Y. P. ( Thesis advisor ) Dean, Robert G. ( Reviewer ) Mehta, Ashish J. ( Reviewer ) Thieke, Robert J. ( Reviewer ) Reddy, Dr. ( Reviewer ) Motz, Dr. ( Reviewer )
	Publisher:	University of Florida
	Place of Publication:	Gainesville, Fla.
	Publication Date:	2001
	Copyright Date:	2001

Subjects
	Subjects / Keywords:	Coastal and Oceanographic Engineering thesis, Ph.D ( lcsh ) Dissertations, Academic -- Coastal and Oceanographic Engineering -- UF ( lcsh )
	Genre:	bibliography ( marcgt ) theses ( marcgt ) non-fiction ( marcgt )
	Spatial Coverage:	United States--Florida--Indian River Lagoon

Notes
	Abstract:	Aquatic systems that have received nutrient loads for long periods of time accumulate nutrients in bottom sediments. These sediments become a potential source of nutrients to the overlying water column. Sediment bound nutrients can then be released through mineralization of organic matter, followed by resuspension and diffusion of nutrients into the water column. Sediment transport processes are one of the controlling factors in these sediment-nutrient cycles. Accurate understanding of the sediment transport processes is, therefore, very important for water quality studies in the aquatic systems. The Indian River Lagoon (IRL) is a unique estuary of national significance providing home to more than 4300 kinds of plants and animals. However, in recent years, increased population along the shoreline of the IRL and its surroundings has stained its natural resources. The stress caused by the population growth and associated activities have increased total suspended solids (TSS) and nutrient loadings into the lagoon, which have led to poor water quality. In this study, sediment samples have been collected and analyzed in laboratory to obtain sediment parameters such as size distributions, settling velocities, critical shear stresses and erosion rate constants. Four episodic events were conducted during 1997 to 2000 to study sediment resuspension n the IRL, during which waves, currents, water levels, TSS and water quality data were collected. Twelve synoptic events were conducted between April 1997 and May 1998, during with TSS, salinity, and other water quality data were collected at 45 stations. Results of the episodic experiments showed that significant sediment resuspension occurred during these events. To quantitatively study suspended sediment transport in the IRL, a two-group suspended sediment transport model has been developed, in which suspended sediments were categorized into two size groups: a fine group with sediment size less that 62 microns and a coarse group with sediment size larger than 62 microns. Coupled with the CH3D hydrodynamic model, originally developed by Sheng (1986, 1989( and the SMB wave model, the sediment transport model is successfully calibrated with field data. Applications of the model of the IRL successfully simulated the episodic and synoptic events. Results showed that: (1) Resuspension and deposition processes were realistically formulated in the wave model with sufficient accuracy. (2) The internal loadings (sediments resuspended from the bottom) were dominant during the episodic events while for longer term (1 year or longer) the external loadings (sediments from river run-offs and other external sources) were more important. (3) Waves played a very important role in sediment resuspension in the IRL.
	Thesis:	Thesis (Ph.D.)--University of Florida, 2001.
	Bibliography:	Includes bibliographical references (leaves 221-233).
	Statement of Responsibility:	by Detong Sun.
	General Note:	Printout.
	General Note:	Vita.
	Funding:	Technical report (Universtiy of Florida. Coastal and Oceanographic Engineering Dept.) :

Record Information
	Bibliographic ID:	UF00075316
	Volume ID:	VID00001
	Source Institution:	University of Florida
	Holding Location:	University of Florida
	Rights Management:	All rights reserved, Board of Trustees of the University of Florida
	Resource Identifier:	aleph - 002789914 oclc - 49241355 notis - ANR8097

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0	sobekcm_page_globals.constructor	Application State validated or built
0	sobekcm_database.verify_item_lookup_object
0	sobekcm_page_globals.constructor	Navigation Object created from URI query string
0	sobekcm_database.verify_item_lookup_object
0	sobekcm_page_globals.display_item	Retrieving item or group information
0	sobekcm_page_globals.get_entire_collection_hierarchy	Retrieving hierarchy information
0	sobekcm_assistant.get_entire_collection_hierarchy
0	cached_data_manager.retrieve_item_aggregation
0	cached_data_manager.retrieve_item_aggregation	Found item aggregation on local cache
0	item_aggregation_builder.get_item_aggregation	Found 'all' item aggregation in cache
0	system.web.ui.page.page_load (ufdc.page_load)
0	sobekcm_page_globals.constructor.on_page_load
0	html_echo_mainwriter.add_style_references	Adding style references to HTML
0	html_echo_mainwriter.add_text_to_page	Reading the text from the file and echoing back to the output stream
25	html_echo_mainwriter.add_text_to_page	Finished reading and writing the file

MILLISECOND

CLASS.METHOD

MESSAGE

sobekcm_page_globals.constructor

Application State validated or built

sobekcm_database.verify_item_lookup_object

sobekcm_page_globals.constructor

Navigation Object created from URI query string

sobekcm_database.verify_item_lookup_object

sobekcm_page_globals.display_item

Retrieving item or group information

sobekcm_page_globals.get_entire_collection_hierarchy

Retrieving hierarchy information

sobekcm_assistant.get_entire_collection_hierarchy

cached_data_manager.retrieve_item_aggregation

Found item aggregation on local cache

item_aggregation_builder.get_item_aggregation

Found 'all' item aggregation in cache

system.web.ui.page.page_load (ufdc.page_load)

sobekcm_page_globals.constructor.on_page_load

html_echo_mainwriter.add_style_references

Adding style references to HTML

html_echo_mainwriter.add_text_to_page

Reading the text from the file and echoing back to the output stream

html_echo_mainwriter.add_text_to_page

Finished reading and writing the file