A5083788904- Urban Stormwater Management Solutions
- Groundwater flow and contamination studies
- Fecal contamination and water quality
- Hydrology and Watershed Management Studies
- Water resources management and optimization
- Sustainable Building Design and Assessment
- Water Quality Monitoring and Analysis
- Water Treatment and Disinfection
- Geophysical Methods and Applications
- Underground infrastructure and sustainability
- Water Quality and Pollution Assessment
- Water Systems and Optimization
- Wastewater Treatment and Reuse
- Flood Risk Assessment and Management
- Underwater Acoustics Research
- Hydrology and Sediment Transport Processes
- Sustainable Development and Environmental Policy
- Electrokinetic Soil Remediation Techniques
- Environmental Justice and Health Disparities
- Computational Physics and Python Applications
- Hydraulic Fracturing and Reservoir Analysis
- Water-Energy-Food Nexus Studies
- Engineering Education and Pedagogy
- Education and Critical Thinking Development
- Diverse Education and Engineering Focus
LEK Consulting (United States)
2024
University of Mississippi
2011-2021
ORCID
2017-2018
Carrier (United States)
2012-2017
Samueli Institute
2006-2009
University of California, Irvine
2005-2009
Southern California Coastal Water Research Project
2005
California Institute of Technology
2005
Jet Propulsion Laboratory
2005
Field studies were conducted to assess the coastal water quality impact of stormwater runoff from Santa Ana River, which drains a large urban watershed located in southern California. Stormwater river leads very poor surf zone quality, with fecal indicator bacteria concentrations exceeding California ocean bathing standards by up 500%. However, cross-shore currents (e.g., rip cells) dilute contaminated cleaner offshore, such that contamination is generally confined < 5 km around outlet....
Field studies were conducted to characterize the concentration vs streamflow relationships (or "flow fingerprints") of fecal pollution and suspended solids in stormwater runoff from Santa Ana River watershed, largest watershed southern California. The concentrations indicator bacteria F+ coliphages (viruses infecting E. coli) exhibit little-to-no dependence on rates, whereas total (TSS) a very strong (power-law) rates. different flow fingerprints observed for pollutants, one hand, TSS, other...
Fecal indicator bacteria (FIB) have long been used as a marker of fecal pollution in surface waters subject to point source and non-point discharges treated or untreated human waste. In this paper, we set out determine the source(s) elevated FIB concentrations Cucamonga Creek, concrete-lined urban stream southern California. Flow creek consists primarily disinfected wastewater effluent, mixed with relatively smaller but variable flow runoff from surrounding landscape. Dry wet weather...
Increasing variability in climate and environmental degradation call for an infrastructure design paradigm that considers both sustainability resilience using performance-based metrics. This paper discusses recent progress this direction, including emerging rating systems, technologies tools, examples of sustainable projects. Recommendations are made new research, development policy changes needed to further advance towards integrating approaches across the entire cycle. These include a...
Modeling is an important aspect of water quality management because it saves material and labor costs. The nonlinearity variables due to the complex chemical physical processes in a body makes modeling process difficult. This study used artificial neural network (ANN) approach, powerful computational tool for nonlinear relationships, develop model that estimates summer concentration total nitrogen (TN) phosphorus (TP) US lakes using interrelated easily measurable parameters. Two ANN models,...
Sustainability is commonly described as the intersection of environmental, economic, and social spheres, where represents that three spheres are in balance a project or activity. While environmental economic aspects projects addressed by engineers scientists when working on project, less quantifiable therefore somewhat neglected. The term "social sustainability" used to represent social, societal, human engagement, impact, vulnerablities project. This concept gaining attention being...
Environmental agencies are given the task of monitoring water quality in rivers, lakes, and other bodies water, for purpose comparing results with regulatory standards. Monitoring follows requirements set by regulations, data collected a systematic way intended purpose. enables to determine whether polluted. Much effort is spent per event, resulting hundreds points typically used solely comparison standards then stored little further use. This paper devises analysis methodology that can make...
Computer model simulations were conducted of an existing parking lot with pervious concrete low-impact development (LID) controls using the U.S. EPA Storm Water Management Model (SWMM). For three different types storms, performed a range pavement area coverages and infiltration rates to assess effects these variables on runoff volume. Field measurements in-place averaged 45 mm/h, suggesting that was not performing as effective LID control. The modeling results show increasing coverage by 30%...
Fecal indicator bacteria, such as total coliforms and E. coli, are a challenge to control in urban rural stormwater runoff. To assess the challenges of improving bacterial water quality standards surface waters, microcosm experiments were conducted how decay rates coli affected by sediments associated organic matter. Samples collected at lake embayment create laboratory microcosms consisting different combinations unsterilized sterilized sediment. Calculated first-order rate constants ranged...
Abstract In the United States, thousands of creeks, rivers, and coastal zones are listed as impaired in Clean Water Act's 303(d) list. The number one general cause impairments is denoted ‘pathogens’, which can include known pathogenic organisms or, more commonly, fecal indicator bacteria (FIB), such coliform bacteria, Escherichia coli , enterococci bacteria. Despite efforts by water quality managers to reduce FIB surface waters via treatment, successful significant reduction has been...
Service-learning courses at the university level provide a unique opportunity for students to learn about sustainability. The senior-level and graduate-level elective course Service-Learning Water Treatment University of Mississippi’s (UM) School Engineering combines educational service activities on drinking water–treatment infrastructure underprivileged communities. Students in person how build operate demonstration treatment systems then test new prototype configurations. This format...
Storms cause a substantial increase in the fecal indicator bacteria (FIB) concentrations stream water as result of FIB-laden runoff and release FIB from sediments. Previous work has emphasized association between bed sediments finer than sand. The objectives this were to elucidate effect various velocities on entrainment bed-dwelling coliforms sand-bed streams refine methodologies for quantifying sandy streambeds sources FIB. Pump-induced hydrographs created using stainless steel...
The replacement of natural pervious surfaces with impervious due to urbanization, construction, and development causes excess stormwater runoff results in cities experiencing localized flooding events. installation green infrastructure (GSI) is one way reducing events preventing downstream erosion damage. In this study, computer rainfall-runoff simulations were performed analyze GSI's effectiveness mitigating when applied sites different soil types for which design storms established by...
Abstract A common remedial technology for properties with subsurface soil and groundwater contamination is multiphase extraction (MPE). MPE involves the of contaminated groundwater, free‐floating product, vapor from subsurface. network recovery wells conveys fluids to a vacuum pump treatment system vapor. This article describes study operational data nine similar remediation projects determine most important design parameters. Design equations guidance manuals were used estimate expected...
Living Waters for the World (LWW) is a global mission resource of Synod Waters, governing body Presbyterian Church (USA). LWW trains, equips, supports and links teams to share clean water with needy communities over 320 systems in 24 countries around world. serves that have available but contaminated has developed modular (CWS) address needs each community. projects contribute UN Millennium Development Goal "Halve, by 2015, proportion population without sustainable access safe drinking...
Demographic data suggests that the number of students who will enroll in engineering programs at U.S. universities decline near future. One way to offset potential reduction future engineers this country is increase individuals from currently under-represented groups STEM majors. For example, women make up more than one-half all college but are less one-fourth student body. There initiatives levels studying engineering, and paper describes two grass-roots level Missouri University Science...