Article
Geosciences, Multidisciplinary
Thomas Grangeon, Valeria Ceriani, Olivier Evrard, Aurelie Grison, Rosalie Vandromme, Arthur Gaillot, Olivier Cerdan, Sebastien Salvador-Blanes
Summary: This study quantified water and sediment transfers in a tile drained catchment of central France and found high seasonal variability and two transfer pathways in the soil column during 36 recorded flood events.
Article
Soil Science
Vinicius F. Boico, Rene Therrien, Jan H. Fleckenstein, Guilherme Nogueira, Bo V. Iversen, Rasmus J. Petersen
Summary: In this study, a three-dimensional coupled surface-subsurface model was used to simulate a tracer test in a densely tile-drained field, aiming to improve the representation of tracer concentration at the drainage discharge. The model accurately simulated drainage discharge and tracer transport to tile drains, but underestimated the tracer peaks and the late-time tracer mass at the drain outlet. Improvements to the model include the implementation of heterogeneous soil layers and the inclusion of more measured data to reduce uncertainty during calibration.
SOIL SCIENCE SOCIETY OF AMERICA JOURNAL
(2023)
Article
Engineering, Civil
Mark R. Williams, Scott J. McAfee
Summary: This research focused on quantifying hydrological processes in a drained landscape in Indiana, USA, using hydrometric data and stable isotope signatures. The study found that near-surface soil water reflected seasonal precipitation variations, while groundwater was recharged during winter. Groundwater was identified as the primary source of water to the tile drain, with hydrograph response controlled by antecedent wetness. Comparing tile drain celerities across environmental conditions revealed varying mechanisms controlling hydrograph response.
JOURNAL OF HYDROLOGY
(2021)
Article
Engineering, Civil
Vinicius F. Boico, Rene Therrien, Anker L. Hojberg, Bo V. Iversen, Triven Koganti, Ioannis Varvaris
Summary: Tile drains in agricultural fields can potentially facilitate the migration of solutes in groundwater and surface water bodies. This study demonstrates the use of depth specific electrical conductivity estimates to improve hydrological simulations in a tile drained field.
JOURNAL OF HYDROLOGY
(2022)
Article
Agronomy
Ryan Ruggiero, Donald Ross, Joshua W. Faulkner
Summary: Tile drainage (TD) has been identified as a potential non-point source of phosphorus (P) pollution that can lead to water quality issues. In this study, TD flow and P export in three fields in Vermont, USA were monitored, and the results showed that TD was the dominant pathway for P export due to higher total discharge. The study also highlighted the impacts of current manure management and the potential for climate change to increase P transport to TD.
Article
Soil Science
Maria Isabel S. Senal, Bo V. Iversen, Soren O. Petersen, Lars Elsgaard
Summary: Detailed knowledge of the nitrate attenuation capacity is essential for the regulation of fertilizer nitrogen. This study analyzed the spatial heterogeneity of nitrate, ammonium, and total nitrogen concentrations in an artificially drained sub-catchment. The results showed that the electrical conductivity and slope of the soil profile influenced the nitrate attenuation capacity. Higher electrical conductivity corresponded to lower nitrate concentrations. The study suggests that electrical conductivity can be used as a tool to map nitrate reduction patterns in the unsaturated zone.
Article
Water Resources
Genevieve Grenon, Abderrachid Hamrani, Chandra A. Madramootoo, Bhesram Singh, Christian von Sperber
Summary: This study investigates the application of neural network models for deriving phosphorus (P) management strategies in the organic soils of Holland Marsh. The results show that the feed-forward model using randomization and the long-short-term memory model using time-series perform better than other models. Two P management strategies were evaluated: a direct approach predicting P loads through fertilizer rates or controlled drainage discharge rates, and a particle swarm optimization (PSO) method predicting optimal water table management strategy based on percent reduction of actual P loads. The direct approach suggests that maintaining a water table level of 30 cm in spring and 80 cm in summer can effectively reduce P loads. The PSO analysis indicates that reducing P loads by 20% in spring and up to 40% in summer through water table control will not compromise crop production.
