Thesis (Ph.D.)--Brigham Young University. Dept. of Biology, 2007. / Includes bibliographical references (p. 31-41).

Honors Thesis (Biology)--Oberlin College, 2008. / "Spring 2008." Includes bibliographical references (leaves 42-50).

Thesis (M.S.)--Ohio State University, 2005. / Includes bibliographical references (leaves 38-42). Available online via OhioLINK's ETD Center

Thesis (M. S.)--Civil and Environmental Engineering, Georgia Institute of Technology, 2010. / Committee Member: Pavlostathis, Spyros; Committee Member: Spain, Jim; Committee Member: Tezel, Ulas. Part of the SMARTech Electronic Thesis and Dissertation Collection.

Thesis (M.S.)--East Tennessee State University, 2003. / Abstract. Includes bibliographical references (leaves 109-116). Also available full text as a .pdf file via the Internet. Requires Adobe Acrobat Reader software.

Thesis (M.S.)--Ohio State University, 1986. / Includes bibliographical references (leaves 102-106). Available online via OhioLINK's ETD Center

No description available.

Thesis (M.S.)--Kent State University, 2008. / Title from PDF t.p. (viewed Oct. 27, 2009). Advisor: Laura Leff. Keywords: Phragmites australis; Scirpus cyperinus; glyphosate; microbes; ergosterol; invertebrates. Includes bibliographical references (p. 47-59).

The purpose of this thesis research was to understand the recovery and resilience of wetland-community to flash flood disasters and its associated risks in the north-eastern part of Bangladesh. I conducted my study using a case study approach following an interdisciplinary research paradigm. It was found that wetland-community is extremely vulnerable to flash flood hazards - both in biophysical and social terms. However, they possess certain coping thresholds, and are resilient to disaster losses. The adaptive capacity of the local communities has been severely curbed by a number of socio-ecological, economic, and political factors, leading to natural resource degradation, marginalization and exclusion of the poor from common pool resources by powerful groups. Response capacities of local institutions were severely constrained by their limited relative autonomy. For building resilience, i) effective management and access of the poor to natural resources, and ii) enhancing autonomy of local institutions are required. / February 2016

The hydrology of the Kudumela Wetland, Limpopo Province of South Africa was studied from November 2005 to April 2007, involving both fieldwork and laboratory analyses. This study presents the results of an investigation of the hydrology of the Kudumela Wetland in South Africa, and its contribution to dry season flow in the Mohlapitsi and Olifants Rivers. Initially, 40 Piezometers were installed along seven transects and water levels monitored in order to understand water table level characteristics (fluctuations) with time. Water levels in transects one, three, the right bank portion of transect four and transect six showed fluctuations. Transect two, the left bank portion of transect four and transect five did not show significant temporal changes. The relationships between piezometer water levels, rainfall in the study area and stream flow observed at a river gauging station are not clear. The river within the wetland is a gaining stream because the water table level elevation is above that of the river. This indicates that the wetland is feeding the river. The northern part of the wetland (T1 and T2) is affected by artificial drains and most of the piezometers closest to the river channel showed the lowest variations. The relationships between rainfall, groundwater, and surface water at this site shows that stream flow did not respond quickly to precipitation as expected, even in months when rainfall increased (for example, 74 and 103mm during 08/02/06 and 18/02/06 respectively), and the groundwater levels did not show fluctuations, indicating that groundwater responds gradually to precipitation, and that the relationship between rainfall, groundwater and surface water is complex. The environmental stable isotopes (deuterium and oxygen-18) and the radioactive isotope (tritium) were analyzed, along with field observations of electrical conductivity (EC), pH, total alkalinity (Talka) and some major and minor dissolved ion analyses for tracing water dynamics in the study area. A total of 39 water samples was taken and analyzed from boreholes, auger holes, right bank and left bank drains, various points along the river and springs in four sampling visits to the wetland. The results did not clearly provide a temporal record of isotope and chemical variations in the various sources. Results from the most extensive sampling survey in April 2007 provide the most comprehensive overview of hydrological relationships. Clustering of the stable isotope data suggests that the water samples of upstream and downstream river, auger holes further south and most drains clustered together suggesting a common water source and almost all samples fall above the global (GMWL) and local (Pretoria MWL) meteoric water lines, while some fall between the global and Pretoria meteoric water lines. Six representative water samples were analyzed for major ion concentration. Both cation (Ca, Mg, K, and Na) and anion (HCO3, SO4, Cl, and NO3) analyses in November 2007 confirmed conclusions reached from field observations. The analysis shows that a single type of water (Ca, Mg-HCO3) is involved in the study area. In almost all major ion plots, the right bank drains, upstream river and downstream river samples grouped together in a single cluster. As the means for reliable river flow measurements were not available, except for the gauging station at the outlet of the valley, rough, semi-quantitative estimates were made during several field visits. These, suggest considerable losses of river flow into the gravel/boulder beds at and below a gabion dam at the head of the valley. Three major and several other left bank springs and right bank drains at transects T1 and T2 contributed to the river flow at all times. Along with the isotopic and chemical evidence, these observations have lead to a hypothesis that river water enters the wetland and flows back to the Mohlapitsi River through boulder beds underlying the wetland and through drains on the surface of the argillaceous aquitard covering the more conductive boulder beds. Deeper dolomitic groundwater does not appear to contribute to the water balance at least in the northern half of the wetland. Although environmental isotope and hydrochemistry results may not unequivocally prove this hypothesis they do not contradict it.