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Showing 1 to 20 of 39 for “"Secchi"”.
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Landsat Trophic State Assessment of Fellows Lake
… computed for chlorophyll a concentration and secchi depth measurements. Phosphorus concentration is shown to be a good trophic state predictor variable and secchi depth a poor predictor variable.
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Habitat Selection and Movement of Pallid Sturgeon in Lake Sharpe, South Dakota
… 95.2 ± 5.3 NTU's where fish were located. Secchi disk measurements averaged 1.32 ± 0.13 mat these same locations. Small and large pallid sturgeon occupied different habitats. Small pallid sturgeon (< 5 kg) were located in areas of fast bottom water current velocities, mean 40.0 ± 2.1 cm/s, …
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Evaluation of Fish Stocking in Southeastern South Dakota Ponds
… Aᵼ estimates decreased. Estimated pond size and secchi disk visibility were positively correlated with a scale of balance. That is, as estimated pond size increased or the depth to which the secchi disk was visible increased balance improved.
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Spatial Distribution of Planktonic Copepoda and Cladocera in Red Rock Reservoir, Iowa, Summer, 1972
… summer, 1972, was undertaken. Water temperature, Secchi disk, and total water depth readings were also measured. Procedure. Volumetric samples of free-swimming zooplankton were collected at weekly intervals from June 6 to September 8, 1972. Collections were made at three stations on each of four …
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REMOTE SENSING OF WATER QUALITY IN LAKE ERIE USING MODIS IMAGERY DATA
… of the chlorophyll-a concentration and Secchi depth. These models included the general linear regression models, the Bayesian hierarchical regression model, and the nonlinear neural network model. The ground water quality measurements in Lake Erie used in this study included both …
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Population Dynamics of Largemouth Bass and Panfish in South Dakota Ponds
… vegetation coverage, specific conductance, Secchi disk transparency, surface area, maximum depth, total alkalinity, turbidity) were measured to determine the relationship between largemouth bass density and environmental variables in the ponds sampled in 1988 and 1989. Largemouth bass CPUE …
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Long-term spatiotemporal water quality and phytoplankton dynamics in Severn Sound, Ontario: a delisted great lakes area of concern
… such as total phosphorus, total nitrogen, Secchi disk visibility, and water temperature. Overall decreases in total phosphorus and chlorophyll a and increases in Secchi disk visibility illustrate the influences of nutrient reduction strategies, and potential influences from invasive …
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A limnological survey of Lake Laura, Virginia
… phosphorus surface water, chlorophyll g, and secchi disc levels measured. Due to atypical meteorological conditions experienced during the study, the Vollenwieder model was utilized to evaluate the impact of various nutrient sources on Lake Laura under more typical conditions. Nonpoint source …
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Exploring light transmission through ice-snow cover and water in lakes
… their use. A more affordable alternative is the Secchi disc, which has historically been used to measure Secchi depth and estimate water visibility. To effectively estimate water clarity, we developed a low-cost DIY (Do-It-Yourself) instrument using low-cost photoresistors. The instrument …
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Investigating the potential of remote sensing for long-term limnological analysis at pan-continental scales
… compiled covering temperature, chlorophyll a and Secchi disk depth in 23 European lakes spanning the last 30 years. The characteristics of these lake systems were explored and similarities in their ecological behavior identified, thus providing the basis for their grouping. Then the potential of …
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The effect of catchment land use on sediment input to Swartvlei
… were determined. Rainfall, water flow, Secchi disc and sediment load data are reviewed and the apparent relationship between them noted. Water samples were collected at 32 different sample sites to determine sediment loads. Samples were vacuum filtered through coarse and fine glass fibre …
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The Effect of Land Use on the Water Quality of Two Coves of Table Rock Reservoir
… were the chlorophyll a concentration and the Secchi disk transparency value as measured during the summer of 1985. These parameters were also transformed to a trophic scale in order to facilitate interpretation of the data collected. Several statistical tests were performed and it was …
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Factors Effecting Phytoplankton Assemblages in the Lafayette River Estuary
… of phytoplankton were salinity, temperature, Secchi depth, tidal phase, orthophosphate, combined nitrates and nitrites, ammonia, and reactive silicates.</p> <p>The River mouth had higher salinity and nutrient values, with lower temperatures than the other river sections. Diatoms were the …
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The Role of Photovoltaic Generation and Electric Mobility in Future Distribution Systems
In order to meet the worldwide limits on greenhouse gases emissions, a shift from a fossil fuels to a renewable energy-based electric system is required. As this process goes on, both the power generation and consumption profiles are changing in daily pattern and magnitude, so the power grid needs …
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L'esecuzione del giudicato amministrativo nell'esperienza italiana e tedesca: le soluzioni al problema dell'inottemperanza
La tesi si propone di analizzare il problema dell'esecuzione della sentenza amministrativa passata in cosa giudicata nell'esperienza italiana e tedesca, illustrando le soluzioni che i due ordinamenti hanno approntato per fronteggiare l'inottemperanza della p.a. agli obblighi da essa scaturenti. …
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Nanostructure formation on Germanium by ion irradiation
This thesis work is focused on the investigation of a peculiar phenomenon observed in germanium: the formation of a regular network of columnar nanovoids induced by heavy ion and high fluence irradiation at room temperature. This phenomenon can represent a possible way to produce wide …
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Knowledge Graphs and Large Language Models for Intelligent Applications in the Tourism Domain
In the current era of big data, the World Wide Web is transitioning from being merely a repository of content to a complex web of data. Two pivotal technologies underpinning this shift are Knowledge Graphs (KGs) and Data Lakes. Concurrently, Artificial Intelligence has emerged as a potent means to …
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The phytoplankton of a eutrophic lake : community dynamics and ultrastructural studies
… concentrations of chlorophyll a and with varying Secchi disc visibility . Scale-bearing planktonic organisms from Sawley Dene were studied as whole mounts in the electron microscope and 30 taxa are distinguished, including 17 species of flagellate Chrysophyceae (Mallomonas and related genera). …
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Impacts of Stocking Herbivorous Fishes for Aquatic Macophyte Removal Upon South Dakota Ponds
… Water transparency declines, as measured by secchi disc visibility and turbidity, were greatest in the monosex grass carp treatment. The evaluation of vegetation removal on largemouth bass-bluegill interactions was not possible because of the failure of bluegills to reproduce. Survival of …
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