Thesis (Ph.D.) - University of Queensland, 2004. / Includes bibliography.

published_or_final_version / Geography and Geology / Master / Master of Philosophy

Abstract The goal of this study is to infer the nature of suspended particles from settling, advection, and resuspension processes. Previous studies have not shown that the influence of physical and biogeochemical nature on the behavior of suspended particles. Therefore we expect to observe differential hydrodynamic behavior of suspended particles of different nature in the study. The size distribution of suspended particles is a variable of sediment transport. Size and density, which play a major role in distribution of particles through the water column, are two of primary factors in determining the settling velocity of suspended particles. The sites of the field experiments were located on the Kao-ping Shelf and Kao-ping Submarine Canyon in Southern Taiwan in order to observe resuspension and settling processes. The field experiments were conducted to deploy moored instruments at the two study sites for collecting the time series data. The experiments also included profiling of temporal and special particle and hydrographic parameters along the Kao-ping Submarine Canyon using R/V Ocean Researcher III. In this study we employed a multidisciplinary approach to the study of suspended particles on a plainer inner shelf and sinuous submarine canyon. Base on the observations on the Kao-ping Shelf, the concentration of coarse-grained suspended particles near the bottom was greater than near the surface, and the fine-grained suspended particles was greater near the surface than the bottom. Coarse-grained suspended particles had better correlation with salinity of which nonlithogenic matters were the primary constituents. Fine-grained suspended particles, which consist mainly of lithogenic matters, were affected more by the current. Initial analysis of the data showed that local current speed controlled the distribution of different sizes particles. When strong currents were present, there were more coarse-grained suspended particles. Conversely, there were more fine-grained suspended particles. Regarding the temporal and special observations in the Kao-ping Submarine Canyon, the concentration of suspended particles increased with depth. The compositions of suspended particles measured by LISST-100 and water samples in the submarine canyon showed opposite trends. It revealed that different methods lead to different results. The two sediment trap arrays deployed in submarine canyon were influenced by oscillatory tidal currents. In spring tide there was high concentration of settling particles, which is composed of nonlithogenic materials. Suspended particles in the lower part of the submarine canyon did not all come from the upper part of the canyon but were transported by strong tidal currents to the observed site. The distributions of different sizes particles were the result by different hydrodynamic behavior due to nature of particles. Oscillatory tidal currents could affect the transports of suspended particles from the Kao-ping continental shelf to the Kao-ping Submarine Canyons.

Thesis (Ph. D.)--Lehigh University, 2000. / Includes vita. Includes bibliographical references (leaves 88-97).

Thesis (M.S.)--Oregon State University, 2002. / Typescript (photocopy). Includes bibliographical references (leaves 62-64). Also available on the World Wide Web.

Multiple parameters were monitored during an 18-month period in two karst groundwater basins in Woodford County, Kentucky, in order to assess the effects of land use on water quality. Blue Hole Spring drains a primarily urban area, whereas spring SP-2 drains an agricultural area. Water-quality parameters were monitored manually weekly or biweekly, as well as more frequently during storms. Discharge (Q), temperature (T), specific conductance (SC), and turbidity were continuously monitored and logged at 15-minute intervals. It is hypothesized that pathogen and sediment concentrations would be lower at SP-2 than at Blue Hole Spring due to differences in land use between basins. Average Q was greater at Blue Hole than at SP-2, and SC values were greater at Blue Hole than at SP-2 for 70 of 71 sample sets. During two monitored storms, as Q increased, SC decreased and turbidity increased. Biweekly Blue Hole fecal coliform (FC), total coliform (TC), and atypical colonies (AC) values averaged 160, 3,600, and 40,000 cfu/100 mL, respectively, and fluctuated more than at SP-2. Biweekly SP-2 FC, TC, and AC values averaged 130, 2,000, and 8,300 cfu/100 mL, respectively. Biweekly values for AC/TC averaged 14.29 at Blue Hole and 6.27 at SP-2. AC/TC ratios were greater at Blue Hole than at SP-2 for 29 of 31 biweekly sample sets. There is a statistically significant difference between the biweekly data sets from the two sites, as well as between data collected under WET and NORMAL flow conditions at each site. Male-specific coliphage (MSP) was detected in most samples collected from Blue Hole, but was never detected at SP-2. Given the proximity of the basins, differences in water quality appear to reflect differences in land use, as hypothesized. Results were similar to other studies in the Inner Bluegrass region. For both Blue Hole and SP-2, wet weather was associated with changes in certain parameters. This study has also shown that the AC/TC ratio appears to be a valid tool for determining the source of contamination within karst ground-water systems as well as in surface water.

Thesis (M.S.)--Northwest Missouri State University, 2005. / The full text of the thesis is included in the pdf file. Title from title screen of full text.pdf file (viewed on January 25, 2008) Includes bibliographical references.

Thesis (M.S.)--Montana State University--Bozeman, 2008. / Typescript. Chairperson, Graduate Committee: James W. Bauder. Includes bibliographical references (leaves 51-55).

Thesis (Ph. D.)--University of Washington, 1997. / Vita. Includes bibliographical references (leaves [116]-121).

Thesis (M.S.)--University of Nevada, Reno, 20007. / "December 2007." Includes bibliographical references (leaves 122-124). Library also has microfilm. Ann Arbor, Mich. : ProQuest Information and Learning Company, [2008]. 1 microfilm reel ; 35 mm. Online version available on the World Wide Web.