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 38 for “"Clear Water"”.
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Shape Perception of Clear Water in Photo-Realistic Images
… to investigate this using the perceived shape of water from stereo images using a real time stereoscopic 3-D depth gauge. The results suggest that people are able to consistently perceive shape of liquids from photo-realistic images and that regularity in underlying texture facilitates human …
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Using the movability number to model local clear-water scour in rivers
… The research, which focused exclusively on local clear-water scour at bridge piers, stemmed from previous works performed by Armitage & McGahey (2003) and Cunninghame (2005) in which the Movability Number approach was developed and assessed. Results from these studies indicated that there was …
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Stratification of Southern Georgia Streams For Rapid Bioassessment Focusing on Differences in Structure and Function of Black Water and Clear Water Streams
… streams and later on to form the index of stream water quality. Principal components analysis of the selected metrics showed that some of the blackwater reference streams and clearwater reference streams are randomly placed over the ordination space and a few of the black water reference streams …
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Flow and sediment movement in stepped channels
… in a laboratory channel for this purpose, and clear water flow, clear water scour, and sediment transport tests undertaken for a range of discharges and channel slopes. Three distinct flow regimes were observed for the clear water flow and clear water scour tests. They were stable tumbling …
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Population dynamics of Daphnia galeatat in the biomanipulated Bautzen Reservoir: life history strategies against food deficiency and predation
… in the pelagic zone of this highly eutrophic water. Major bottom-up and top-down factors were determined during the study period and analysed with regard to their influence on Daphnia dynamics and life history. Field data on fecundity and population structure of D. galeata were combined with …
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Composition and characteristics of particles in the ocean : evidence for present day resuspension
This study of particulate matter in the water column and the underlying surface sediments verifies the occurrence of local, present-day resuspension in the deep sea. The location of the major portion of this work was the South Iceland Rise, a region influenced by the flow of Norwegian Sea Overflow …
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Effects of Turbidity on Anti-Predator Response and Foraging Behavior in the Fountain Darter, Etheostoma fonticola
… stressors poses a significant threat to freshwater systems and is occurring on a global scale. The pervasive impacts of turbidity include degraded visual ability resulting in altered animal behavior. Anti-predator response and successful foraging ability, both essential elements of ecological …
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The palaeolimnological record of regime shifts in lakes in response to climate change
… study is focused on recent regime shifts between clear-water and turbid states in Lake Krankesjön in southern Sweden. We combined palaeolimnological records and limnological monitoring data, concentrating on the documented collapse of the clear-water state in 1975 and the subsequent recovery in …
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The role of phytoplankton in the nutrition of the larvae of the giant freshwater prawn Macrobrachium rosenbergii (DeMan) (Crustacea : Palaemonidae)
… reared in phytoplankton rich cultures and in clear water were examined to determine whether the phytoplankton had any effect on the composition of these lipids. As no overall significant differences were found in the lipid and fatty acid compositions of larvae reared in phytoplankton rich or …
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The Chinatown stories : investigating water (in)justice through transmedia urban design in the L.A. River
… river stretches and communities, lacks clear water justice objectives, and fails to adequately represent local stakeholders, and thus lacks the ability to actualize their vision. This thesis argues that the discipline and practice of urban design can use transmedia storytelling as a tool …
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Food Habits and Consumption Estimates of Walleyes Stocked as a Tool to Suppress Fathead Minnow Populations in West-Central Minnesota Wetlands
… wildlife habitat and food resources for waterfowl. The management of wetland ecosystems to exist in a clear-water, macrophyte-dominated state is desired by state and federal waterfowl biologists. Higher macrophyte biomass results in greater habitat complexity and increased food …
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The Effects of Seasonal Changes and Turbidity on Swimming Performance in White Crappie Pomoxis Annularis and Black Crappie Pomoxis Nigromaculatus.
… sediments. Black crappie predominate in clear bodies of water and exhibited significantly greater critical swimming speeds in clear water than did white crappie during spring days and winter nights. A significant reduction in critical swimming speed was observed in black crappie as …
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Hand powered portable ultraviolet sterilizing water bottle with active UV dose sensing
A portable hand powered water sterilization device was created to address a portion of the growing epidemic of global water contamination. As being more supply chain independent and having an active dose sensing component that monitors the water to insure sterilization, our device boasts far more …
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Food web regulation under different forcing regimes in shallow lakes
… alternative stable states. They are either in a clear-water or turbid state, where macrophytes and phytoplankton dominate, respectively. Both states can stabilize themselves through various mechanisms. These two alternative states and stabilizing mechanisms are integrated in the complex ecosystem …
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Milk dispenser for variable fat content
… dispensing valve. The prototype was tested using clear water in one tank, and colored water in the other to visually observe how well the product mixes. The final prototype was able to mix quite appropriate ratios with sufficient precision in milk fat ratios.
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Local scour at bridge piers
… of YO/D is reached, is similar to that for clear water scour as shown by Ettema (1980). A flow depth adjustment factor, K(YO/D), which is related to YO/D with D/d50 as the third parameter is presented which indicates to a designer the sequence of estimation of the effect of flow depth on the …
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Downstream suspended sediment dynamics of reservoir sediment flushing
… erosion in immobile coarse bed in running water condition was developed. The method proved to be the back bone of all fine sediment erosion experiments conducted in the present study and could be used for similar studies. This study presents a first work of direct measurement of erosion …
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Development of broodstock conditioning-, induced spawning-, and hatchery methods for the South African spotted grunter (Pomadasys commersonnii)
… induction was facilitated by finally increasing water temperature from 19 to 24 °C, and finally using Ovaprim® (gonadotropin-releasing hormone analogue [GnRHa]) as decapeptide (spawning inducer (0.25 mℓ/kg). The Ovaprim® was applied intramuscularly (IM) at only 50 % of the prescribe dose (0.5 …
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Diel and horizontal patterns in the densities of Bythotrephes, Chaoborus, and Leptodora in a Minnesota Reservoir
… Increases were likely driven by reduced water column net avoidance and nighttime diel vertical migration from a daytime refuge. Differences in nearshore to offshore density were variable, with marginally significant differences in the Bythotrephes distribution during the night (larger …
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