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RISNitrate Dynamics under Cyclic Irrigation Pumpage
Publisher: American Society of Civil Engineers
Abstract: Large-scale nitrate contamination of ground water is often observed in irrigated areas where the soils are generally permeable, and nitrate plumes have been reported to occur at shallow depths in unconfined aquifers. It ...
Neural Networks for Agrichemical Vulnerability Assessment of Rural Private Wells
Publisher: American Society of Civil Engineers
Abstract: Assessment of pesticide and nitrate contamination of rural private wells was conducted using artificial neural networks. Data from 192 drilled and driven wells and 115 large-diameter dug and bored wells, available from two ...
Postaudit Study of DBCP and EDB Contamination in the Pearl Harbor Aquifer
Publisher: American Society of Civil Engineers
Abstract: A simulation of the transport of dibromochloropropane (DBCP) and ethylene dibromide (EDB) in the vadose zone and ground water was conducted in the Mililani area of central Oahu, Hawaii to revisit the ground water contamination ...
Use of Qualitative and Quantitative Information in Neural Networks for Assessing Agricultural Chemical Contamination of Domestic Wells
Publisher: American Society of Civil Engineers
Abstract: A neural network analysis of agrichemical occurrence in groundwater was conducted using data from a pilot study of 192 small-diameter drilled and driven wells and 115 dug and bored wells in Illinois, a regional reconnaissance ...
Grid-Based Model for Estimating Evapotranspiration Rates of Heterogeneous Land Surface
Publisher: ASCE
Abstract: The complementary relationship areal evapotranspiration (CRAE) model estimates actual evapotranspiration (ET) based on potential and wet environment evapotranspiration rates. The existing CRAE-based models that calculate ...
Distribution of Discharge Intensity along Small-Diameter Collector Well Laterals in a Model Riverbed Filtration
Publisher: American Society of Civil Engineers
Abstract: Experiments were performed to evaluate flow and head variations along perforated screens (
Applied Injected Air into Subsurface Drip Irrigation: Plant Uptake of Pharmaceuticals and Soil Microbial Communities
Publisher: ASCE
Abstract: The growing global food security crisis is complicated by the need for increased crop production with less arable land and limited water resources. Reuse of treated wastewater for agricultural irrigation is becoming more ...
Growing Corn and Sugar Beets with Feedlot Effluent, Air Injection, and Subsurface Drip Irrigation System in Western Nebraska
Publisher: American Society of Civil Engineers
Abstract: As a state with the most irrigated agricultural land in the United States, Nebraska relies on freshwater resources for its irrigation. In addition to these conventional water sources, using nonconventional alternatives for ...
Comparing Transport of <i>Cryptosporidium</i>-Sized Carboxylated Microspheres in Two Undisturbed Soil Cores under Unsaturated Conditions
Publisher: American Society of Civil Engineers
Abstract: Cryptosporidia are opportunistic pathogens, some of which infect humans when ingested in water or food. Filtration through granular media is the primary mechanism to remove them from water. Natural soils’ ability to filter ...
Decay Kinetics of Chlorite under Simulated Distribution System Conditions
Publisher: American Society of Civil Engineers
Abstract: Nitrification of chloraminated water in distribution systems, particularly in summer time, is a serious problem for some utilities because nitrifying bacteria deplete residual chloramine, allowing the growth of other ...