Search Results - "Gates, Timothy K"

Spatially refined salinity hazard analysis in gypsum‐affected irrigated soils by Brown, Ansley J., Andales, Allan A., Gates, Timothy K.

“…The global extent of salt‐affected agricultural land, 20% of which is deemed gypsiferous, results in billions of dollars of annual economic loss, a serious…”
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Assessing Selenium Contamination in the Irrigated Stream–Aquifer System of the Arkansas River, Colorado by Gates, Timothy K, Cody, Brent M, Donnelly, Joseph P, Herting, Alexander W, Bailey, Ryan T, Price, Jennifer Mueller

“…Prudent interventions for reducing selenium (Se) in groundwater and streams within an irrigated river valley must be guided by a sound understanding of current…”
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Uncertainty of canal seepage losses estimated using flowing water balance with acoustic Doppler devices by Martin, Chad A., Gates, Timothy K.

“…•Magnitude and uncertainty of canal seepage estimated for 60 water balance tests.•Steady and unsteady flow, lagged and simultaneous discharge measurements…”
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A Novel and Enhanced Calibration of the Tilting Weir as a Flow Measurement Structure by Pugh, Joseph E., Venayagamoorthy, S. Karan, Gates, Timothy K., Berni, Céline, Rastello, Marie

“…A large collection of laboratory measurements of piezometric head (h) and discharge (Q) were made over hydraulic models of a tilting weir at nine different…”
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Closure to “Some Insights on Flow over Sharp-Crested Weirs Using Computational Fluid Dynamics: Implications for Enhanced Flow Measurement” by Sinclair, Joseph M., Venayagamoorthy, S. Karan, Gates, Timothy K.

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Some Insights on Flow over Sharp-Crested Weirs Using Computational Fluid Dynamics: Implications for Enhanced Flow Measurement by Sinclair, Joseph M, Venayagamoorthy, S. Karan, Gates, Timothy K

“…AbstractThis study reexamines flow over a sharp-crested weir using computational fluid dynamics (CFD) to identify the optimal operating range under which the…”
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Simulating reactive transport of selenium coupled with nitrogen in a regional-scale irrigated groundwater system by Bailey, Ryan T., Gates, Timothy K., Ahmadi, Mehdi

“…•Selenium fate and transport is simulated in an agricultural groundwater system.•Fate and transport of nitrogen species also simulated.•Model is corroborated…”
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Characterization and control of irrigation canal seepage losses: A review and perspective focused on field data by Lund, A.A. Rehman, Gates, Timothy K., Scalia, Joseph

“…Canals compose the arterial structure of irrigated agriculture, transporting free-surface flows to the vast majority of the world’s most productive farmland…”
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Deep learning for compute-efficient modeling of BMP impacts on stream- aquifer exchange and water law compliance in an irrigated river basin by Rohmat, Faizal I.W., Labadie, John W., Gates, Timothy K.

“…Inefficient irrigation practices in the alluvial Lower Arkansas River Basin (LARB) of Colorado are contributing to salinization, waterlogging, reduced crop…”
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Relationships between riparian evapotranspiration and groundwater depth along a semiarid irrigated river valley by Lurtz, Matthew R., Morrison, Ryan R., Gates, Timothy K., Senay, Gabriel B., Bhaskar, Aditi S., Ketchum, David G.

“…Evapotranspiration (ET) from riparian vegetation can be difficult to estimate due to relatively abundant water supply, spatial vegetation heterogeneity, and…”
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Enabling improved water and environmental management in an irrigated river basin using multi-agent optimization of reservoir operations by Rohmat, Faizal I.W., Gates, Timothy K., Labadie, John W.

“…In Colorado's Lower Arkansas River Basin (LARB), inefficient irrigation and canal seepage contribute to salinization and waterlogging of irrigated lands and to…”
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Appraising options to reduce shallow groundwater tables and enhance flow conditions over regional scales in an irrigated alluvial aquifer system by Morway, Eric D., Gates, Timothy K., Niswonger, Richard G.

“…•Two regional-scale groundwater flow models are developed for an irrigated region.•Physically-based, distributed-parameter models include the unsaturated…”
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Stream-aquifer and in-stream processes affecting nitrogen along a major river and contributing tributary by Huizenga, Alexander, Bailey, Ryan T., Gates, Timothy K.

“…This study assesses the spatio-temporal patterns of water and nutrient mass exchange in a stream-riparian system of a major river and a contributing tributary…”
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Velocity measurements in developing narrow open-channel flows with high free-stream turbulence: Acoustic Doppler Velocimetry (ADV) vs Laser Doppler Anemometry (LDA) by Rastello, Marie, Klema, Matthew R., Carpenter, Alex B., Garanaik, Amrapalli, Venayagamoorthy, S. Karan, Gates, Timothy K., Marié, J.L.

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Assessing best management practices for remediation of selenium loading in groundwater to streams in an irrigated region by Bailey, Ryan T., Romero, Erica C., Gates, Timothy K.

“…•Selenium remediation strategies in a river valley aquifer system are explored.•Numerical model simulating Se and N fate and transport in groundwater is…”
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Modeling Variably Saturated Multispecies Reactive Groundwater Solute Transport with MODFLOW-UZF and RT3D by Bailey, Ryan T., Morway, Eric D., Niswonger, Richard G., Gates, Timothy K.

“…A numerical model was developed that is capable of simulating multispecies reactive solute transport in variably saturated porous media. This model consists of…”
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The Influence of Nitrate on Selenium in Irrigated Agricultural Groundwater Systems by Bailey, Ryan T., Hunter, William J., Gates, Timothy K.

“…Selenium (Se) contamination of groundwater is an environmental concern especially in areas where aquifer systems are underlain by Se‐bearing geologic…”
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Assessing the effectiveness of land and water management practices on nonpoint source nitrate levels in an alluvial stream–aquifer system by Bailey, Ryan T., Gates, Timothy K., Romero, Erica C.

“…The search for ways to allay subsurface nitrate pollution and loading to streams over broad regional landscapes is taken up using a calibrated groundwater…”
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Simulating variably-saturated reactive transport of selenium and nitrogen in agricultural groundwater systems by Bailey, Ryan T., Gates, Timothy K., Halvorson, Ardell D.

“…Selenium (Se) contamination in environmental systems has become a major issue in many regions world-wide during the previous decades, with both elevated and…”
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Regional Assessment of Soil Water Salinity across an Intensively Irrigated River Valley by Morway, Eric D, Gates, Timothy K

“…AbstractExtensive field investigations allowed depiction of soil water salinity within two large representative regions of a river valley that has been…”
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