Association Between Particulate Phosphorus and Suspended Solids in an Everglades Trestment Wetland Dominated by Submersed Aquatic Vegetation PDF Download
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Author: Melina C. Farve
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Category :
Languages : en
Pages : 106
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Author: Melina C. Farve
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Category :
Languages : en
Pages : 106
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Author: Shannon C. Curtis
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Category :
Languages : en
Pages :
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Inorganic fractionation of soils indicated that surficial soils contained larger pools of inorganic P and a significant portion of the inorganic P exists in the Ca-bound pool. Although STA 1 West Cell 5b often reduces TP concentrations below 50 ug L−1, the DOP and PP concentrations must be reduced more efficiently to meet the new standard of 10 ug L−1.
Author: Hutcheon Engineers (West Palm Beach, Fla. : Firm)
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Category : Agricultural ecology
Languages : en
Pages : 44
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Author: DB Environmental Laboratories, Inc
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Category : Water
Languages : en
Pages :
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Author: James Donald Stuck
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Category : Agriculture
Languages : en
Pages : 808
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Author: Rupesh Kumar Bhomia
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Category :
Languages : en
Pages : 287
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Strong positive correlation between TP and calcium (Ca) in floc and RAS layers suggested Ca-P co-precipitation as the dominant mechanism of P removal in SAV cells. Among reactive P pools, the Pi pool was higher in SAV cells while Po pool was greater in EAV cells. Long-term effectiveness and sustainability of treatment wetlands is important to meet treatment targets and protect downstream targets. This dissertation research was designed to advance our understanding of the extent and quality of P pools in treatment wetlands to allow for better planning and management under conditions of environmental uncertainty.
Author: Marcelo Enrique Lago
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Languages : en
Pages :
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A numerical model has been developed to study the temporal and spatial variations of Phosphorus mass and fluxes around the tree islands of Shark River Slough in the Everglades. The developed model is based on a conceptualization of physical, chemical and biological processes that consider advective and diffusive transport of dissolved Phosphorus, adsorption on to soil, input from rainfall and external sources, and Phosphorus cycling in biomass. The biomass related processes are Phosphorus uptake, release as litter, transport as suspended litter and release from the decomposition of the deposited litter. The water flow and transport of dissolved Phosphorus in the numerical model are implemented originally in the simulator MODHMS. However, the transport equations for dissolved Phosphorus were also coded separately, as well as the balance equation for suspended litter particles and deposited litter. The parameterization of the model was conducted by using the data collected by Ross et al. [2004] in three tree islands of Shark River Slough, as well as other parameters reported among the literature. The model was calibrated in three phases. Initially, Manning coefficients were adjusted from surface water velocity data collected by Bazante et al. [2004]. Then the calibration of several groundwater flow parameters was performed from water table data collected at wells by Ross et al. [2004]. In the third phase, the Phosphorus input rate from external sources and the initial concentration of Phosphorus were calibrated by assuming that the average surveyed Phosphorus concentration in soil pore water remains approximately constant over a 10 year period. The quantitative assessment of the spatial distribution and temporal variations of Phosphorus mass and fluxes around tree islands obtained from the developed model corroborate the negative effect of the rainfall events on Phosphorus accumulation in the head of the tree island. However, the possible positive effect of the ET driven water flows on Phosphorous accumulation was found not as relevant as hypothesed by other authors in the literature. According to the model results, most of the Phosphorus transport in the tree islands occurs as suspended particles in surface water, even though the transport of dissolved Phosphorus in pore water cannot be neglected around the head of the island. The model results also suggest that an input of Phosphorus from external sources (e.g., animal activity such as bird guano and other sources) is needed to preserve the average Phosphorus levels in the head and in the whole tree island. Finally, Phosphorus accumulation and losses in certain areas of the tree island suggest changes in vegetation that need to be investigated in future work. The developed model can be used as a predicting tool to gain insight into the potential effects of restoration scenarios in tree islands environments. The model could be run for hypothetical future conditions and contribute to provide quantitative information for conservation and restoration efforts in the Everglades and similar wetlands.
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Category :
Languages : en
Pages :
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Successful control techniques and management practices for reduction of particulate phosphorus export must recognize the nature of the sources and their inherent characteristics. These characteristics are significantly different from those of upland systems, and require management practices that address the highly mobile, distributed nature of EAA particulate phosphorus. The subsequent documents in this series address transport characteristics of particulate phosphorus in the EAA and offer some options for control of sources and transport.
Author: William Wilmot Walker
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ISBN:
Category : Hydrologic models
Languages : en
Pages : 42
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Author: Duke Wetland Center
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Category : Ecology
Languages : en
Pages :
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