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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

An investigation into the controls of overland flow generation

Bosworth, D. January 1987 (has links)
No description available.
2

True wayfaring Christians: form and meaning in the Overlander narratives

Sawadsky, Joanne Marie January 1976 (has links)
The basic contention of this thesis is that the journals and memoirs of a famous Canadian expedition—that of the "Overlanders" to the Cariboo gold fields in 1862—have literary as well as historical value. The accounts may be read as autobiographies, or as classic adventure stories (romances). The first chapter seeks to define the criteria by which we "judge literary worth in these two forms, and indicate in;: general terms how the Overlander narratives fit into both genres. The second chapter is concerned with dramatic structure in the narratives. The plot, reduced to its simplest form, is seen to be essentially that of the traditional folk tale ("naive" romance), in which heroes ride off in search of fabulous treasure, and on the way must overcome a variety of staggering difficulties. Although the outline of the plot in the Overlander accounts was supplied by actual events, the authors' ability to recognize the drama and reproduce it effectively is evidence of their creative power. The third chapter examines the diction, sentence structure, and imagery of each of the narrators. Their artistry and originality is perhaps more apparent in their style than in any other aspect of their writing. The fourth and fifth chapters concentrate on autobiographical meaning in the accounts. This meaning is developed as the travellers are shown striving to maintain harmony among themselves, and struggling to make progress in a sometimes hostile wilderness. All the narrators were Christian believers. Their religious vision was reaffirmed in the course of the trek, and broadened and deepened by their experiences. This vision and the process of its expansion, re-created by the authors, provide unity and a sense of progression for their works. In the final chapter, an attempt has been made to place the Overlander narratives in the context of the Canadian literary tradition. They belong to a large body of early travellers' and explorers' narratives which are full of fascinating details and curious anecdotes, and possess drama, poetry, and psychological interest, but which are just beginning to be recognized as genuine and valuable imaginative literature. Even after the fairly extensive analysis which can be made in a study of this length, it does not seem possible to state exactly how much literary value exists in works which are as little known as these, especially since what is true . of one or several may not be true of all the narratives. This examination does indicate, however, that these accounts taken as a whole possess both form and meaning and will give almost any reader pleasure on many levels. / Arts, Faculty of / English, Department of / Graduate
3

[The overland immigration to California in 1841,

Brereton, George Harold. January 1900 (has links)
Thesis (M.A.)--University of California, May 1926. / Title-page wanting; title from copy in the University of California library. Lettered on spine: Overland to California in 1841. Bibliography: 6 leaves at end.
4

Soil-erosion modelling at the global scale using remote sensing and GIS

Zhang, Xiaoyang January 1999 (has links)
No description available.
5

Microbial Activity in "Overland Flow" Industrial Waste Treatment

Eubanks, Elizabeth R. 08 1900 (has links)
One of the major problems of modern industries concerns the disposal of waste materials without the concomitant pollution of the environment. Several food and wood products industries have solved this problem by using the "overland flow" method of waste treatment. The research described in this paper was undertaken to ascertain the fact that the waste purification occurring on the disposal field is the result of microbial activities in the soil, and to study the transformations taking place.
6

Microtopography-Dominated Discontinuous Overland Flow Modeling and Hydrologic Connectivity Analysis

