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- W2019643657 abstract "Sediment oxygen demand (SOD) is a significant part of the dissolved oxygen budgetin waterways, comprising up to 50% in some systems. It, therefore, has the potential of havinga significant impact on the environment. As such, an accurate and reliable determination ofSOD is needed when applying it to water quality studies. Current measurement techniques areoften difficult to implement and produce widely variable and inconsistent results betweendifferent methods. There is also currently no standardized approach. This study has aimed todevelop an alternative to current measurement techniques that places less reliance on SODchambers, allowing for easier multiplicity of measurements in order to more accurately quantifythe system, especially its variability over space and time. The objectives of this study are: 1)to develop a model for predicting SOD based on parameters developed for the system understudy; 2) to validate the model by comparing model results to SOD measurements made in the representative river system using benthic chambers. A finite difference model was developedbased on Ficks Law of Diffusion. Mass transfer principles are used to perform a mass balanceon the oxygen concentrations in the sediment in order to determine SOD. The developedmodel was used to predict SOD in the Arroyo Colorado River in South Texas. The modelgenerated results were compared against measurements obtained using benthic chambers inthe Arroyo Colorado at three sites. Results show good agreement between model predictedand measured SOD. Average SOD values at each site display percent differences from modelpredictions of 0.87%, 8.88% and 12.4%. This model shows potential for future sue in a varietyof water systems and even as a possible standard method. However, further study isnecessary to validate its usefulness in these applications. This model shows potential for futureuse in a variety of water systems and even as a possible standard method. However, furtherstudy is necessary to validate its usefulness in these applications." @default.
- W2019643657 created "2016-06-24" @default.
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- W2019643657 date "2003-01-01" @default.
- W2019643657 modified "2023-10-14" @default.
- W2019643657 title "Using a Spreadsheet-Based Model to Determine In-Stream Sediment Oxygen Demand from Simple Field and Lab Measurements" @default.
- W2019643657 doi "https://doi.org/10.13031/2013.14975" @default.
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