Petra A Plate - Academia.edu (original) (raw)

Papers by Petra A Plate

Hydrological Sciences Bulletin, 1973

Journal of Chromatography A, 1971

Cambridge University Press eBooks, Jul 13, 1995

Journal of Wind Engineering and Industrial Aerodynamics, Jul 1, 1991

... 4. Observed mean wind profiles and profiles corrected for the influence of internal boundary ... more ... 4. Observed mean wind profiles and profiles corrected for the influence of internal boundary layers by the method given by Perera [10]. ... The horizontal aerodynamic admittance function 182 x'~(f) = [8FF(/,z) /Suu(f,Z) ] [u2(z) /4F~(z) ] is calculated directly from force and turbulence ...

Ecological Modelling, Jun 1, 1978

Recently, efforts have increased in Germany to follow international developments in water quality... more Recently, efforts have increased in Germany to follow international developments in water quality and hydrology modelling. The authors were asked to analyze and report on existing models in order to summarize the "state of the art" of concepts and applications in this field. Some of the conclusions from their report are presented here. Information for the study was obtained from publications, project reports, personal interviews and discussions. Some of the models or model concepts were tested at the two institutes involved in this study. Of all the models investigated, 41 from 11 different countries were examined more closely, 20 of them emphasizing hydrological aspects, 18 focussing upon water quality and 3 incorporating both hydrology and quality. A large amount of material was accumulated during the study. Accordingly, some general principles of model analysis for comparison and presentation were established. So-called "macro-elements", comprising input, systems analysis formulation, algorithm and output, were identified. In addition, "micro-elements" were defined, denoting typical analytical units within the models, which helped to classify the models. In part A of the report, focussing upon hydrological models, three model classes were introduced according to the purpose, data requirements and model structures, viz. : computation of runoff data; optimal operation of regional water resources systems; and optimization of the design of hydraulic structures. Similarly, about 53 micro-elements were identified and subdivided into three groups: input information for hydrological models; formation of runoff processes; and system analysis formulation. Analysis of the hydrological models yielded some general observations including the following. The degree of mathematical sophistication is controlled by the available data; there is a limited number of recurring model elements; the interaction between surface and groundwater is poorly treated; and in most hydrological models environmental and economic aspects are neglected. Only a few models were equally devoted to water quality and quantity. Part B focussed upon water quality modelling, which has obtained significant impetus in the wake of increasing environmental concern. The more traditional approach of a descriptive analysis of the self-purification processes in rivers was explored in several

Applied Mathematics and Computation, Sep 1, 1985

A multicriterion decision-making (MCDM) technique with possibly nonnumerical criteria, called Mul... more A multicriterion decision-making (MCDM) technique with possibly nonnumerical criteria, called Multicriteria Q-Analysis I (MCQA-I), developed earlier on the basis of only a concordance analysis, is extended to include a measure of discordance. This new version, labeled MCQA-II, reduces an MCDM problem to the tradeoff between three conflicting indices calculated for each project or alternative. The indices are respectively a value or utility-type index PSI, and two outranking-type indices PCI and PDI. The example of selecting a project to alleviate pollution problems in the lower San Francisco Bay area illustrates the application of both versions of MCQA. A sensitivity analysis performed on the slicing-level set tends to show that MCQA-II leads to a more stable ranking than MCQA-I; in either case, application of the technique leads to selection of the project preferred in practice.

Abstract : A summary of accomplishments is given of both an experimental and analytical nature in... more Abstract : A summary of accomplishments is given of both an experimental and analytical nature in the following specific studies: (1) Airflow in simulated temperate and tropical forest canopy. (2) Methods of modeling diffusion tests ahead of time to design most efficient and economical field experiments. (3) Use of controlled models of field tests to extend empirical data on CB transport and diffusion. (4) Extend wind tunnel investigation to thermally stratified boundary layers and broader ranges of surface roughness. (5) Investigation of longitudinal dispersion through both shear flow and turbulence. (6) Extend the Lagrangian similarity hypothesis considering a more realistic probability function. (7) Model Dugway Proving Ground and study mean wind patterns near the ground when flow aloft is oriented SW-SE. (Author)

Hydrology Research, Aug 1, 1989

The case of a dam for an irrigation reservoir is used as an example to illustrate the different m... more The case of a dam for an irrigation reservoir is used as an example to illustrate the different modes of failure of a water resources system. The types of failure to which a dam can be subjected are described in the first section of the paper, in terms of a framework of general reliability analysis. Two applications are considered: the case of operational failure, illustrated by means of an irrigation reservoir for arid countries, and the case of dam failure due to overtopping. Conceptual models are given which permit the inclusion of reliability and other figures of merit into both operation and safety analysis.

CER63EJP-JEC28.Includes bibliographical references

CER63EJP-JEC39.September 1963.Prepared for National Bureau of Standards.Under contract no. CST-7450

Bauen ist Lebensgrundlage - Der Wegfall der Investitionen ist der falsche Weg. Vorträge, gehalten am 18. Februar 2005 in Stuttgart. Hrsg.: V. Hahn, 2005

Available from TIB Hannover: RO 1728(97) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Techn... more Available from TIB Hannover: RO 1728(97) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman

Water International, 2000

Differing objectives for water use of the river Rhine cause major conflicts among stake-holders. ... more Differing objectives for water use of the river Rhine cause major conflicts among stake-holders. With changes in the value systems of the decision makers, the concepts for river development have also changed over the last two hundred years, and what had once been considered a major advance in development was, at a later date, decried as a major insult to nature. The conflict of development for human uses on the one hand and environmental concepts of nature preservation on the other is particularly evident in the Upper Rhine Vallley, In that stretch of the Rhine, the river has been converted from a naturally braided or meandering stream into a channel for navigation and hydropower production serving three nations: France, Switzerland, and Germany. Recently, a plan has evolved for meeting demands for flood protection in combination with renaturalization of the river. This is the Integrated Rhine Program developed by the State of Baden Wurttemberg and France. The program is briefly exp...