Consulta: creatorFacets:"Santos,Gilmar O."
Registros recuperados: 7
Data/hora: 13/06/2024 00:52:33

Evaluation of sediment production and siltation in a small earth dam in Fernandópolis, SP
Provedor de dados: 70
Autores: Vanzela,Luiz S.; Grecco,Diego L. G.; Costa Neto,José N. da; Santos,Gilmar O.
The siltation is a natural process, but can be accelerated by human actions and results in major problems for the reservoirs, reducing its useful volume for irrigation. An example of this problem was the reduction of the area of mirror water of Fernandópolis municipal dam in 48.3% during 20 years. Therefore, this study aimed to evaluate the production of sediments and siltation of Fernandópolis municipal dam from a methodology that can be applied to small earth dams for agricultural purposes. For this, it was monitored, monthly throughout the year, the volume of sediment deposited in the reservoir. The percentage of retention sediment in Fernandópolis municipal dam ranged from 53.9 to 94.5%, that associated with a high specific sediment yield, will cause...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hydro-sedimentology; Use and land occupation; Erosion.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000500010

USE OF ACTIVE OPTICAL SENSOR IN THE CHARACTERISTICS ANALYSIS OF THE FERTIGATED BRACHIARIA WITH TREATED SEWAGE
Provedor de dados: 70
Autores: Santos,Gilmar O.; Rosalen,David L.; Faria,Rogério T. de.
ABSTRACT Through the use of remote sensing, the productivity and the nutritional state of the plants can be estimated in relation to the nitrogen doses due to the modification of the canopy reflectance. In this study, values of the normalized difference vegetation index (NDVI) obtained by a terrestrial optical sensor were correlated with productivity and contents of nitrogen (N) and of foliar crude protein (CP) of Brachiaria brizantha cv. Marandu, fertigated with doses of sewage treatment effluent (STE) The NDVI average rates of the forage were obtained by the active terrestrial sensor (GreenSeeker) before the harvests that were realized every 28 days in 2014. Five fertigated treatments with the following fractions of STE in water were evaluated: E5 = 1.0;...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Forage production estimation; GreenSeeker; Terrestrial remote sensing.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000601213

MORPHOGENIC AND STRUCTURAL CHARACTERISTICS OF MARANDU GRASS AFFECTED BY FERTIGATION WITH TREATED SEWAGE EFFLUENT AND CUTTING HEIGHT
Provedor de dados: 70
Autores: Dantas,Geffson de F.; Faria,Rogério T. de; Costa,Natã R.; Santos,Gilmar O.; Ferraudo,Antonio S.
ABSTRACT The response of biomass flow components of forage from the interaction between fertigation with wastewater and cutting height during the year is little known. The objective of this work was to verify the responses of morphogenic and structural characteristics of Urochloa brizantha as a function of fertigation application strategies with sewage treatment plant effluent (TSE), complemented with urea (U), associated with harvest with two plant heights during the dry and rainy periods. The forage cutting heights were 30 cm (H1) and 40 cm (H2), and nitrogen fertilization doses were 9.1 (D1), 12.1 (D2), 22.5 (D3), 26.6 (D4), and 34.0 (D5) kg of N per Mg−1 of dry matter (DM) produced, applied by TSE via fertigation, plus 7.5 kg N per Mg−1 of DM produced,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Defoliation; Nitrogen; Water reuse.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000600692

Produtividade e qualidade da brachiaria irrigada no outono/inverno
Provedor de dados: 70
Autores: Dantas,Geffson de F.; Faria,Rogério T. de; Santos,Gilmar O.; Dalri,Alexandre B.; Palaretti,Luiz F.
RESUMO Um dos fatores que determinam os baixos índices zootécnicos na pecuária brasileira é a estacionalidade da produção das plantas forrageiras tropicais. A irrigação pode proporcionar aumento e estabilização da produtividade durante o outono e o inverno. Objetivou-se pelo presente estudo avaliar: a) a produtividade de massa seca e qualidade de forragem de Brachiaria brizantha, em função de lâminas de irrigação, no período do outono e do inverno; b) a umidade do solo e a temperatura do ar a fim de determinar seus efeitos na produtividade de forragem. O experimento foi conduzido na Fazenda Experimental da FCAV-Unesp, em Jaboticabal-SP. Utilizou-se de um sistema de aspersão em linha para estabelecer tratamentos com cinco lâminas de irrigação...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brachiaria brizantha; Forragem; Irrigação.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162016000300469

A STUDY OF THE IMPACT OF LAND USE AND OCCUPATION ON BASIN WATER QUALITY THROUGH MULTIVARIATE STATISTICS
Provedor de dados: 70
Autores: Santos,Gilmar O.; Hernandez,Fernando B. T.; Ferraudo,Antonio S.; Vanzela,Luiz S.; Santos,Duílio J. O.
ABSTRACT Without effective actions to improve environmental management, water resources tend to become scarce. Thus, this study aimed to understand the processes influencing the physical, chemical, and biological properties of the water due to land uses and occupation in the Ipê stream basin, in Ilha Solteira - SP (Brazil), regarding the dependence of the analyzed variables. Monitoring of chemical, physical, and biological water quality was performed from 2006 to 2011, and the records of land use and occupation in 2011. A factorial multivariate analysis allowed us to understand that the processes in densely populated areas increased degradation of water by the input of organic loads, yet those of farming areas enhanced the degradation of the chemical and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Factor analysis; Irrigation; Land use and occupation; River basin.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000300453

Performance of drippers in two filtering systems using sewage treatment effluent
Provedor de dados: 91
Autores: Dalri,Alexandre B.; Santos,Gilmar O.; Dantas,Geffson de F.; Faria,Rogério T. de; Zanini,José R.; Palaretti,Luiz F.
ABSTRACT The objective of this study was to evaluate the performance of three models of drippers using treated sewage effluent, pure and diluted, and two types of filters, screen and disc. The treated sewage effluent used in the experiment was collected from the city’s treatment plant. The experiment included 12 lateral lines with three types of emitters to apply pure (100%) and diluted (50%) effluent filtered by screen and disc filters. The combination of those factors set the treatments: T1 (50% effluent diluted in fresh water filtered by a screen filter); T2 (50% effluent diluted in fresh water filtered by a disc filter); T3 (pure effluent filtered by a screen filter); T4 (pure effluent filtered by a disc filter). The results showed that the flat type...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Wastewater; Emitters; Filter; Reuse; Irrigation.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000600363

Uso do solo e monitoramento dos recursos hídricos no córrego do Ipê, Ilha Solteira, SP
Provedor de dados: 91
Autores: Santos,Gilmar O.; Hernandez,Fernando B. T.
O Brasil possui grande potencial hídrico porém com deficiência em termos de monitoramento qualitativo, quantitativo e conhecimento das influências do uso do solo. Assim, realizou-se trabalho com o propósito de apresentar o monitoramento qualitativo e quantitativo das águas para fins de irrigação e as influências ocasionadas pelo uso e ocupação do solo na microbacia do córrego do Ipê, município de Ilha Solteira, São Paulo. O monitoramento qualitativo foi realizado no período de 2006 a 2011 e o quantitativo de 2009 a 2011. Para se constatar as influências utilizou-se a análise de correlação de Pearson. Verificou-se que, em sua maior parte, a microbacia é composta pela cultura de cana-de-açúcar e o maior uso em conflito com as áreas de preservação permanente...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ocupação do solo; Qualidade de água; Correlação estatística.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662013000100009