Global ETD Search
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Showing 1 to 13 of 13 for “"Tile Drain"”.
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Modeling and measurement of tile drain controls in intensively managed landscapes
Tile drains are widely used in the Midwestern United States to improve the productivity of poorly drained agricultural fields. Since a tile drain reduces vadose zone soil moisture by lowering the water table, and its outlets feed directly into streams and ditches, tile flow can affect various …
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Comparison Of Denitrification Potential Around A Tile Drain And In Aquifer Sediments: Oakes, ND
… oxygen or NO<sub>3</sub>-.</p> <p>Artificial drainage within agricultural areas may allow contaminants to bypass, or increase conveyance through, reduced areas in which denitrification is likely to occur. This contributes to elevated NO<sub>3</sub>- yields as it is discharged directly into …
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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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Tile -Drained Watershed Scs-Curve Number Model
Tile flow can be quantified using the altered SCS-CN method. Through theory analogy, a procedure similar to the traditional SCS-CN method was developed to estimate tile flow from rainfall. However, the relationship between initial abstractions and potential maximum retention was redefined. Curve …
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Hydrologic Modeling of Irregular Tile Drainage Systems
… specifically address the influence of irregular tile networks on Midwestern watershed hydrology. Several issues were identified as pertinent to this specific task: solving the problem of flow to a single tile drain, addressing irregular tile networks at the watershed scale and integrating the …
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Geophysical characterization of onsite wastewater treatment system effects on groundwater quality, eastern North Carolina
… components, the exact locations of the OWS drainfield trenches are not always displayed relative to a benchmark, and modifications to the system (and location) are not always recorded. Ground penetrating radar (GPR) can be used to identify drainfield trenches in real time in the field. The …
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Developing groundwater and surface water interaction methods for complex hydrological systems
… situations that arise from use of artificial drains in agricultural catchments, and (ii) complex flow situations that sometimes arise as a result of a combination of near surface aquifers which are both perched and leaky. The specific objectives of this research project were (1) to improve …
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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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Predictability and trends of annual pollutant loads in Midwestern watersheds
… farmlands having a network of sub-surface tile drain systems. The science of pollutant export and various hydrological processes associated with it have been simulated using three major modeling approaches namely statistical and empirical modeling, physically-based modeling and data mining …
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A modeling framework for characterizing root exudation-driven geochemical dynamics in the Critical Zone
… of multi-phase gas diffusion through the soil, tile drain water fluxes and injection of gases in the soil through the tile line, exudation of organic acids, and expansion to a three-dimensional simulation framework. The work presented here lays the foundation to explore the role of vegetation in …
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Bioreactor-biochar (B2) treatment system: A novel design for efficient water pollution control from agri-drainage
… of modern agriculture, agricultural subsurface drainage plays a significant role in enhancing crop productivity, but there have been adverse environmental and health consequences associated with the use of the systems. Previous studies encourage adopting conservation practices or best management …
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Dynamics of inorganic soil-nitrogen age in intensively managed landscape
… applications and installation of subsurface tile drainage network, further complicate our ability to characterize the dynamics of nitrogen in the soil. Specific interpretation methods are thus required to gain a better understanding of the transformation and transport properties of soil …
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Evaluation and prediction of hydrology and nitrate-nitrogen transport in tile-drained watersheds
<p>Implementation of artificial subsurface drainage (tile drainage) for cultivation of row crops in poorly-drained areas of the Upper Midwest of the United States has enabled the region to be one of the most agriculturally productive areas of the world; but has also resulted in loss of wetland …