Drawdown
Mostrando 1-12 de 16 artigos, teses e dissertações.
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1. Influence of water level in mine sequencing applied to strategic mining planning
Abstract Developing mine sequencing involves a number of factors and a large amount of information, and consequently the profitability of the project will strongly depend on the production schedule. A mining project may be conditioned to non-optimal sequencing, which may affect the economic results of the project and also lead to an inadequate utilization of
REM, Int. Eng. J.. Publicado em: 2020-06
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2. Induced reproduction in a migratory teleost species by water level drawdown
Reprodução em cativeiro é um dos problemas enfrentados na aquicultura exigindo a manipulação de fatores ambientais e/ou tratamento hormonal. Assim, verificou-se experimentalmente as alterações gonadais presentes em indivíduos adultos de Astyanax altiparanae decorrentes da diminuição do nível da água. As coletas foram realizadas a cada quatro hora
Neotrop. ichthyol.. Publicado em: 31/03/2015
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3. Sensibilidade da Brachiaria brizantha cv. Marandu ao excesso de água no solo / Sensitivity of Brachiaria brizantha cv. Marandu to excess soil water
The expansion of agriculture will promote the incorporation of new areas to the productive process and in this process, areas with drainage problems will have the possibility to be used. For the proper utilization of these areas, the correct sizing of drainage systems is important. For the rational sizing in a nonpermanent scheme, it is necessary to determin
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/07/2012
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4. Avaliação de métodos de campo para a determinação de condutividade hidráulica em meios saturados e não saturados
The determination of the hydraulic conductivity of saturated insaturated media for hydrogeologic research is a frequent activity, to academic studies and for practical works. This hydrodynamic parameter is determined by in situ measures, for the insaturated zone the concentric rings and open end hole methodologies are applied and for the saturated zone the s
Publicado em: 2010
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5. Análises tridimensionais de barragens de enrocamento com face de concreto com objetivo de otimizar os critérios de projeto
Concrete Face Rockfill Dams (CFRD) have been constructed with increasing frequency all around the world. However, design criteria still are mostly empirical and based on practical experience obtained during the construction of this type of dam. The use of numerical analyses is not yet a usual tool in the development and design of CFRD. Aiming to reduce the d
Publicado em: 2007
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6. MODELAGEM NUMÉRICA DE FLUXO 3D EM MEIOS POROSOS / NUMERICAL MODELING OF 3D FLOW IN POROUS MEDIA
Numerical simulations tend to simplify the behavior of real problems, mainly through the choice of 2D models to describe the hydromechanical responses of earth dams, excavations, foundations, etc., partly because it is easier to construct geometrical meshes, it is simpler to impose the required boundary conditions, the computer calculations are done more rap
Publicado em: 2006
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7. Estimating the drainable porosity using different methodologies / Estimativa da porosidade drenável por diferentes metodologias
This study had as its objective to estimate the drainable porosity through different methodologies. Four methods were utilized: the first one was based upon the water table drawdown in a soil filled tank; the second one based upon the Van Beers empirical equation, the third one through the ABNT recomendation, and the last one based upon the water release cur
Publicado em: 2006
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8. Effects of water table management and nitrogen supplies in crops under hypoxia conditions in soil / Influência do manejo do nível freático e doses de nitrogênio em culturas sob hipoxia no solo
In many countries, extensive agricultural areas are affected by short-term waterlogging that cause significant damages to the crop yields. The objectives of this work were: a) to evaluate the stress effect of the soil water excess on lentil plants (Lens culinaris Medik) related to water table management; b) to evaluate the behavior of soybean cultivars (Glyc
Publicado em: 2006
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9. Appled numericl modeling to the analysis of sea intrusion in the south of Recife Coastal Plain (PE) / Modelagem numÃrica aplicada à anÃlise da intrusÃo marinha na regiÃo sul da PlanÃcie do Recife (PE)
Groundwater is considered a safe and well protected source of water supply, and in some places it should be used as a strategic reserve. However, lack of adequate management in coastal aquifers has led to several problems, including seawater intrusion. Recife metropolitan region encompasses 14 towns and 14 mÂ/s of water supply demand, facing problems with d
Publicado em: 2005
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10. Potato (Solanum tuberosum L.) and lettuce (Lactuca sativa L.) sensibility to water excess in soil. / Sensibilidade das culturas da batata (Solanum tuberosum L.) e da alface (Lactuca sativa L.) ao excesso de água no solo.
This work had as objectivies determinating the effects of root system flooding in three stages of growing of potato and lettuce crops, identifying the minimum water-table drawdown velocity necessary to avoid yield reductions and obtaining relations between relative yield and stress day index caused by excess of water in the soil. For these purposes two exper
Publicado em: 2004
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11. ESTUDOS PIEZOMÉTRICOS E ANÁLISE DE ESTABILIDADE DE TALUDES DA BARRAGEM BICO DA PEDRA
In this work, an attempt was made to establish a simple field procedure to be used on the Bico de Pedra dam stability and safe operation. This dam is located at Janaúba city, state of Minas Gerais, Brazil. This procedure was called Risk Table. For the Risk Table elaboration a sequence of studies and numerical simulations were developed, based on laboratory
Publicado em: 2004
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12. AvaliaÃÃo do potencial da recarga artificial como alternativa para recuperaÃÃo da potenciometria de aquÃfero: estudo de caso na planÃcie do Recife-PE
Artificial recharge in aquifers may be employed to increase groundwater storage and availability, salinization control in coastal aquifers and land subsidence. Recife coastal Plain (PE) multiaquifer system consists of two deep confined aquifers, Cabo and Beberibe, with half- confined characteristics, covered by a phreatic aquifer, Boa Viagem. The excessive d
Publicado em: 2004