Soil Moisture Sensors
Mostrando 13-22 de 22 artigos, teses e dissertações.
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13. Avaliação do sensor de umidade TOPDEA no manejo da irrigação. / Evoluation of the moisture sensor topdea for irrigation scheduling.
The scientific community, in recent years, has intensified studies to measure the impacts to the environment caused by pollution, mainly the adverse effects to air and water. The fact that less than 1% of the global water resources is comprised of drinking water and available at the surface of the earth makes it a commodity of conflict. According to the FAO
Publicado em: 2008
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14. Estudo das propriedades geotécnicas de solos residuais não saturados de Ubatuba (SP). / Study of the geotechnical properties of unsaturated residual soils of Ubatuba (SP).
This doctoral thesis focusing on the study of the geotechnical properties of unsaturated residual soils occurring in the municipal district of Ubatuba, north coast of the State of Sao Paulo. The study of geotechnical properties was conducted from a macro and micromorfology approach, seeking to establish the relationship between the water present in the resid
Publicado em: 2008
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15. EMISSÃO DE GASES DE EFEITO ESTUFA EM SISTEMAS DE MANEJO EM SOLO DO PLANALTO MÉDIO DO RIO GRANDE DO SUL / SHORT-TERM GREENHOUSE GASES EMISSIONS IN SOIL MANAGEMENT SYSTEMS IN OXISOL OF SOUTHERN BRAZIL
Agriculture is directly linked to atmospheric concentration of greenhouse gases (GHG) through basic processes that occur in the soil-plant system. Agricultural soils can act as a source or sink of GHG depending on the management practices adopted. The objective of this research was to evaluate the GHG flux in different soil management systems. This project w
Publicado em: 2008
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16. DESENVOLVIMENTO DE UM SISTEMA TRIAXIAL SERVO-CONTROLADO E AVALIAÇÃO DO COMPORTAMENTO MECÂNICO DE UM SOLO RESIDUAL DE BIOTITA GNAISSE / DEVELOPMENT OF A SERVO-CONTROLLED TRIAXIAL EQUIPAMENT AND EVALUATION OF MECHANICAL BEHAVIOUR OF A BIOTITE-GNEISS RESIDUAL SOIL
This dissertation presents a study of the mechanical properties of biotite gneiss residual soil found at Alto Leblon, Rio de Janeiro, and the development of a triaxial equipment for unsaturated soil testing. An experimental program has been created to study the mechanical behaviour of soil. The methodology proposed by this campaign is: (a) physical character
Publicado em: 2008
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17. Estudo fÃsico-hÃdrico em lisÃmetros e comparaÃÃo de elementos climÃticos na regiÃo de Lavras - MG / Physical-hydric study in lisymeters and comparison between climatic elements at the region of Lavras, MG,
This work aimed to compare data obtained from conventional (EMC) and automatic (EMA) meteorological stations, and to compare different methods against the standard method for estimating the reference evapotranspiration (ETo), for the region of Lavras, Minas Gerais, Brazil. The EMC data, between 2005 and 2008, were obtained from National Institute of Meteorol
Publicado em: 2008
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18. Relação solo-água-vegetação em uma toposseqüência localizada na Estação Ecológica de Assis, SP / Soil-water-vegetation relationships in a toposequence located in the Ecological Station of Assis, São Paulo, Brazil
The Cerrado bioma is being fragmented due to the human and agricultural occupation. To maintain the biodiversity, ecological corridors must be created by the revegetation and the restoration of the degraded areas. It can only be ameliorated upon the knowledge of the soils natural dynamics and distribution. The aim of this work was to characterize the b
Publicado em: 2006
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19. Balanço de energia e evapotranspiração de cafezal adensado em crescimento sob irrigação localizada. / Energy balance and evapotranspiration in a high density young coffee under located irrigation.
The objectives of this study were to evaluate the magnitude of global evapotranspiration (ETc) in a high density young coffee crop (3.5mx0.9m) under drip irrigation, the ETc partition considering hedgerows and interrows, and the partition of the available radiant energy between sensible and latent heat fluxes. The experiments were conducted from September 20
Publicado em: 2005
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20. Desenvolvimento de dispositivo para calibraÃÃo de sensor de umidade do solo e aplicaÃÃo em sensores tipo tensiÃmetro eletrÃnico e resistÃncia elÃtrica / Development of apparatus for soil moisture calibration was developed and built (DCSUS) and application in sensors electronic type an electronic tensiometer and electric resistance.
Na apparatus for soil moisture calibration was developed and built (DCSUS). The moisture was controlled indirectly by controlling the soil water matrix potenctial using both a porous plate funnel and a pressure chamber system. A 3.0 m high tower wal built in steel and a scale installed on its top. The scale components were an I-bean articulated in its center
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/09/2004
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21. Characterization of capacitive sensors for measurements of the moisture in irrigated soils
The irrigation is a technique developed to supply the hydric needs of the plants. The use of the water should be optimized so that the culture just has enough for its growth, avoiding waste. The objective of this work was to characterize the behavior of capacitive sensors of humidity to monitor the moisture in the soils. In first instance, it was appraised s
Journal of the Brazilian Society of Mechanical Sciences. Publicado em: 2002-07
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22. Simulação do coeficiente de retroespalhamneto de radar na banda C para solos nus típicos do Estado de São Paulo / Simulation of radar backscatter coefficient at C-band for typical bare soils in Sao Paulo State (Brazil)
After almost 20 years of optical orbital sensors (Landsat and SPOT), the nineties will be the decade of radar imaging systems. Since 1992, Brazil has been imaged by the orbital SAR system ERS-1. Several open questions remain regarding the new products generated by this imaging radar, e.g. the effects of target characteristics on image composition. This study
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 199403