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Showing 1 to 14 of 14 for “"Tile flow"”.
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Modification of the Field Moisture Balance Water Quality model (FMBWQ) to simulate subsurface drainage and preferential flow
… simulating subsurface drainage and preferential flow to FMBWQ. The modified FMBWQ was calibrated and validated for an agricultural plot in the Iowa State University North East Research Center near Nashua, Iowa (hereafter referred to as the Nashua site). The study has been undertaken as part of …
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A Vadose Zone Field Study: Subsurface Tile Drainage, Hydrology, and Variablity
… during energy limiting periods. A winter flow 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. …
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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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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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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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Experimental and Numerical Investigations of the Thermal Environment in Air-cooled Data Centers
… and heavily instrumented to measure power, flow rates, velocities, turbulent intensity, and temperature distribution around three simulated computer racks in the controlled RL environment. CFD models were developed and the results were validated against the experimental data measured in the …
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Analysis of best management practices implementation on water quality using the Soil and Water Assessment Tool (SWAT)
… Vermillion County) is a mainly agricultural tile-drained watershed, where the dominant soil series are Drummer silty clay loam and Flanagan silt loam. Using previously collected data from the watershed outlet (1998-2000) and land management scheduling, a Soil and Water Assessment Tool (SWAT) …
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Fate of water and nitrate using drainage water management on tile systems in East-Central Illinois
Nitrate from agricultural fields in the tile-drained upper Midwest is one of the primary causes of the hypoxic zone that forms each summer in the Gulf of Mexico. Drainage water management (DWM) is a potential edge-of-field technique that is being studied as a method to improve soil water management …
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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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Exploring saturated drainageways for nitrate reduction in tile-drained agricultural lands
… Black Hawk County, Iowa, the research monitored flow and NO₃⁻N 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 …
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Hydrologic Modeling of Irregular Tile Drainage Systems
A physically-based flow model has been developed to 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 …
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Water Flow and Chemical Transport in a Subsurface Drained Watershed
Tile-drainage in the Corn Belt has a great impact on surface water quality, at all scales (field, watershed and drainage basin) especially by increasing nitrate loads in the Mississippi River. An improved understanding of flow and transport is essential to better manage these ecosystems. However, …
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Simulation of conservation practice effects on water quality under current and future climate scenarios
… produced satisfactory predictions of streamflow, nitrogen and phosphorus losses. Between the baseline period (1961-90) and the end of this century (2099), average annual precipitation for the watershed is expected to increase by approximately 8.5%, average daily solar radiation will increase …
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Evaluation and prediction of hydrology and nitrate-nitrogen transport in tile-drained watersheds
… 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 …