<p> Daily discharge data from five Southern Ontario river systems were statistically analysed to seek relationships between streamflow characteristics and basin size. From each river system, at least two stations were used to detennine such relationships. The physiographic characteristics of each river system were also examined and qualitatively related to the streamflow statistics. Comparisons between physiographic regions were expected to support the general nature of the results obtained for each river system.</p> <p> In Southern Ontario, drainage area is correlated with mean annual peak flows. When the flows were transformed into discharge per unit area no consistent effects of basin area on the streamflow characteristics were found. However, differences in streamflow per unit area between various sub-basins can be qualitatively explained by several physical characteristics of the drainage basins.</p> / Thesis / Bachelor of Science (BSc)

Summary The agrarian loads in basin of river Apaščia Karst Region area of North Lithuania is described in this article. Meth-ods and results of research were disputed shortly. The research was done 2003-2005. It is searching, what kind of farming land forms dominate in basin of river Apaščia and farming land forms influence to quality of river‘s water.

In master thesis researches to appreciate the agrarian strain to basin of river Tatula in the North karst region area of Lithuania. Object of the work: The basin of river Tatula, which is in the North karst region area of Lithuania. Aim of work: 1. gather up the water samples of river Tatula in autumn and spring; 2. to do ourselves the water quality researches of river Tatula; 3. to collect farmers in basin of river Tatula by questionnaires method; 4. to sum up the results and to dimension pollution’s sizes and sources; Methods of the work: The river samples were taken in 2003, 2004 autumn and 2004, 2005 spring. Water samples were taken up to the river, middle of the river and down to the river. Then water samples were transported to a laboratory, where would be setted: pH of the water, permanganate oxidation, BDS, ammonium azote concentration, phosphate phosphorus. Also were collected farmers who were farming in basin of Tatula by questionnaires method. Work out results of the waters quality shows that agrarian work effect partially influence pollution basin of river Tatula. When were done water‘s researches of river Tatula were setted ammonium azote concentration exceeded DLK and river water's quality was bad, compare with the other assay parameters water‘s quality is unbroken DLK. Keywords: The North karst region area of Lithuania, the basin of river, the agrarian strain, BDS7, pH, ammonium azote.

Thesis (Ph. D.)--Stanford University, 1998. / Includes bibliographical references (leaves 349-357).

Submitted by Edileide Reis (leyde-landy@hotmail.com) on 2013-04-09T19:17:23Z No. of bitstreams: 1 Milai.pdf: 9537585 bytes, checksum: ae908f3b047560efb0b0cf4466295e8c (MD5) / Approved for entry into archive by Rodrigo Meirelles(rodrigomei@ufba.br) on 2013-05-09T18:16:03Z (GMT) No. of bitstreams: 1 Milai.pdf: 9537585 bytes, checksum: ae908f3b047560efb0b0cf4466295e8c (MD5) / Made available in DSpace on 2013-05-09T18:16:03Z (GMT). No. of bitstreams: 1 Milai.pdf: 9537585 bytes, checksum: ae908f3b047560efb0b0cf4466295e8c (MD5) Previous issue date: 2009 / Esta dissertação enfoca a influência do processo de urbanização em bacia urbana. O estudo abrange a Bacia do Rio do Cobre, situada no Subúrbio Ferroviário da Cidade do Salvador, Estado da Bahia. Foram definidos dois objetivos: estudar a influência do processo de urbanização na geração de fatores que impactam a qualidade hídrica da Bacia do Rio do Cobre; e, identificar diretrizes de preservação e conservação direcionadas para recursos hídricos nos Planos Diretores de Desenvolvimento Urbano de Salvador. A metodologia aplicada foi fundamentada na abordagem qualitativa; os dados da pesquisa foram obtidos por pesquisas bibliográfica, documental e pesquisa de campo. Por meio da investigação o estudo culminou com os seguintes resultados: o processo de urbanização na área da Bacia do Rio do Cobre influenciou na geração de fatores que impactam negativamente a sua qualidade hídrica em virtude das características da urbanização que se desenvolveu: espontânea, aleatória, irregular, com densidade incompatível com a capacidade de suporte do meio hídrico, próxima às áreas de cachoeiras e nascentes, com retirada da cobertura vegetal, sem infraestrutura de saneamento básico. O processo de urbanização com as características referidas influenciou na geração de fatores que impactam a qualidade hídrica da Bacia, tais como: assentamento humano, criação de animais, área agrícola, lavagem de roupa, bairros do entorno e complexo industrial, entre outros. As principais consequências negativas para o ecossistema aquático, identificadas no estudo, foram: assoreamento; destruição dos ecossistemas do leito da Bacia e das margens; escoamento direto de resíduos sólidos e lançamento de óleos, esgoto doméstico, embalagens de produtos químicos agrícolas; alteração da qualidade da água; desaparecimento da fauna aquática; desequilíbrio das relações ecológicas do meio; diminuição da biodiversidade e contaminação do lençol freático. O comprometimento da qualidade da água, consequentemente, comprometeu a qualidade de vida da comunidade da bacia em estudo. O estudo ainda concluiu que os Planos Diretores de Desenvolvimento Urbano de Salvador apresentam diretrizes que visam a conservação e preservação dos recursos hídricos. Recomenda-se a reversão do quadro de degradação hídrica da Bacia do Rio do Cobre, por meio da determinação popular e governamental, em virtude do valor ecológico, cultural e religioso da área para a cidade de Salvador. / Salvador

Murray cod Maccullochella peelii peelii is an iconic freshwater angling species that has suffered declines in abundance and is now listed as a nationally vulnerable species. Despite recognition of the need for biological knowledge to provide future management directions, little is known of its ecology. This thesis examines that ecology to provide new knowledge and recommendations for improved conservation management. (For complete abstract open document)