Critical Hydraulic Conditions
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Analysis of mechanical behavior of an expansive soil from the oil province of Urucu-AM for paving / Análise do comportamento mecânico de um solo expansivo da província petrolífera de Urucu-AM para fins de pavimentação
The establishment of transportation infrastructure is critical to the development of the Urucu- AM region, a newly developed oil exploration area in the Amazonas state. The construction of such infrastructure is challenging due to the lack of suitable materials for the construction pavement base and subbase courses and adverse weather conditions, with altern
Publicado em: 2009
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2. Plant transpiration and soil hydraulic conditions / Transpiração de plantas e condições hidráulicas do solo
Taxas de transpiração inferiores às taxas potenciais limitam o crescimento e desenvolvimento vegetal e ocorrem em solos que apresentam condições hidráulicas inadequadas para a manutenção do fluxo de água requerido em direção às raízes de uma planta. A pesquisa que resultou nesta tese teve como objetivos: estimar em quais condições hidráulicas
Publicado em: 2008
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3. QUALIDADE FÍSICO-HÍDRICA DE UM ARGISSOLO SOB FLORESTA E PASTAGEM NO SUL DO BRASIL / PHYSICO-HYDRIC QUALITY OF A HAPLUDALF UNDER FOREST AND PASTURE IN SOUTH BRAZIL
Soil compaction is a problem in different production systems: agriculture, pasture and forest. In the agriculture soil compaction is well documented, while in the pasture and forest its study is scarce. The objective of this study was to evaluate the physical-hydric quality of an Alfisol under forest and pasture in South Brazil, and stabilish parameters and
Publicado em: 2008
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4. Tecnologia do irrigâmetro aplicada no manejo da irrigação do feijoeiro / Irrigâmetro of technology applied in the irrigation management of the bean
This work was performed at the Irrigation and Drainage Experimental Area of the Agricultural Engineering Department at the Universidade Federal de Viçosa (UFV), in Viçosa, located at 20 45` S and 42 45` W, in the state of Minas Gerais, Brazil, during the period of March to October of 2007. The objectives of this study were: a) determine the crop evapotrans
Publicado em: 2008
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5. Validação do modelo WEPP na predição de erosão hídrica para condição edafoclimática da região de Viçosa-MG / WEPP model validation in the prediction of water erosion for edaphic climatic conditions in the region of Viçosa-MG
The sensitivity analysis of the WEPP model demonstrated that for the Brazilian edaphic climatic conditions the most critical parameters from the soil are: the erodibility interril (Ki), the erodibility in rill (Kr), the critical shear strength (τc) and the effective hydraulic conductivity (Ke). Through is of fundamental importance the evaluation of the
Publicado em: 2007
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6. Estudo geolÃgico â geotÃcnico do processo erosivo em encostas no parque metropolitano armando de holanda cavalcanti - Cabo de Santo Agostinho/PE
Water erosion for if dealing with to a so vast and complex subject and as many implications need to be monitored, to be analyzed and to be understood in some scales. The inquiry campaigns must be based mainly on the involved mechanisms in the process. It is necessary to have relative information of the way, in what it says respect to the possibility of diffe
Publicado em: 2006
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7. Modelagem matemÃtica da hidrodinÃmica e qualidade da Ãgua no trecho a jusante da Barragem do Rio Pirapama-PE, Brasil
Seasonal drought periods, associated with highly impaired water quality levels, led the Pernambuco State Government to impose drastic reductions in Recife Metropolitan Area (RMR) water supply. Recently, construction of Pirapama River Dam is intended to solve part of the current lack of regular water supply to RMR. This study utilises a longitudinal, one-dime
Publicado em: 2002
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8. Water Relations of Leaf Epidermal Cells of Tradescantia virginiana12
Water-relation parameters (cell turgor pressure [P], volumetric elastic modulus [ε] and hydraulic conductivity [Lp]) of individual leaf epidermal cells of Tradescantia virginiana have been determined with the pressure-probe technique. Turgor was 4.5 ± 2.1 [41] bar (mean ± sd; in brackets the number of cells) and ranged from 0.9 to 9.6 bar. By vacuum infil