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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
41

Die Organisation des Gewässerschutzverbandes der Region Zugersee-Küssnachtersee-Aegerisee als Regionalverbandsmodell /

Granziol, Leo. January 1976 (has links)
Thesis (doctoral)--Universität Freiburg in der Schweiz.
42

A study of some of the bacteriological and chemical aspects of dead ends in Ann Arbor city water mains a disseration submitted in partial fulfillment ... Master of Science in Public Health ... /

Eveland, Warren C. January 1939 (has links)
Thesis (M.S.P.H.)--University of Michigan, 1939.
43

Hydrological impacts of land use changes on water resources management and socio-economic development of upper Ewaso Ng'iro River Basin in Kenya

Ngigi, Stephen. January 1900 (has links)
Thesis (doctoral)--Delft University and UNESCO-IHE Institute for Water Education, 2006. / Includes bibliographical references (p. 121-129).
44

What is water? The history and crisis of a modern abstraction /

Linton, James (Jamie), January 1900 (has links)
Thesis (Ph.D.) - Carleton University, 2007. / Includes bibliographical references (p. 425-456). Also available in electronic format on the Internet.
45

Compliance with environmental policies in China the role of state capacity /

Schwartz, Jonathan Aaron. January 2001 (has links)
Thesis (Ph. D.)--University of Toronto, 2001. / Includes bibliographical references (leaves 355-377).
46

Nutrient dynamics in and offshore of two permanently open South African estuaries with contrasting fresh water inflow /

Jennings, Michael Evan. January 2005 (has links)
Thesis (M. Sc. (Zoology and Entomology))--Rhodes University, 2006.
47

The development and application of ecological risk assessment in South African water resource management /

Claassen, Marius. January 2003 (has links)
Thesis (Ph. D. (Zoology and Entomology))--Rhodes University, 2006.
48

Report of an internship with the Ohio River Valley Water Sanitation Sommission (ORSANCO) in Cincinnati, Ohio

Sundar, Naveen. January 2004 (has links)
Thesis (M. En.)--Miami University, Institute of Environmental Sciences, 2004. / Title from first page of PDF document. Includes bibliographical references (p. 33).
49

A study to measure pollution effects on the antithermal maintenance and diversity index of stream periphyton of Little Cedar Creek and to illustrate the succession of the diatom fraction

Kareyva, Albert Joseph. January 1985 (has links)
Thesis (M.S.)--Kutztown University. / Source: Masters Abstracts International, Volume: 45-06, page: 3039. Typescript. Abstract precedes thesis as preliminary leaves [1-4]. Includes bibliographical references (leaves [51-52]).
50

Uniformidade de distribuição de água em irrigação localizada com sistema de aeração, decantação e filtragem

Silva, Elcides Rodrigues da [UNESP] 21 December 2009 (has links) (PDF)
Made available in DSpace on 2014-06-11T19:28:30Z (GMT). No. of bitstreams: 0 Previous issue date: 2009-12-21Bitstream added on 2014-06-13T19:58:01Z : No. of bitstreams: 1 silva_er_me_jabo.pdf: 2805002 bytes, checksum: 1edb5322d15c1af6d99d144fbc53004c (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / A pesquisa teve como objetivo avaliar o desempenho de um sistema de aeração, decantação e filtragem, quanto à prevenção de entupimento dos emissores e avaliar uniformidade de distribuição da água no sistema de irrigação por gotejamento na época de sua implantação e após um ano de utilização do sistema de prevenção. O trabalho foi realizado na Fazenda Estância Tropical, no município de Barretos – SP, no período de março de 2008 a fevereiro de 2009, realizando-se determinações físicas e químicas da água, ao longo do sistema de aeração, decantação e filtragem, que foi eficiente para a melhoria da qualidade de água, reduzindo os níveis de risco de entupimento de severo para médio e de médio para baixo. Todas as variáveis analisadas diferenciaram a qualidade da água entre os pontos de amostragem do sistema de tratamento, com exceção do Fe+2. Para sólidos em suspensão, turbidez, sólidos dissolvidos e ferro total, os valores reduziram-se pelo uso do sistema proposto, melhorando a qualidade da água. Após um ano de funcionamento do sistema de prevenção, os coeficientes utilizados para determinar a uniformidade de distribuição de água apresentaram valores acima de 80%, sendo classificados como excelente, bom e muito bom / The research aimed to evaluate the performance of aeration, sedimentation and filtration system for the prevention of emitters clogging and evaluate the water distribution uniformity of one drip irrigation system at the time of its implementation and after a year using the prevention system. The research was conducted in the Estancia Tropical farm, in the municipality of Barretos – SP, Brazil, from March 2008 to February 2009, carrying out physical and chemical determinations of water along the aeration, sedimentation and filtration system, which was efficient for improving water quality by reducing levels of risk of clogging of severe to medium and medium to low. All variables differed water quality between the collection points of the treatment system with the exception of Fe+2. For suspended solids, turbidity, dissolved solids and total iron values were reduced by the use of the proposed system, improving water quality. After a year of prevention, the coefficients used to determine the uniformity of water distribution had values above 80%, being classified as excellent, good and very good

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