HYDROLOGY RESEARCH
(2022)
Article
Environmental Sciences
Tina B. Bech, Nora Badawi, Annette E. Rosenbom
Summary: Despite the presence of the intI1 gene casting doubt on the barrier effect of the soil, it was found to be an effective barrier against the spread of fecal ARGs during the monitoring year.
JOURNAL OF ENVIRONMENTAL QUALITY
(2022)
Article
Environmental Sciences
Saeid Nazari, William Ford, Kevin W. King
Summary: This study developed a framework that combines hydrograph recession and specific conductance end-member mixing analysis to quantify flow pathway dynamics and source connectivity of drainage water more accurately. Results showed significant impact of pathway connectivity dynamics on dissolved reactive P concentrations and highlighted differences between new and old water flow contributions, as well as variations in pathway contributions to tile discharge.
VADOSE ZONE JOURNAL
(2021)
Article
Environmental Sciences
William Osterholz, Vinayak Shedekar, Zachary Simpson, Kevin King
Summary: This study demonstrates that using water quality data and management records can help identify the contributions of new and old phosphorus sources to dissolved reactive phosphorus losses in subsurface tile drainage. The results show that new phosphorus sources contribute less to overall losses, while old soil phosphorus sources have a larger impact.
JOURNAL OF ENVIRONMENTAL QUALITY
(2023)
Article
Environmental Sciences
Simin Xie, Guizhang Zhao
Summary: This paper studies the law of soil water transport in the vadose zone under heterogeneous media conditions, especially the three-dimensional transport mechanism. By constructing a three-dimensional model of water transport and analyzing the vertical distribution and variability of soil water content, it is found that the heterogeneity of layered soils has a significant impact on water transport. The research results can provide scientific reference for the rational planning of water resources in the Yinchuan Plain.
Article
Agronomy
Amir Sadeghpour, Oladapo Adeyemi, Bryan Reed, Jim Fry, Reza Keshavarz Afshar
Summary: Harvesting winter cereal rye as emergency forage can help offset costs and promote adoption, but delayed harvesting may result in decreased forage quality.
Article
Engineering, Civil
Mengqi Jia, David R. Lapen, Danyang Su, K. Ulrich Mayer
Summary: This study uses sensitivity analysis to evaluate the suitability of non-equilibrium gas diffusion and gas exchange processes in accounting for the development of anaerobic hotspots and N2O production and emissions. The research findings suggest that the development of anaerobic hotspots is controlled by both physical and geochemical parameters. Additionally, the simulation model successfully reproduces spatiotemporal variations in greenhouse gas concentrations and fluxes in an agricultural soil in Canada.
JOURNAL OF HYDROLOGY
(2023)
Article
Engineering, Chemical
Satyendra Singh Chauhan, Pallav Dhanendrakumar Shah, Ashish Tiwari
Summary: The proposed study aims to theoretically investigate the heat transfer phenomenon in the flow of temperature-dependent viscous blood through microvessels surrounded by a thin layer of endothelial glycocalyx. The study concludes that the temperature parameters influence all the physical quantities and the temperature-dependent viscosity plays a significant role in medical treatments involving temperature variation.
TRANSPORT IN POROUS MEDIA
(2022)
Article
Environmental Sciences
Jiangnan Li, Qianhang Sun, Kun Lei, Liang Cui, Xubo Lv
Summary: The study aimed to identify the potential sources of nitrate (NO3 (-)) pollution in Cao-E River basin, Eastern China, and analyze their respective contribution rates to improve water quality. The results showed that manure and sewage, soil nitrogen, and nitrogen fertilizer were the major contributors to NO3 (-). In addition, atmospheric deposition, nitrogen fertilizer, manure and sewage, and soil nitrogen accounted for varying proportions of NO3 (-) during the dry and wet seasons. This study provided valuable evidence for understanding the sources, transport, and transformation of nitrogen in the Cao-E River basin, deepening the understanding of N contaminant management.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2023)