|
|
|
|
|
| Brinkmann,W.L.F.; Santos,A. dos. |
| Abstract The hypothesis was tested, whether hydrogen — ion concentration and electric conductivity in river water samples of the Tertiary region of central Amazonia were subject to changes in time and due to nature of storage. Over a period of about two months only changes in pH and conductivity of Rio Negro water samples were found to be significant. The total deviation of both parameters in rain forest stream samples was considered negligible for at least a period of 30 days, independant of the nature of storage (laboratory or icebox). The latter results may be generalized more or less unconditionally for the entire Tertiary formations of Amazonia. |
| Ano: 1971 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671971000200057 |
| |
|
|
| Brinkmann,W. L. F.; Santos,A. dos. |
| Abstract The principle sources of the calcium found in the water of the tertiary Amazonian region near Manaus, are the water running over the tree trunks and the total forest water. The soluble calcium content must come from the rain washing the tree crowns, stems, and leaves, and to a certain point from the dissolution of metabolic products of macro and micro-organisms. Generally, only traces of calcium are found in rain water, soil, and river water. Therefore, calcium can be considered as an element circulating in a closed system. Altogether the calcium content in the natural water of the tertiary Amazon region is extremely low. |
| Ano: 1973 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671973000200033 |
| |
|
|
| Reichardt,K.; Santos,A. dos; Nascimento F,V. F. do; Bacchi,O. O. S.. |
| Resumo Primeira tentativa para determinar a magnitude do fluxo de água subterrânea, a fim de estimar o potencial de elementos biologicamente importantes no ciclo de nutrientes no ecossistema Campina Amazônica. O fluxo saturado da água, dentro do lençol freático, foi estudado por 2 métodos, no período de dezembro de 1974 a janeiro de 1975: 1) aplicando-se a equação de Darcy; 2) usando-se um traçador 3h (100 mCi) na forma de 3H2O. As variações apresentadas pelos dois métodos foram provenientes da alta permeabilidade do solo arenoso, propiciando rápidas variações do lençol freático, totalmente influenciado pelas precipitações pluviométricas. Ambos os métodos apresentaram resultados da mesma ordem de grandeza, indicando a existência de um movimento horizontal... |
| Ano: 1975 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671975000300287 |
| |
|
|
| Brinkmann,W.L.F.; Santos,A. dos. |
| Abstract The hypothesis was tested, whether hydrogen — ion concentration and electric conductivity in river water samples of the Tertiary region of central Amazonia were subject to changes in time and due to nature of storag. Over a period of about two months only changes in pH and conductivity of Rio Negro water samples were found to be significant. The total deviation of both parameters in rain forest stream samples v/as considered negligible for at least a period of 30 days, independant of the nature of storage (laboratory or icebox). The latter results may be generalized more or less unconditionally for the entire Tertiary formations of Amazonia. |
| Ano: 1971 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671971000100077 |
| |
|
|
|
