No description available.

Thesis (M.S. - Geology)--University of Arizona. / Includes bibliographical references.

Thesis--University of Missouri, School of Mines and Metallurgy, 1903. / Year degree was granted determined from "1874-1999 MSM-UMR Alumni Directory". The entire thesis text is included in file. Holograph [Handwritten and illustrated in entirety by author]. Title from title screen of thesis/dissertation PDF file (viewed November 13, 2008)

Thesis (PhD.)(Plant Production))--University of Pretoria, 2008. / Includes summary. Includes bibliographical references.

Thesis (M.S.)--Ohio State University, 1965. / Available online via OhioLINK's ETD Center

A dissertation submitted to the Faculty of Science, University of the Witwatersrand, Johannesburg, in fulfilment of requirements for the degree of Master of Science. 2014. / The aim of this dissertation was to determine the likely impacts that planting woodlands would have on the storage, transport and discharge of mine water and contaminants, over a plume originating from the West Complex tailings storage facility within the Vaal River mine lease. The hydrological model MIKE SHE was run on a grid comprising of 120m square cells, for a pre-woodland period from 2001 to 2010. Sulphate was used as an indicator of the contaminant plume concentrations and transport across the study area. Six future woodland planting scenarios (2025 to 2034) were then simulated to determine the effects of mature Searsia lancea, Eucalyptus dunnii and Tamarix usneoides, and different planting scenarios on the contaminant plume. Results indicated that planting these deep-rooted species will be effective in decreasing the groundwater levels, groundwater flux and the quantity of contaminants reaching the river. Before tree water and contaminant uptake can be further modelled with improved accuracy within MIKE SHE, the limitations of the use of only one contaminant uptake value for the vegetation needs to be overcome, so that different uptake rates among different tree species can be shown.

Thesis (Ph.D. (Biochemistry, Microbiology & Biotechnology)) - Rhodes University, 2007.

Thesis (M.S.)--West Virginia University, 2005. / Title from document title page. Document formatted into pages; contains xii, 100 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 74-77).

No description available.

There was a major discharge into Restronguet Creek, south-west Cornwall in January 1992 of metalled acidic mine water drainage from the recently closed Wheal Jane tin mine. Shortly after this discharge a post-impact study using the responses of Recent benthic foraminifera as indicators of metal pollution was carried out on this Creek which had not been investigated previously. Because of a lack of pre-discharge foraminiferal data from Restronguet Creek, other estuaries, which previously drained metal mining regions, have been sampled in order to determine the background levels in foraminiferal populations. These estuaries, Fowey (Cornwall), Avon and Erme (south-west Devon) have not been investigated previously. The research programme included reconnaissance sampling of the estuaries Looe, Yealm, Kingsbridge, Axe and Carrick Roads (south-west England), primarilly to determine the geographical distribution of the agglutinated species. In all, 651 samples were taken for micropalaeontological and laser analysis from which an estimated 260,000 tests have been picked and some 70 species identified. A further 395 samples were taken for metal, carbon, nitrogen, sediment grain size and mineralogical analysis. The results of this research show changes over time with the colonisation of barren stations, increased abundance of living individuals, reduced proportions of deformed tests, less severe acid dissolution of the test walls and a seasonal species distribution which is similar to that of the Fowey Estuary. Low diversity is unchanged and the agglutinating foraminifera, which form distinct assembage zones in the control estuaries, remain absent from Restronguet Creek. The data provided by the short cores from Restronguet Creek suggest that the 1992 discharge does not account for the absence of these species. During the period of investigation the sediment-bound metals in terms of the concentrations have, in general, increased but the river water quality entering the Creek has improved in terms of metals and acidity. This suggests that the foraminifera are more directly influenced by metals in solution and that tangible benefits have been gained from the water quality improvement programme inaugurated by the Environment Agency.