Yang, Jun January 2014 (has links)
Surface microtopography affects a series of complex and dynamic hydrologic and environmental processes that are associated with both surface and subsurface systems, such as overland flow generation, infiltration, soil erosion, and sediment transport. Due to the influence of surface depressions, overland flow essentially features a series of progressive puddle-to-puddle (P2P) filling, spilling, merging, and splitting processes; and hydrologic systems often exhibit threshold behaviors in hydrologic connectivity and the associated overland flow generation process. It is inherently difficult to realistically simulate the discontinuous overland flow on irregular topographic surfaces and quantify the spatio-temporal variations in dynamic behaviors of topography-dominated hydrologic systems. This dissertation research aims to develop a hydrologic model to simulate the discontinuous, dynamic P2P overland flow processes under the control of surface microtopography for various rainfall and soil conditions, and propose new approaches to quantify hydrologic connectivity. In the developed P2P overland flow model, the depressions of a topographic surface are explicitly incorporated into a well-delineated, cascaded P2P drainage system as individual objects to facilitate the simulation of their dynamic behaviors and interactions. Overland flow is simulated by using diffusion wave equations for a DEM-derived flow drainage network for each puddle-dominated area. In addition, a P2P hydrologic connectivity concept is proposed to characterize runoff generation processes and the related spatio-temporal dynamics. Two modified hydrologic connectivity indices, time-varying connectivity function and connectivity length of the connected areas and ponded areas, are proposed to quantitatively describe the intrinsic spatio-temporal variations in hydrologic connectivity associated with overland flow generation. In addition, the effects of DEM resolution, surface topography, rainfall distribution, and surface slope on hydrologic connectivity are also evaluated in this dissertation research. The developed model can be applied to examine the spatio-temporally varying P2P dynamics for hydrologic systems. This model provides a means to investigate the effects of the spatial organization/heterogeneity of surface microtopography, rainfall, and soil on overland flow generation and infiltration processes. In addition, the two proposed hydrologic connectivity indices are able to bridge the gap between the structural and functional hydrologic connectivity and effectively reveal the variability and the threshold behaviors of overland flow generation. / National Science Foundation under Grant No. EAR-0907588 / Department of Civil and Environmental Engineering, North Dakota State University / North Dakota Water Resources Research Institute
7

Characterization of Surface Microtopography and Determination of Hydrotopographic Properties

Chi, Yaping January 2012 (has links)
Spatial characterization of surface microtopography is important in understanding the overland flow generation and the spatial distribution of surface runoff. In this study, fractal parameters (i.e., fractal dimension D and crossover length l) and three hydrotopographic parameters, random roughness (RR) index, maximum depression storage (MDS), and the number of connected areas (NCA), have been applied to characterize the spatial complexity of microtopography. Clear and meaningful relationships have been established between these parameters. The RR was calculated as the standard deviation of the processed elevation, and the fractal parameters were calculated with the semivariogram method. The puddle delineation program was applied in this study to spatially delineate soil surface and to accurately determine MDS and NCA. It has been found that fractal parameters can better characterize surface microtopography. More importantly, fractal and anisotropic analyses can help to better understand the overland flow generation process.
8

Quantitative Aspects of the Microflora of an Overland Flow Spray Irrigation Sewage Disposal System

Jones, Rebecca 05 1900 (has links)
It was the purpose of this investigation to attempt to quantitate the microflora of the fields which receive the effluent from the Campbell Soup Plant, Paris, Texas, and to determine whether or not there is a correlation between the numbers and types of organisms present and the efficiency of purification of the system.
9

PERTURBATIONS ALONG HEADCUT AND THEIR EFFECTS ON GULLY FORMATION

DEY, Ashis Kumar, KITAMURA, Tadanori, TSUJIMOTO, Tetsuro 05 1900 (has links)
No description available.
10

Phosphorus transfer from land to water In pasture-based grazing systems

Nash, David Martin January 2002 (has links) (PDF)
Nutrient exports, in particular phosphorus, are a major problem for Gippsland and many other regions of the world. This thesis investigates the export of phosphorus in overland flow from pasture-based grazing systems in south-eastern Australia. Initially, field-scale monitoring is used to investigate the forms of phosphorus in overland flow with a view to identifying the primary mobilisation process. It is shown that from a well-managed pasture, phosphorus was primarily mobilised as a result of dissolution rather than physical detachment (erosion) processes. Phosphorus in the overland flow is shown to be predominantly in the dissolved reactive form (DRP). It follows that remedial strategies that rely on physically trapping phosphorus entrained in overland flow (i.e. buffer strips and riparian zones) are unlikely to be effective. The field-scale monitoring data are then used to investigate the structure of phosphorus exports. It is shown that the data conforms to a base-plus-increments model. It is proposed that phosphorus exports can be divided into a base or systematic component that results from a particular land use management system, and an incremental or incidental (preventable) component that is the result of particular management decisions, activities or incidents. (For complete abstract open document)

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