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.
Results
Showing 1 to 16 of 16 for “"internal loading"”.
-
Hypolimnetic Oxygenation Mitigates the Effects of Nutrient Loading on Water Quality in a Eutrophic Reservoir
… metals and nutrients from the sediments, i.e., internal loading, while storms can increase external nutrient loading to a waterbody. One potential solution for combating hypoxia is to use side stream supersaturation (SSS), a novel form of hypolimnetic oxygenation. First, in Chapter 1, I tested …
-
Eutrophication Assessment for Lyndon B. Johnson Lake, a Subtropical Reservoir in Central Texas: Impacts from Urbanization and Upstream Sources
… in the hypolimnion. These conditions resulted in internal loading of nitrogen and phosphorus. At the other stations, the seasonal development of water column stability was weakened or completely inhibited during periods of heavy spring or summer flooding. There was an increase in developed land …
-
Characterizing water quality, nutrients, and dissolved oxygen dynamics in four Lake Ontario coastal wetlands
… yet their role in regulating nutrient loadings to receiving waters remains unclear. Over a decade of monitoring by the Toronto and Region Conservation Authority revealed that four wetlands (Rouge Marsh, Duffin’s Marsh, Carruthers Marsh, and Frenchman’s Bay) vary as net sinks or sources …
-
The Applied Phycology and Biochemistry of Managed Reservoirs in the East of England
… investigate biodiversity, eutrophication, and internal sediment dynamics driving the succession of harmful algal blooms. These studies were designed to provide a baseline assessment of climate stressors in the East of England, identify potential risk, and address management strategies and …
-
Structure and evolution of the Australian continent : insights from seismic and mechanical heterogeneity and anisotropy
… isostasy. I investigate the importance of internal loading, the directional anisotropy of the gravitational response to loading, and the estimation bias affecting the long wavelengths of the coherence function. I develop a method for non-stationary coherence analysis which enables a …
-
The sources and fates of nutrients in the Deep Lake watershed
… nitrogen, phosphorus, and total suspended solids loading at study sites that received frequent cattle activity. It also helped to determine the presence of internal loading occurring in the anoxic hypolimnion that was present during the summer and late fall. These results allow for the development …
-
Thermal mass performance in residential construction : an energy analysis using a cube model
… parameters with accurate climate data and internal loading assumptions. The model first addresses the notion as to whether building simplification is a valid means of analysis through a calibration and validation study. Then, the model is used to address three research areas on passive …
-
Computational Modal Analysis of Prestressed Half Scale Generic Business Jet Substructures
… for pre-stress to determine the significance of internal loading. These results revealed that pre-stress was only significant in one of the substructures. Furthermore, pre-stress effects were found to only be significant when skin resonant modes were present. A unique model updating technique was …
-
Organic Phosphorus Dynamics and Contributions to Eutrophication in a Shallow, Freshwater Bay
… through terrestrial (external) or sedimentary (internal) loading, may disrupt this balance causing blooms of phytoplankton to flourish, often resulting in harmful environmental and anthropogenic consequences. Accordingly, reduction of external P loading has been commonly implemented with a …
-
Investigating the distribution of Nitellopsis obtusa in Ontario Lakes and its role as an ecosystem engineer
… = 0.59, p-value < 0.001), which likely promoted internal loading of phosphorus. Supporting this conclusion was a strong predictive model showing that N. obtusa biomass explained 90% of pore water soluble reactive phosphorus concentrations (R2 = 0.90, p-value < 0.001). During a narrow sampling …
-
An Ecological Approach to Feed Management in Fish Rearing Ponds
… of 2009–2011, and were apparently driven by internal loading from sediments after establishment of cyanobacterial blooms during late spring. Because flushing ponds failed to improve water quality, St. Marys hatchery managers no longer use this production strategy during summer months (Chapter …
-
EXPLORATION OF NEW MAGNETOCALORIC AND MULTIFUNCTIONAL MAGNETIC MATERIALS
… with Gd ions introduced into the CNT openings by internal loading with an aqueous GdCl3 chemical process. In the current work, the magnetic properties of the CNT/Gd composites were obtained by the joining and annealing of Gd metal and CNTs at 850 °C for 48 h. Energy dispersive X-ray analysis shows …
-
Composition and bioavailability of DOC across a rural-urban gradient
… and, I.4 g O₂m⁻² day⁻¹ respectively), external loading of oxygen demanding organic material is responsible for the episodic deoxygenation of the water column that is often observed in Torrens Lake following rain events. Furthermore, although internal loading of filterable reactive phosphorus …
-
Speciation and dynamics of phosphorus in relation to lake restoration methods
… of a modified zeolite mineral (Z2G1) to reduce internal nutrient loading. This study examines water column and sediment nutrient dynamics; focusing on phosphorus (P) and the ecosystem response to lake restoration designed to reduce levels of P. Trends in P concentrations in Lake Okaro were …
-
Restoring freshwater quality: an integrated environmental, economic and ecosystem services assessment of reducing nutrient loads to Lake Rotorua
… limiting nutrient loss from land, and reducing internal loading of the lake through engineering solutions. The aim of the research here was to analyse historical management responses and current management options alongside economic values of the lake and the catchment. The interdisciplinary …