scholarly journals ANÁLISE DOS COEFICIENTES DE UNIFORMIDADE DE APLICAÇÃO DE MICROASPERSORES

Irriga ◽  
2018 ◽  
Vol 1 (01) ◽  
pp. 89
Author(s):  
Luiz Fabiano Palaretti ◽  
José Renato Zanini ◽  
Diego Augusto Vechiato ◽  
Alexandre Barcellos Dalri ◽  
Rogério Teixeira de Farias
Keyword(s):  
Constant Pressure ◽  
Test Time ◽  
State University ◽  
University Campus ◽  
Water Application ◽  
Uniformity Coefficient ◽  
Operating Range ◽  
Coefficient Variation ◽  
Total Absence ◽  
Distribution Uniformity

ANÁLISE DOS COEFICIENTES DE UNIFORMIDADE DE APLICAÇÃO DE MICROASPERSORES  LUIZ FABIANO PALARETTI1; JOSÉ RENATO ZANINI1; DIEGO AUGUSTO VECCHIATO1; ALEXANDRE BARCELLOS DALRI1 E ROGÉRIO TEIXEIRA DE FARIA1  1Departamento de Engenharia Rural, FCAV/Unesp, Via de acesso Prof. Paulo Donato Castellane, s/n, 14884-900, Jaboticabal, São Paulo, Brasil, email: [email protected], [email protected], [email protected], [email protected],  [email protected]  1 RESUMO O objetivo deste trabalho foi analisar a uniformidade de aplicação de água e o padrão de molhamento dos microaspersores DAN 2001 e DAN 2002, conforme a ABNT (2004). O ensaio foi conduzido na Universidade Estadual Paulista, Jaboticabal, SP. O tempo de teste foi de 1 hora sob pressão constante de 250 kPa e total ausência de vento, com 3 repetições. Foram determinados os coeficientes de uniformidade de distribuição (CUD) e de Christiansen (CUC) e o padrão de molhamento dos microaspersores. Os valores médios de CUC para ambos os microaspersores foi classificado como “bom” alcançando 80,22% e 83,21% para o DAN 2001 e DAN 2002, respectivamente. Os valores médios de CUD foram 71,35% (DAN 2001) e 75,39% (DAN 2002), ambos classificados como “bom”. Os valores médios de CUC e CUD não diferiram entre si pelo teste de Tukey (p³0.05), apresentando valores de coeficiente de variação de 6,52 e 10,77, respectivamente. O padrão de molhamento apresentou maiores intensidades de aplicação (4,0 – 5,0 mm h-1) nos primeiros 0,25 m de distância do microaspersor, decrescendo com o aumento da distância, com intensidades de 2,0 a 3,0 mm h-1 a 2,25 m. Palavras-chave: sobreposição, emissores, raio de alcance  PALARETTI, L. F.; ZANINI, J. R.; VECCHIATO, D. A.; DALRI, A. B.; FARIA, R.  T. ANALYSIS OF APPLICATION UNIFORMITY COEFFICIENT OF THE MICROSPRINKLERS  2 ABSTRACT  The aim of this study was to analyze water application uniformity and wetness pattern of microsprinklers DAN 2001 and DAN 2002 according to ABNT NBR (2004). The test was conducted in Paulista State University, campus of Jaboticabal, SP. The test time was 1 hour under a constant pressure of 250 kPa and total absence of wind, with 3 replications. The distribution uniformity coefficient (CUD); uniformity (CUC) and wetness pattern of microsprinklers were determinated. The average values of CUC for both microsprinklers were described as   "good", reaching 80.22 and 83.21% for the DAN 2001 and DAN 2002, respectively. The average values of CUD were 71.35% (DAN 2001) and 75.39% (DAN 2002), both described as "good". The average values of CUC and CUD did not differ in Tukey tests (p³0.05), with coefficient variation values of 6.52 and 10.77, respectively. The wetness pattern showed higher intensities application (4.0 to 5.0 mm h-1) for the first 0.25 m distance from the microsprinklers, decreasing with increasing distance, with intensities from 2.0 to 3.0 mm h-1 at 2.25 m. Keywords: overlapping, emitters, operating range

scholarly journals Effect of Pulsating Pressure on Water Distribution and Application Uniformity for Sprinkler Irrigation on Sloping Land

Water ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 913 ◽  
Author(s):  
Lin Zhang ◽  
Boyang Fu ◽  
Naiwang Ren ◽  
Yu Huang
Keyword(s):  
Distribution Pattern ◽  
Flow Rate ◽  
Complex Terrain ◽  
Water Distribution ◽  
Constant Pressure ◽  
Sprinkler Irrigation ◽  
Water Application ◽  
Uniformity Coefficient ◽  
Sloping Land ◽  
Distribution Uniformity

