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Civil and Environmental Engineering Commons™

Open Access. Powered by Scholars. Published by Universities.®

University of Mississippi

2022

Articles 1 - 5 of 5

Full-Text Articles in Civil and Environmental Engineering

Effects Of Feeding Mode On The Performance, Life Span And Greenhouse Gas Emissions Of A Vertical Flow Macrophyte Assisted Vermifilter, Rajneesh Singh, Chittaranjan Ray, Daniel N. Miller, Lisa M. Durso, Yulie Meneses, Shannon Bartelt-Hunt, Matteo D’Alessio Dec 2022

Effects Of Feeding Mode On The Performance, Life Span And Greenhouse Gas Emissions Of A Vertical Flow Macrophyte Assisted Vermifilter, Rajneesh Singh, Chittaranjan Ray, Daniel N. Miller, Lisa M. Durso, Yulie Meneses, Shannon Bartelt-Hunt, Matteo D’Alessio

Faculty and Student Publications

This study was conducted to investigate the impact of intermittent feeding on performance, clogging, and gaseous emission on macrophyte assisted vermifiltration (MAVF) based treatment system. Synthetic slaughterhouse wastewater was applied to two different integrated vertical flow based MAVFs. Triplicates were used throughout the study. Eisenia fetida earthworms were added to MAVFs, and Carex muskingmenis plants were planted. Wastewater was applied to the reactors on 1) intermittent (8 h/day) (IMAVF) and 2) continuous (24 h/day) (CMAVF) basis. The average chemical oxygen demand, total nitrogen, and total phosphorous removals achieved by the IMAVF were 80.2 ± 1.6%, 53.9 ± 1.3% and 66.5 …

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Evaluating Pedestrian Service Of The New Super Diverging Diamond Interchange On Three Case Study Sites In Denver, Colorado, Muhammad Tahmidul Haq, Amirarsalan Mehrara Molan, Khaled Ksaibati Dec 2022

Evaluating Pedestrian Service Of The New Super Diverging Diamond Interchange On Three Case Study Sites In Denver, Colorado, Muhammad Tahmidul Haq, Amirarsalan Mehrara Molan, Khaled Ksaibati

Faculty and Student Publications

Ensuring safe and comfortable conditions for pedestrians necessitates specific strategies at intersections and service interchanges where traffic and pedestrians interact in complex ways with other modes of transportation. This study aims to investigate pedestrian performance at the new Super Diverging Diamond Interchange (Super DDI) using real-world locations (i.e., I-225 and Mississippi Ave, I-25 and 120th Ave, and I-25 and Hampden Ave in Denver, Colorado). Three alternative designs, typical DDI, and two versions of Super DDI were considered to make a reasonable comparison with the existing Conventional Diamond Interchange (CDI). A comprehensive series of simulation models (192 scenarios with 960 runs) …

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Evaluating Groundwater Storage Change And Recharge Using Grace Data: A Case Study Of Aquifers In Niger, West Africa, Sergio A. Barbosa, Sarva T. Pulla, Gustavious P. Williams, Norman L. Jones, Bako Mamane, Jorge L. Sanchez Apr 2022

Evaluating Groundwater Storage Change And Recharge Using Grace Data: A Case Study Of Aquifers In Niger, West Africa, Sergio A. Barbosa, Sarva T. Pulla, Gustavious P. Williams, Norman L. Jones, Bako Mamane, Jorge L. Sanchez

Faculty and Student Publications

Accurately assessing groundwater storage changes in Niger is critical for long-term water resource management but is difficult due to sparse field data. We present a study of groundwater storage changes and recharge in Southern Niger, computed using data from NASA Gravity Recovery and Climate Experiment (GRACE) mission. We compute a groundwater storage anomaly estimate by subtracting the surface water anomaly provided by the Global Land Data Assimilation System (GLDAS) model from the GRACE total water storage anomaly. We use a statistical model to fill gaps in the GRACE data. We analyze the time period from 2002 to 2021, which corresponds …

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A Framework For Estimating Future Traffic Operation And Safety Performance Of Restricted Crossing U-Turn (Rcut) Intersections, Amirarsalan M. Molan, Jonathan Howard, Mouyid Islam, Anurag Pande Jan 2022

A Framework For Estimating Future Traffic Operation And Safety Performance Of Restricted Crossing U-Turn (Rcut) Intersections, Amirarsalan M. Molan, Jonathan Howard, Mouyid Islam, Anurag Pande

Faculty and Student Publications

Background: Despite numerous studies demonstrating the effectiveness of Restricted Crossing U-Turn (RCUT) intersection design, its implementation remains uneven and close to zero in some large states, including California. This paper provides a comprehensive framework to estimate the operational and safety performance of future RCUT designs. The framework is demonstrated for a geometrically constrained intersection located on a highspeed rural expressway. The operational evaluation relies on microscopic simulation models of existing TWSC and alternate RCUT designs used to estimate network-wide performance measures. Methods: Two approaches are demonstrated for future safety estimation; first, an HSM-prescribed Empirical Bayes (EB) approach that uses Safety …

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Application Of Artificial Neural Network To Predict The Properties Of Permeable Concrete, Hatem H. Almasaeid, Donia G. Salman Jan 2022

Application Of Artificial Neural Network To Predict The Properties Of Permeable Concrete, Hatem H. Almasaeid, Donia G. Salman

Faculty and Student Publications

The structure of permeable concrete has been the primary reason for its use in construction. Permeable concrete is composed of water, cement, aggregate, and little-to no-fines resulting in the presence of a significant number of voids. This makes permeable concrete an ideal solution to water accumulation issues as it acts as a drainage system. This study employs a feedforward backpropagation artificial neural network model that combines experimental laboratory data from previous studies with appropriate network architectures and training techniques. The purpose of the analysis is to develop a reliable functional relationship, based on water-cement ratio, aggregate-cement ratio, and density parameters, …

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