San Francisco River Basin
Mostrando 1-12 de 12 artigos, teses e dissertações.
-
1. Gradientes edáficos e sua relação com as fitofisionomias do semi-árido meridional brasileiro / Edaphic gradients and their relationship with the vegetation types of semi-arid southern Brazil
The semi-arid region in Brazil represents a significant territorial extension, where the climate is markedly seasonal, with low rainfall, high evapotranspiration and higher temperatures. Its southern portion comprises the northern boundary between the states of Minas Gerais and Bahia. This region is dominated by dry forest vegetation type, however, different
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/02/2012
-
2. Diversidade cromossômica e molecular no gênero Astyanax (Characiformes: Characidae) / Chromosomal and molecular diversity in the genus Astyanax (Characiformes: Characidae)
The origin of the genus Astyanax, one of the most specious genera of the family Characidae is appointed as polyphyletic, with its current taxonomic status Incertae sedis.Morphologic, genetic and phylogeographic studies contribute to a better knowledge on the genus, which is considered a model. In this work, several species of different locations were studied
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/05/2011
-
3. Analysis of energy fluxes and vegetation-atmosphere parameters in irrigated and natural ecosystems of semi-arid Brazil.
Knowledge on evapotranspiration is essential in quantifying water use depletion and to allocate scarce water resources to competing uses. Despite that an extensive literature describes the theoretical mechanisms of turbulent water vapour transport above and within crop canopies fewer studies have examined land surface parameters within composite landscapes o
Journal of Hydrology. Publicado em: 2011
-
4. Estudo dos impactos econômicos da cobrança pelo uso da água na Bacia do Rio São Francisco: uma abordagem de insumo-produto.
This work aims to simulate the economic impact of the charge for the water use of the San Francisco River Basin (Brazil) through each economic sector. The Basin has been suffering problems with water availability, either in quantity or quality. In an attempt to manage this, it is used, among other instruments, the charge for water use. The purpose is to redu
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/12/2010
-
5. MAPPING AND CHARACTERIZATION OF THE FOREST FRAGMENTS DOWN RIVER BASIN IN SAN FRANCISCO AND SERGIPE IMPLICATIONS FOR CONSERVATION GUIGÓS (Callicebus SP.). / MAPEAMENTO E CARACTERIZAÇÃO DOS FRAGMENTOS FLORESTAIS DA BACIA DO BAIXO RIO SÃO FRANCISCO EM SERGIPE E SUAS IMPLICAÇÕES A PARA CONSERVAÇÃO DE GUIGÓS (CALLICEBUS SP.).
A distribuição geográfica dos organismos em paisagens fragmentadas é uma das principais abordagens da biologia da conservação devido ao quadro de perda do hábitat em quantidade e qualidade. Em Sergipe, os remanescentes florestais dos biomas da Mata Atlântica e da Caatinga ainda abrigam uma importante diversidade biológica. Este trabalho teve o objet
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/02/2010
-
6. Uso de imagens MODIS no mapeamento de bacias hidrogrÃficas
This research focuses on display applications of MODIS (Moderate Resolution Spectroradiometer) and the different types of its products. The MODIS was design for analysis of changes on a global scale, thus having different environmental applications. This sensor has 36 bands and 44 products for different types of searches. The spatial resolution of MODIS imag
Publicado em: 2009
-
7. Proposta conceitual para a regionalização de vazões / Conceptual proposal for the hydrologic regionalization
The knowledge water availability through hydrographic net is fundamental to management water resources concession use rights. Normally this knowledge is restrict to the places where exist fluviométrica measurement station. Hydrologic regionalization is a technical tool to supply lack of information where there are few or no data availability. From a socio-
Publicado em: 2008
-
8. Dinâmica do uso dos recursos hídricos nas bacias do ribeirão Entre Ribeiros e do rio Preto, afluentes do rio Paracatu / Water resources use dynamics in watersheds of Ribeirão Entre Ribeiros and Rio Preto, tributaries of the Paracatu River
From times past, humanity confronts problems of environmental degradation. The environment, which always performed efficiently its function of filtration, today finds itself excessively overburdened by human activities: it suffers the risk of its resources exhausting, not being able in certain situations to recuperate itself and needing the help of man. Howe
Publicado em: 2008
-
9. Abundancia y distribución de la fauna íctica en la cuenca del río Suquía (Córdoba, Argentina)
In this work a characterization of the Suquía river basin is presented. Fish were collected from sixteen selected sites from 1998 to 2002 in the main rivers of the basin: San Francisco brook, Cosquín river, Yuspe river, San Antonio river and Suquía river. Relative abundance, species richness, diversity and dominance were estimated. It was applied a Discri
Iheringia. Série Zoologia. Publicado em: 30/09/2007
-
10. COMPUTATIONAL MODEL FOR RESERVOIR OPERATION WITH MULTIPLE USES / Modelo computacional para operaÃÃo de reservatÃrios com mÃltiplos usos
Os desafios atuais para gerenciamento dos recursos hÃdricos decorrentes dos acrÃscimos no consumo de Ãgua, exigem o desenvolvimento e utilizaÃÃo de modelos e mÃtodos computacionais para otimizaÃÃo destes recursos e minimizaÃÃo dos conflitos. Para atender a estas necessidades, se apresenta, neste trabalho, o Modelo de SimulaÃÃo EnergÃtica do Nort
Publicado em: 2005
-
11. Analyze of the environmental impact study (EIS) and the water quality - the case in Brejo Santo borough,CearÃ,Brazil / AnÃlise do estudo de impacto ambiental e da qualidade da Ãgua - o caso AÃude Atalho - Brejo Santo,CearÃ
This work has as objective to analyze the Environmental Impact Study (EIS), carried through by SIRAC Consultant, and the water quality of Atalho reservoir situated in Brejo Santo borough, CearÃ, Brazil; to evaluate the EIS under the point of view of the released norms in Resolution 01/86 of CONAMA. The period of study was understood from January 2001 to Jan
Publicado em: 2002
-
12. New isotopic evidence for chronic lead contamination in the San Francisco Bay estuary system: Implications for the persistence of past industrial lead emissions in the biosphere
Measurements of lead isotope compositions in unfiltered San Francisco Bay waters from 1989 to 1998 have brought new insights into the cycling of anthropogenic lead in estuaries. Isotopic compositions of lead in the shallow (<2 m) southern reach were essentially invariant (∼90% derived from 1960s–1970s leaded gasoline) during the study period because
The National Academy of Sciences.