Engineering Commons^™

Comparison Of One-Dimensional And Two-Dimensional Hydrodynamic Modeling Approaches For Red River Basin, Sajjad Ahmad, Slobodan P. Simonovic

Civil and Environmental Engineering and Construction Faculty Research

EXECUTIVE SUMMARY

A devastating flood in Red River valley in 1997 emphasized the need to study the flood control measures in the Red River basin using state of the art modeling tools. The Red River and its floodplains can be modeled using one-dimensional, quasi two-dimensional or fully two-dimensional hydrodynamic models. Each modeling approach has its own advantages and limitations. The main purpose of this report is a comparison between one-dimensional (or quasi two dimensional) and fully two-dimensional hydrodynamic modeling approaches for modeling floods in the Red River basin.

A two-dimensional hydrodynamic model, MIKE 21, coupled with Geographic Information System (GIS) …

Runoff From Fescue Plots Treated With Trimec, Cristopher G. Moss, Dwayne R. Edwards, Stephen R. Workman, R. Michael Williams

Biosystems and Agricultural Engineering Faculty Publications

Runoff of herbicides can promote adverse impacts in receiving waters. The objective of this study was to assess the effects of rainfall delay, herbicide application rate, rainfall intensity, and pre-application rainfall on runoff of TRIMEC (a combination of 2,4-D, dicamba, and mecoprop), a herbicide that is commonly used in central Kentucky. The levels of rainfall delay were 0, 2, and 4 d following application; and the levels of herbicide application rate were 0, 0.5, 1 and 2 times the recommended rate. Simulated rainfall was applied at intensities of 64, 102, and 140 mm h^-1; and the depths of …

Metadata In A Digital Special Library: The Energy And Environmental Information Resources Center In Lafayette, Louisiana, Dan Foley

E-JASL 1999-2009 (Volumes 1-10)

This paper discusses three kinds of metadata and how they are used in the Energy & Environmental Information Resources Center (EE-IR Center), a digital special library of text, numeric, and geospatial data, located in Lafayette, Louisiana. These metadata are Dublin Core (DC), MARC21 (formerly USMARC), and Federal Geographic Data Committee (FGDC) metadata.

The EE-IR Center was formed as a partnership between the National Wetlands Research Center (NWRC) of the U.S. Geological Survey and the Center for Advanced Computer Studies of the University of Southwestern Louisiana (CACS/USL). Both partners are located in Lafayette, Louisiana. The EE-IR Center is funded by a …

Pirolityczne Metody Utylizacji Odpadów Niebezpiecznych - Przykładowe Rozwiązania I Emisja Zanieczyszczeń, Robert Oleniacz

Robert Oleniacz

The paper presents the pyrolysis and gasification processes of organic matter and the main directions of their use for the thermal disposal of hazardous waste. Used for this purpose the basic technical solutions are discussed with regard to existing and new technologies. Given the fact that the pyrolytic methods in Poland were primarily used for the incineration of medical waste, most attention was paid to a facility designated for such waste disposal. The problem of air pollutant emissions from this type of installation and some operating guidelines was also presented on the basis of the literature analyses and own research. …

Zastosowanie Procesów Pirolizy I Zgazowania Do Termicznej Utylizacji Odpadów, Robert Oleniacz

Robert Oleniacz

The paper presents characteristic of pyrolysis and gasification processes and main trends to their application for the waste thermal treatment. Selected examples of the applications and course of these processes as well as sorts of their final products is here also discussed.

English title: The use of pyrolysis and gasification processes to waste thermal utilization.

Media Coverage Of Epa's Draft Dioxin Reassessment Report, Sharon M. Friedman, Megan A. Fitzpatrick, Brenda P. Egolf

RISK: Health, Safety & Environment (1990-2002)

Using content analysis, the authors examine the utility of news media in democratic decision making.

Emisja Związków Fluoru Z Hutnictwa Żelaza, Marian Mazur, Marek Bogacki, Robert Oleniacz

Robert Oleniacz

The article presents the results of the last few years of comprehensive researches related to the emission of fluorine compounds from iron metallurgy in Poland. Determined of the levels of flue-gas concentrations and air emissions for fluorine in the form of gaseous and solid compounds, including water-soluble compounds (considered to be toxic). The study also made it possible to analyze of raw materials used in these processes taking into account fluorine content and its impact on the amount of fluorine compounds emitted to the air.

English title: Emissions of fluorine compounds with iron metallurgy.

Modelowanie Stężenia Ozonu W Niskiej Troposferze Na Przykładzie Nowego Sącza, Marek Bogacki, Marek Mazur, Robert Oleniacz

Robert Oleniacz

The paper presents the results of research related to the modeling of physicochemical phenomena occurring in the ground layer of the atmosphere in terms of ozone formation. For this purpose, the box model was used, in which the computational area is defined as a space designated by a steady surface and a variable height. Conducted in Nowy Sącz (Poland) experiment confirmed the possibility of using this type of model to diagnose and possibly forecasting ozone concentrations in any area of ​​calculation. The study also showed that the quality of the results depends mainly on accuracy in preparing of input data, …

Novel Carbon-Carbon Bond Oxidative Cleavage Of Hexabenzyl-Hexaazaisowurtzitane By N-Buono And (Nh4)2ce(No3)6, Xiao-Pei Guan, Hong Yan, Jian-Guang Sun, Yong-Zhong Yu

Publications and Research

Treatment of 2,4,6,8,10,12-hexabenzyl-2,4,6,8,10,12-hexaazatetracyclo-[5.5.0.05,9.03,11]dodecane with n-butyl nitrite or ammonium cerium nitrate results in novel C(1)-C(7) oxidative cleavage to give 1,3,4,5,7,8-hexabenzyl-cis-cisoid-cis-hexahydro-1H,5H-diimidazolinium[4,5-b:4′,5′-e]pyrazine dinitrate.

A Model For Stripping Multicomponent Vapor From Unsaturated Soil With Free And Trapped Residual Nonaqueous Phase Liquid, David Ostendorf, Chiu-On Ng, Chiang C. Mei

David Ostendorf

We present a model for the multicomponent vapor transport due to air venting in an unsaturated zone in the presence of free and trapped phases of residual nonaqueous phase liquid (NAPL). On the microscale the soil particles are assumed to form spherical aggregates with micropores filled with immobile water, trapped phases of NAPL and air. The interaggregate space is occupied with mobile air, and a thin film of free NAPL adheres on the aggregate surface. While the free NAPL can readily be in equilibrium with macropore vapor, the mass transfer from immobile phases in aggregates is rate-limited by aqueous diffusion. …

A Two-Component Aggregation Model, Thomas A. Chisholm Jr

Dissertations, Theses, and Masters Projects

An aggregation model which allows specification of primary particle size, density, and fractal dimension for two different particle types was written. Three stickiness values are used, the stickiness of each particle type to itself and the stickiness between particle types. Aggregation mechanisms considered include differential settling and turbulent shear. The model is used in three forms. In its simplest form, it operates on a closed system with aggregates breaking up when their size approaches the Kolmogorov scale. If the system begins with two types of primary particles, larger aggregates have uniform composition. A second version of the model includes removal …