Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 30 for “"urban stream"”.
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Stormwater and organic matter in the urban stream continuum
… or mineralize it to CO<sub>2</sub>.</p><p>Urbanization is a widespread agent of landscape change that can alter DOM</p><p>regimes by changing the amount and types of organic matter in the catchment and</p><p>by changing the way that water moves through the landscape (transporting …
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Salmonids in an Urban Stream: Movement, Habitat, and Potential Barriers
… of different habitat types. Altered and degraded streams may restrict native salmonid use and access to habitat within or beyond urban areas. Locally, restoring native salmonids to streams in urbanized areas is of interest to recovery efforts. However, there is a lack of information in the …
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An ecological evaluation of an urban stream restoration in West Chicago, Illinois
The consistent rise in urban population and expansion of urban centers in the United States over the last several decades has led to the need for preservation of natural resources in those areas, as well as degradation to those resources. Streams in urban systems are often highly degraded and may …
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Investigating nitrate attenuation in an urban stream using stable isotope geochemistry and continuous monitoring
Urbanization affects in-stream biogeochemical processes that control nutrient export. Attempts to restore urban streams will not be successful unless the biological and physical controls on water quality are thoroughly understood. The objective of this study was to identify the relative influences …
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Impacts of legacy mining on stream structural and functional processes in an urban stream
… to improve the understanding of mine drainage in urban watersheds, specifically how neutral mine drainage (NMD) influences urban streams. Past research on both urban streams and mine impacted streams has largely focused on characterizing streams using structural approaches although there has been …
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Rediscovering the River Bièvre : the feasibility of restoring ecological functions in an urban stream
… numerous towns before disappearing into the urban hydraulic network upon its approach to Paris's dense urban core. Recent plans to restore the stream and uncover its buried sections outside of the core have lead to current plans to reintroduce the stream within Paris proper. Analysis of the …
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A Method for the Determination of Design Discharges for Urban Stream Restoration Projects in Northern Virginia
It is well documented that urbanization changes the hydrology of watersheds (Hammer 1972; Booth 1991; Rose and Peters 2001). Increases in runoff volume and velocity from urbanization result in stream channel degradation (Hammer 1972; Henshaw and Booth 2000; Walsh et al. 2005; Leopold et al. 2005a; …
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Determining the Effects of Water Quality on Stream Metabolic Function of Urban Stream Corridors in Columbus, Georgia
<p>Urbanization alters streams, disrupting their natural habitat and inducing changes in nutrient dynamics and primary productivity. These human-induced interventions diminish ecological structure, homogenizing once-diverse ecosystems and posing a risk of impairment or destruction. Continuous …
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Effect of a Water Treatment BMP on Nutrient Spiraling and Leaf Litter Breakdown in an Urban Stream
<p>Alterations to stream conditions caused by urbanization can compromise valuable ecosystem services, such as nutrient attenuation and carbon processing. A best management practice (BMP) water facility was installed to restore an impaired urban stream in Columbus, GA. This study was conducted to …
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Assessing the suitability for urban stream rehabilitation in Fort Collins based on watershed, hydrologic, and benthic macroinvertebrate indicators
Development in urban areas generally increases the proportion of a watershed that is covered by impervious surfaces. This added impervious area causes both the quantity and peak rate of stormwater runoff to increase thereby altering the natural flow regime in receiving streams and causing changes …
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A bio-indicator assessment towards the rehabilitation of the Stiebeuel River, Franschhoek, South Africa
Increased urbanization coupled with the effects of urban stream syndrome and urban informal settlements are degrading rivers and causing a decline in habitat integrity and the delivery of ecosystem services. There is a need to implement river restoration programmes to alleviate the negative impacts …
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Detection probabilities and local population demographics of fishes in urbanized and forested streams of the New River basin, Virginia
… to address the mechanisms of impairment in urban stream habitats. When estimating population-level parameters, incomplete detection of individuals must be accounted for to ensure unbiased estimates. In this thesis, I examined differences in the detection probabilities of stream fishes, and …
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Dissolved Organic Matter Characterization and Impact on Mercury Binding in an Urbanizing Watershed
… conducted on the Hg-DOM relationship within an urbanized river setting subjected to various anthropogenic sources. The various runoff and pollutant sources vary in DOM quality and character. Three sources of organic matter from the North Branch Park River (NBPR watershed in Hartford, CT (forest, …
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Land Use and River Systems: Impacts of Suburban Residential Development on Channel Stability and Water Supply, Oak Ridges Moraine, Southern Ontario
To better understand the impacts of suburbanization on rivers and with the sensitivity of the Oak Ridges Moraine in mind, this study examined the geomorphology and hydrology of streams running through small, primarily residential developments in the Humber River headwaters. Local scale impacts were …
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A Novel Manganese Oxidising Bacterium: Characterisation and Genomic Evaluation
… ring structures, termed anelli, present within urban stream biofilms. The results of this research are detailed within three chapters (Chapters 3 – 5). Chapter 3 addresses Aim 1: To investigate the occurrence of JOSHI_001, and like organisms, within urban freshwater systems; describing a field …
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Nitrogen biogeochemistry in Binghamton, NY, a medium-sized urban ecosystem
… elevated nitrogen levels are characteristic of urban ecosystems. The major reasons that N is higher in cities include imports of food, fuel and fertilizer. High N export from both point- and nonpoint-sources is common in large cities. While N cycling has been studied in large urban areas, less …
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Influence of nature preserves on macroinvertebrate assemblages, water quality, and habitat quality along two urban streams
The increase in urbanization as a threat to aquatic ecosystems, particularly stream ecosystems, is of growing concern due to the reliance of the condition of surrounding watersheds. Mitigation techniques, such as riparian re-planting and habitat enhancement, are often met with little improvement in …
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Effect of Urbanization on the Hyporheic Zone: Lessons from the Virginia Piedmont
… population shifts toward living in cities, urbanization and its deleterious effects on the environment are a cause of increasing concern. The hyporheic zone is an important part of stream ecosystems, and here we focus on the effect of urbanization on the hyporheic zone from ten …
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Investigating the Role of Long Distance Dispersal in the Response of Stream Fishes to Urbanization
… study in two watersheds differing in urban impact in order to assess the role that long distance dispersal plays in the response of tolerant stream fishes to urbanization. Our two stream sites included a heavily impacted urban stream (watershed impervious surface cover ~30%) and a …
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