Crops are highly susceptible to drought in sloping land. Due to its good adaptability to complex terrain, sprinkler irrigation is one of the commonly used methods for sloping land. To improve water application uniformity for sprinkler irrigation on sloping land, an experiment was conducted on an artificial slope to determine the effects of pulsating versus constant pressure on sprinkler flow rate, radius of throw, water distribution pattern, and water application uniformity. Compared with sprinkler flow rate and water distribution uniformity at constant pressure, sprinkler flow rate was not reduced, but water distribution uniformity for a single sprinkler was improved due to the decreased uphill throw, downhill throw and the ratio of downhill throw to uphill throw at pulsating pressure. The Christiansen Uniformity Coefficient (CU) value of water distribution for a single sprinkler at pulsating pressure was about 10% higher than that of constant pressure. When water distribution of single sprinkler overlapped with rectangular arrangement, CU values for pulsating pressure were on average 4.06% higher than those for constant pressure with different sprinkler spacings. Thus, pulsating pressure is recommended for use in sprinkler irrigation on sloping land to improve water application uniformity.

scholarly journals AVALIAÇÃO DA UNIFORMIDADE DE APLICAÇÃO DE ÁGUA EM GOTEJADORES EM FUNÇÃO DO TEOR DE FERRO

Irriga ◽  
2011 ◽  
Vol 16 (1) ◽  
pp. 21-30 ◽  
Author(s):  
Rigléia Lima Brauer ◽  
Raimundo Leite Cruz ◽  
Roberto Lyra Villas Bôas ◽  
Talita Aparecida Pletsch
Keyword(s):  
Test Bench ◽  
Operating Time ◽  
Chemical Precipitation ◽  
State University ◽  
Uniformity Coefficient ◽  
Agricultural Engineering ◽  
Paulo State ◽  
Significant Difference ◽  
Distribution Uniformity ◽  
Operational Time

1 RESUMO Este trabalho teve por objetivo estudar a variação de vazão em tubogotejadores NaanPC laranja e NaanPC azul em função  de precipitados químicos, ao longo do tempo de funcionamento, quando submetidos a uma água rica em ferro, avaliando-se especificamente o coeficiente de uniformidade de Christiansen (CUC) e o coeficiente de uniformidade de distribuição (CUD). O experimento foi desenvolvido em uma bancada de ensaios para tubogotejadores no Laboratório de Ensaio de Equipamentos para Irrigação do Departamento de Engenharia Rural da Faculdade de Ciências Agronômicas - UNESP, localizado no município de Botucatu – SP. O experimento foi montado em esquema fatorial 2x2x7, sendo duas doses de Fe, dois modelos de gotejadores e sete tempos de funcionamento, com três repetições, totalizando 84 parcelas experimentais. Efetuou-se a análise de variância pelo teste F. As médias das vazões dos gotejadores foram comparadas pelo teste de T de Student a 5% de probabilidade. Os resultados obtidos não apontaram diferença significativa nas diferentes doses de ferro. Entretanto, os resultados apontaram diferença significativa na interação gotejador x tempo e coeficiente de uniformidade de Christiansen (CUC). UNITERMOS: coeficiente de uniformidade de Christiansen(CUC), coeficiente de uniformidade de distribuição (CUD), entupimento de emissores.  BRAUER, R.L; CRUZ, R. L; VILLAS BÔAS, R. L.; PLETSCH, T. A.EVALUATION OFWATER APPLICATION UNIFORMITY IN DRIPPERSIN FUNCTION OF IRON CONTENT 2 ABSTRACT This work aimed to study the occurrence of chemical precipitates effects in two types of drip hose (NaanPC orange and blue) due to chemical precipitation along the  operating time, when subjected to water rich in iron, specifically evaluating the Christiansen uniformity coefficient (CUC) and distribution uniformity (DU). The experiment was conducted in a test bench for  drip hose at Laboratory Test Equipment for Irrigation - Department of Agricultural Engineering, Sao Paulo State University. The experiment was a 2 x 2 x 7 factorial design, with two Fe doses, two drip brands, and seven operational times with three replicates, totalizing 84 experimental plots. The variance analysis was performed by F test. Average emitter discharges were compared by Student t test at 5% probability. The results showed no significant difference in iron doses. However, the results indicated significant differences in drip versus operational time and the Christiansen uniformity coefficient (CUC).  KEYWORDS: Uniformity coefficient of Christiansen(CUC), distribution uniformity (DU), emitter clogging.

scholarly journals Spatial variability of available water and micro-sprinkler irrigation in cambisol

