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Showing 1 to 20 of 28 for “"Agricultural drainage"”.
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Microbial community dynamics in denitrifying biofilters receiving agricultural drainage
Subsurface drains (tile drains) used to augment drainage in agricultural fields serve as a major pathway for agricultural nitrate pollution to enter surface waters. Used primarily in the Midwestern United States, nitrates from tile drainage systems contribute to eutrophication within the Gulf of …
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Filamentous algae as a nutrient scrubber for agricultural drainage treatment
… to remove and recover diffuse nutrients from agricultural drainage water. FANS use attached filamentous algae that grow and assimilate nutrients from the water which are removed when algal biomass is harvested for beneficial use (e.g. biofertilizer, animal feed supplement). This thesis …
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Morphological Analysis and Hydrologic Response of Small Agricultural Drainage Basins
Made available in DSpace on 2014-12-09T20:03:08Z (GMT). No. of bitstreams: 1 6910826.pdf: 6215252 bytes, checksum: 275b3b3f7c7426a178ce1956ac65b607 (MD5) Previous issue date: 1968
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Carbon dosing of denitrifying bioreactors to remove nitrate from agricultural drainage
… of a pilot-scale (58 m³) bioreactor treating drainage waters from a 0.65 ha paddock on a dairy farm. The effects of carbon dosing on the bioreactor's nitrate removal rates were assessed following a constant dosage of 8% (v/v) methanol solution at 10 mL min⁻¹ to the bioreactor's inlet …
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Using temperature profiles to investigate the hyporheic zone in an agricultural drainage ditch
… water system to include the man-made drainage ditch environment. The goal of this research is to use vertical temperature profiles as a means to identify locations along the drainage ditch where surface water/ground water exchange takes place within the hyporheic zone. To achieve this, …
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Passive detection of phosphorus in agricultural drainage waters using reactive hybrid anion exchange resins
Phosphorus (P) loss from agricultural fields has long been an environmental issue due to its negative impact on aquatic ecosystems such as eutrophication and hypoxia. To reduce agricultural P loss, large-scale P monitoring activities are needed to identify specific fields and or watersheds that are …
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Impact of Biochar Amendment, Hydraulic Retention Time, and Influent Concentration on N and P Removal in Horizontal Flow-Through Bioreactors
… practice (BMP) that intercepts and treats agricultural drainage by supporting nitrate-attenuating denitrification with a saturated, carbon-filled substrate, were developed. Since then, their utility has expanded, and recent studies have unearthed biochar's capability to stimulate …
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Maximization of the Electrochemical Detection of Orthophosphate in Organic-Aqueous Solutions.
… discharge of phosphorus-containing wastewater, agricultural drainage, and industrial wastes into bodies of water can result in the long-term destruction of the existing ecosystems. Monitoring of phosphorus concentrations in effluents and natural waters has, therefore, become a necessary regimen …
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Origin and Transport of Nutrients in the Upper Big Sioux River, South Dakota
… River and Willow Creek Basins, were primarily agricultural drainage areas, and one segment was the city of Watertown. Sampling stations were selected to facilitate the determination of nutrient inputs to the river from each of these segments and to determine the nutrient load in the river …
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Measuring Bioavailable Copper in Estuarine Waters using an Ion Exchange Resin
… strongly bound copper in estuarine waters and agricultural drainage. Copper bound to an ion exchange resin has been operationally defined as bioavailable copper, or copper that is available for uptake by aquatic organisms. Initial laboratory testing indicated that the percent of copper bound to …
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Fully-coupled physically-based approach for modeling conventional and managed subsurface drainage
"Subsurface drainage is an essential water management practice that is partly responsible for the legendary agricultural productivity of the ""corn-belt"" region in the United States. Recent researches indicate that the conventional drainage practice has contributed a large percentage of the …
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Conceptualizing Anthropogenic Change in Fluvial Systems: Drainage Development on the Upper Embarras River, Illinois
… been shown to be catastrophically affected by agricultural drainage in the area over the past century and a half."
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Biogeochemistry of denitrifying bioreactors to enhance phosphorus removal from agricultural subsurface drainage
… a global environmental concern. In Aotearoa, agricultural pollution of freshwaters by nutrients is increasing. Therefore, strategies need to be implemented to minimize nutrient pollution in surface waters. Denitrifying bioreactors (DBRs) are a prominent edge-of-field treatment technology to …
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DEVELOPMENT OF NOVEL SENSORS FOR ANIONS OF ENVIRONMENTAL INTEREST
… field evaluation by continuous immersion in both agricultural drainage weirs and a river were undertaken. The nitrate results obtained with the ISEs compared very favourably (R^=0.99) with those obtained with a segmented-flow instmment in a concentration range 0.47-16 ppm nitrate-N. The electrodes …
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Fate and transport of antibiotic resistant bacteria and resistance genes in artificially drained agricultural fields receiving swine manure application
… their excrement. Application of swine manure to agricultural fields as fertilizer creates a pathway for antibiotic resistant bacteria and their associated resistance genes to enter the environment. This study monitored enterococci, tylosin resistant enterococci and four genes known to confer …
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Dissolved phosphorus removal in denitrifying bioreactors: field and laboratory studies
… designed to remove nitrate (N) from subsurface agricultural drainage water. However, phosphorus (P) removal has been observed in bioreactors across Illinois. Both N and P play an important role in eutrophication and hypoxia in the Gulf of Mexico. Therefore, it is important to evaluate P dynamics …
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Improved Environmental Characterization to Support Natural Resource Decision Making: (1) Distributed Soil Characterization, and (2) Treatment of Legacy Nutrients
… pair carbon heavy subterranean receptacles to agricultural drainage. This provides a location for nitrogen fixing bacteria to consume nitrate/nitrite, turning these into inert nitrogen gas. A spring fed bioreactor is studied for 10 months, and bioreactor conditions including influent and …
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Ecotoxicology of Natural and Anthropogenic Extreme Environments
… fishery species and are frequently found in agricultural drainage ditches, an example of an anthropogenic extreme environment. </p> <p>Total glutathione, catalase, superoxide dismutase, and lipid peroxidation levels were of the same respective order of magnitude in the two vent gastropods, …
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The Varying Effects of Climate And Landscape Changes on Increased River Flows In Minnesota Watersheds
… flows, particularly in its southern, heavily agricultural region, since 1940. However, these areas have also experienced significant increases in the extent of corn/soybean cropping and artificial drainage. Currently, the relative contributions of these factors to increased flows are not well …
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