Thesis (Ph. D.)--Colorado State University, 2004. / Includes bibliographical references.

Thesis (M.S.)--Oregon State University, 2000. / Typescript (photocopy). Includes bibliographical references (leaves 58-64). Also available on the World Wide Web.

Thesis (M.S.)--Oregon State University, 1994. / Typescript (photocopy). Includes bibliographical references (leaves 67-70). Also available via the World Wide Web.

Thesis (M.S.)--Oregon State University, 1996. / Typescript (photocopy). Includes bibliographical references (leaves 65-70). Also available on the World Wide Web.

Thesis (M.Sc.)--York University, 2008. Graduate Programme in Geography. / Typescript. Includes bibliographical references (leaves 123-128). Also available on the Internet. MODE OF ACCESS via web browser by entering the following URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:MR51594

Thesis (MS)--University of Montana, 2008. / Title from author supplied metadata. Contents viewed on May 16, 2010. Includes bibliographical references.

Thesis (M.S.) University of Missouri-Columbia, 2004. / The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file viewed on (June 30, 2006) Vita. Includes bibliographical references.

Thesis (M.S.)--Oregon State University, 2007. / Printout. Includes bibliographical references (leaves 94-99). Also available on the World Wide Web.

Thesis (Ph.D.)--Pennsylvania State University, 2006. / Mode of access: World Wide Web.

This study uses a fieldwork-modelling research methodology to investigate hydrological pathways and chemical transport in floodplains and riparian zones, which occupy a key position in the landscape at the catchment-river interface. A numerical model is developed (ESTEL2D-SUBIEF2D) that is capable of modelling subsurface water and chemical movement at a high spatial and temporal resolution. The model is used in conjunction with data from two field sites (a lowland floodplain on the River Severn, UK, and a headwater riparian zone on Sleepers River, USA), and with hypothetical tracers, to quantify the effect of a range of factors on the operation of hydrological and biogeochemical processes in floodplain systems. This study shows the relative importance of river and hillslope inputs of water and chemicals to the floodplain, and how the scale of hydrological event (overbank flow, bankfull flow and low flow) affects the interaction of these sources. For example, in the case of an overbank flood event, hillslope inputs can be held back by the steep hydraulic gradient induced by flood water for up to 10 days. A comparison of headwater and lowland floodplains is attempted for the first time and indicates that different hydrological processes operate in these two environments. This implies that results from existing smaller scale riparian zone studies cannot simply be 'scaled up' to larger, lowland floodplain zones. The operation of the denitrification process within the floodplain is investigated as a relevant example of the more general transport modelling capability of the numerical code. This supports and extends the results of previous studies which have suggested that denitrification in the floodplain may be fundamentally limited by the interaction of hydrological processes and carbon availability. This comprehensive exploration of the full range of subsurface flow pathways through the floodplain highlights the importance of an understanding of hydrological pathways as critical to understanding chemical transport within the floodplain system.