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Showing 1 to 20 of 48 for “"Tile drainage"”.
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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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Compost Bioreactors for Removing Agricultural Chemicals From Tile Drainage Water
The 6-month-old compost was also examined for its capacity to promote denitrification in column studies. The extent of nitrate removal depended on the solid retention time, but could also have been influenced by the amount of compost in the column that could be utilized as an energy source by …
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Factors influencing phosphorus losses in agroecosystems dominated by tile drainage
… subsurface (perforated plastic pipes called tiles) drainage affecting the quality of receiving aquatic ecosystems. However, controls of phosphorus losses at the sub-field and watershed scales are not fully understood. The overall goal of this study is to determine the effect on phosphorus …
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A Vadose Zone Field Study: Subsurface Tile Drainage, Hydrology, and Variablity
… period was marked with a large loss of water to tile flow possibly the result of off site regional groundwater contributions. The piezometer analysis showed the difference in water table behavior between undrained and drained conditions. Cluster analysis showed more variability for the drained …
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Numerical modeling of agricultural tile drainage water quality with health considerations
… by the time concentration profiles reached the tile and sampling point, most loading information had been obscured. TOUGHREACT proved to be a valid and useful tool to simulate many of the factors affecting fate and transport, but additional calibration with real world data is needed. …
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Comparison of Heterotrophic Activity in Forested Streams Originating from Wetland and Agricultural Tile Drainage Sources
… headwater streams being sourced by agricultural tile drains instead of wetlands. Tile drainage inputs can influence stream conditions (i.e., temperature, hydrology, and water chemistry) that are important drivers of ecological function. To assess the influence of agricultural tile drainage inputs …
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Evaluation of agricultural beneficial management practices: Cattle access restriction to surface waters subsurface tile drainage management
… between managed and conventional subsurface tile drainage. Over two years, nitrogen loads in groundwater, in tile flow, in plants, in soil and denitrification were compared between treatments. Nitrogen was mostly removed from managed tile drainage fields through plant uptake. Compared to …
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Nutrient removal and greenhouse gas emissions from 20 year old constructed wetlands receiving tile drainage water: a biogeochemical analysis
Restriction data tranferred 2014-07-01T11:39:44-05:00 Original Data Group with Access Administrator Release Date: 2016-05-30 12:21:23 UTC Reason: Author requested closed access (OA after 2yrs) in Vireo ETD system
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Transient flow of water in saturated-unsaturated soil profiles
In this thesis tile transient flow of water, during tile drainage process in saturated-unsaturated soil profiles, was studied. Drainage experiments were performed on two different soil profiles. The first experiment undertaken was tile drainage of a vertical column of sand. This experiment was …
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Effect of bioenergy crops and fast growing trees on hydrology and water quality in the Little Vermilion River Watershed
… widely planted in the Midwestern U.S. Subsurface tile drainage systems enable the Midwest area to become highly productive agricultural lands, but also create environmental problems like nitrate-N contamination of the water it drains. The Soil and Water Assessment Tool (SWAT) has been used to …
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Modification and Evaluation of a Water Balance Model to Simulate Corn Yields in Drained Waterways
… modified to determine yield response to tile drainage in waterways based on climate data. Modifications to the model were completed based on field measurements. Infiltration and tile drainage routines in the model were modified to improve the model simulation of the water table. …
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A Field-Scale Study of Controlled Tile Drainage and a Pond-Wetland to Attenuate Nutrients from Agricultural Overland Runoff and Subsurface Drainage on a Farmer-Operated Seed Farm in Saint-Isidore, ON
Agricultural runoff and drainage are significant contributors to the deterioration of water quality in receiving water bodies. Ponds and constructed wetlands are proven treatment systems that can remove nutrients and reduce peak flow. A combined controlled drainage structure (CDS), free drainage …
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A study of the groundwater travel time distribution at a rural watershed in Iowa: A systems theory approach to groundwater flow analysis
… travel time distribution framework applied to a tile-drained, agricultural landscape at the watershed scale. Specifically, we examined the two dimensional, steady state groundwater flow characterizing a shallow, unconfined aquifer at a representative watershed. A groundwater flow model of the …
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Improving performance and expanding application of denitrifying bioreactors for nutrient management in agricultural landscapes
Subsurface tile drainage is widely implemented across agricultural landscapes in the U.S. Midwest, creating direct hydrologic pathways that transport excess nutrients from fields to surface waters. As a result, nitrate (NO₃) can bypass natural soil filtration and attenuation processes, contributing …
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Exploring saturated drainageways for nitrate reduction in tile-drained agricultural lands
… concentration to quantify mass loss within the drainageway. The study site featured a grassed waterway established in the 1970s, which was modified to function as a saturated buffer by diverting tile drainage into a perforated distribution line. From January to May 2024 16% of the total tile …
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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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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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A spatial analysis of phosphorus in the Mississippi River Basin
… rivers and streams are through surface runoff or tile drainage from agricultural fields and from point sources, primarily sewage effluent. The objective of this study was to analyze the spatial pattern of P inputs and outputs in the MRB as they relate to riverine P yields to the Gulf of Mexico and …
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Predicting Field Water Balance, Crop Yield, and the Economics of Drainage Under Various Cropping Systems Using Drainmod
<p>Subsurface drainage received considerable attention during the recent few years in South Dakota. While subsurface drainage is a widely accepted water management practice for increasing crop yield, research implicated tile drainage in surface and groundwater quality problems. Conservation …
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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 …
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