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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Preliminary Measurement of Submarine Groundwater Discharge in Taiwan

Lin, Yi-jie 10 September 2007 (has links)
A preliminary study shows that Submarine Groundwater Discharge (SGD) exists around Taiwan even though groundwater overdrawing is serious. Only five of the 20 sites studied did not record any SGD signal. Two nearly fresh SGD samples were obtained, providing strong and direct evidence for the existence of SGD in Taiwan. SGD is the submarine seepage of all fluids from coastal sediments into the overlying coastal areas. It has been well documented that SGD may contribute much nutrients to the coasts (Burnett et al.,2001, 2003; Church, 1996; Taniguchi et al., 2002; Zhang and Satake, 2002). Because of its difficulty in measurement, there are few reports on the characteristics of groundwater seepage, such as the flow rate and the water chemistry. In Taiwan, the only report was published in the Japanese journal Geochemistry (Chen et al. , 2005 ). In this study, samples were collected monthly from May, 2004 to June, 2006 at Xiziwan and Caishan in Kaohsiung. A flux chamber was also used in the observation of the SGD seepage rates. Further, samples were collected from 20 different places around Taiwan. The SGD collecting device, the SGD-Flux chamber and the Lee type seepage meter (Zhang et al., 2005) were used in this study, the latter being the first time used to explore the SGD flux in Taiwan. Salinity, dissolved oxygen saturation (%), nutrients (NO3, NO2, PO4, SiO2, NH3), total alkalinity, pH and major ions were analyzed. We averaged all seepage rate data at Xiziwan and Caishan to estimated the SGD seepage rate at about 1.32¡Ó1.57 L/m2/hr. The average concentrations of inorganic nitrogen (NO3+NO2+NH3), PO4 and SiO2 are, respectively, 48.6¡Ó86.3 (n=85), 0.78¡Ó1.26 (n=110) and 55.1¡Ó39.8
2

TEMPORAL VARIABILITY OF RIVERBED HYDRAULIC CONDUCTIVITY AT AN INDUCED INFILTRATION SITE, SOUTHWEST OHIO

Birck, Matthew D. 04 August 2006 (has links)
No description available.
3

Investigating Riverbed Hydraulic Conductivity at Several Well Fields Along the Great Miami River, Southwest Ohio

Wojnar, Alicja Jolanta 12 August 2008 (has links)
No description available.
4

The Fate of Nutrients in Two Coastal Freshwater Systems

Knights, Deon Hanley January 2020 (has links)
No description available.

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