Zobrazeno 1 - 10
of 14
pro vyhledávání: '"Jeffrey D. Cawlfield"'
Publikováno v:
Practice Periodical of Hazardous, Toxic, and Radioactive Waste Management. 14:170-177
The definition of contaminant source release is a necessary element of contaminant mass transport simulation in the saturated zone. At many sites the release history is unknown, and there has been a significant body of research to develop inverse mod
Autor:
Mohamed Sabry Ibrahim, Adly Abdel-Aziz Omer, Mohamed Ali, Jeffrey D. Cawlfield, Ahmed M. Youssef
Publikováno v:
Arabian Journal of Geosciences. 4:719-733
Land application is the only currently available technique for sewage wastewater disposal along the Nile Valley in Upper Egypt. Wastewater disposal projects have been established in the lowland desert zone extending between the cultivated floodplain
Autor:
Samuel Boateng, Jeffrey D. Cawlfield
Publikováno v:
Ground Water. 37:185-193
A two-dimensional probabilistic transport model is developed by coupling a reliability algorithm to a two-dimensional unsaturated flow and transport model. The goal is to determine the significance of the uncertainty of each variable to the probabili
Publikováno v:
Journal of Statistical Computation and Simulation. 57:353-364
First- and second-order reliability algorithms (FORM AND SORM) have been adapted for use in modeling uncertainty and sensitivity related to flow in porous media. They are called reliability algorithms because they were developed originally for analys
Autor:
John H. Piggott, Jeffrey D. Cawlfield
Publikováno v:
Journal of Contaminant Hydrology. 24:97-115
A reliability algorithm is coupled to a van Genuchten model-based unsaturated flow and transport numerical solution to develop a probabilistic model of one-dimensional non-reactive and reactive contaminant transport in the vadose zone. The reliabilit
Autor:
Jeffrey D. Cawlfield, Cecilia Elmore, John Patrick Conroy, Cristiane Q. Surbeck, A. Curt Elmore, Erica Collins
Publikováno v:
World Environmental and Water Resources Congress 2012.
Demographic data suggests that the number of students who will enroll in engineering programs at U.S. universities will decline in the near future. One way to offset the potential reduction in the number of future engineers in this country is to incr
Autor:
Jeffrey D. Cawlfield, Ming Chee Wu
Publikováno v:
Water Resources Research. 29:661-672
A reliability approach for probabilistic modeling of reactive transport in porous media provides two important quantitative results: (1) an estimate of the probability that dimensionless concentration equals or exceeds some specified level and (2) a
Autor:
Jeffrey D. Cawlfield, Ming Chee Wu
Publikováno v:
Stochastic Hydrology and Hydraulics. 6:103-121
A reliability approach is used to develop a probabilistic model of two-dimensional non-reactive and reactive contaminant transport in porous media. The reliability approach provides two important quantitative results: an estimate of the probability t
Publikováno v:
World Environmental and Water Resources Congress 2009.
Autor:
Jason Ovanic, Jeffrey D. Cawlfield
Publikováno v:
Environmental & Engineering Geoscience. :159-169
A geostatistical approach known as indicator kriging is used to analyze qualitative information about the areal distribution of abandoned coal workings beneath the city of Pittsburg, Kansas. Borehole information is transformed into binary indicator d