Revista CERES ◽  
2016 ◽  
Vol 63 (6) ◽  
pp. 782-788
Author(s):  
Larissa Luana Nicodemos Ferreira ◽  
Luis César de Aquino Lemos Filho ◽  
Marcílio Macêdo Torres ◽  
Raimundo Fernandes de Oliveira Júnior ◽  
Clara Nívea Costa do Vale ◽  
...  
Keyword(s):  
Spatial Variability ◽  
Flow Rate ◽  
Sprinkler Irrigation ◽  
Sprinkler System ◽  
Water Application ◽  
Uniformity Coefficient ◽  
Water Capacity ◽  
Available Water ◽  
Available Water Capacity ◽  
Distribution Uniformity

ABSTRACT The technology of irrigation is vital for agricultural production. Thus, description of spatial patterns of both water application and available water capacity in the soil, as well as their interactions, is essential to maximize efficiency of water use in irrigated areas. The objective of this study was to analyze spatial variability of available water capacity in the soil and water application via irrigation using geostatistics. The experiment was conducted in a commercial mango orchard in Cambisol irrigated by micro sprinkler system, in the municipality of Alto do Rodrigues, RN. Analyses of descriptive statistics and geostatistics were performed using the programs GeoR and GS+. Geostatistics was found suitable for describing the structure of spatial dependence of available water capacity in the soil and the flow rate distributed in the area by sprinklers. Moreover, even with good results for Christiansen Uniformity Coefficient (CU) and Distribution Uniformity Coefficient (DU), the area showed spatial variability of flow rate.

scholarly journals Estimating Demand for a New Travel Mode in Boise, Idaho

2021 ◽  
Vol 13 (3) ◽  
pp. 1209
Author(s):  
Mandar Khanal
Keyword(s):  
Road Network ◽  
Travel Demand ◽  
Stated Preference ◽  
State University ◽  
University Campus ◽  
City Center ◽  
Road Congestion ◽  
The Us ◽  
Potential Mode ◽  
The City

The 20,000-student Boise State University campus is located about 3 km from the center of the city of Boise. There is a significant amount of travel between the campus and the city center as students and staff travel to the city to visit restaurants, shops, and entertainment centers. Currently, people make this trip by car, shuttle bus, bike, or walking modes. Cars and shuttle buses, which share the same road network, constitute about 76% of the total trips. As road congestion is expected to grow in the future, it is prudent to look for other modes that can fulfill the travel demand. One potential mode is an aerial tramway. However, an aerial tramway is not a common mode of urban travel in the US. This research describes how the stated preference method was used to estimate demand for a mode that does not currently exist. An online stated preference survey was sent out to 8681 students, faculty, and staff and 1821 valid responses were received. Only about 35% of the respondents expressed their willingness to choose an aerial tramway for various combinations of cost and convenience of the new mode. Respondents were also found to favor convenience over cost for the new mode.

scholarly journals Development vectors for the NNSUACE campus

2020 ◽  
pp. 157-166
Author(s):  
Anna Gelfond ◽  
Andrei Lapshin
Keyword(s):  
Public Space ◽  
Architectural Design ◽  
Civil Engineering ◽  
Symbiotic Relationship ◽  
State University ◽  
University Campus ◽  
Principal Tool ◽  
The University ◽  
Education Science

The Nizhny Novgorod State University of Architecture and Civil Engineering (NNSUACE) campus is located in Zapochainie, a historical area in Nizhny Novgorod, so the issues of revitalization of the historico-architectural environment and those concerning the methods of architectural design are interwoven in the text. The symbiotic relationship between education, science and practice used as a principal tool for the training of architects at NNSUACE made it possible to envision the evolution of the university campus. The article presents the projects proposed by professional architects and students in response to the need to meet both practical and ideological challenges – to transform the university campus into a viable public space.

scholarly journals DIAGNÓSTICO DA APLICAÇÃO DE ÁGUAS RESIDUÁRIAS DA SUINOCULTURA NA CAFEICULTURA IRRIGADA II. AVALIAÇÃO DA UNIFORMIDADE DE APLICAÇÃO DE ÁGUA

Irriga ◽  
2006 ◽  
Vol 11 (3) ◽  
pp. 402-141
Author(s):  
Roberta Alessandra Bruschi Gonçalves ◽  
Everardo Chartuni Mantovani ◽  
Márcio Mota Ramos ◽  
Luiz Otávio Carvalho de Souza
Keyword(s):  
Irrigation System ◽  
Crop Productivity ◽  
Distribution Coefficients ◽  
Minas Gerais ◽  
Water Application ◽  
Coffee Plantations ◽  
Uniformity Coefficient ◽  
Filtration System ◽  
Irrigation Uniformity ◽  
Minas Gerais State

DIAGNÓSTICO DA APLICAÇÃO DE ÁGUAS RESIDUÁRIAS DA SUINOCULTURA NA CAFEICULTURA IRRIGADAII. AVALIAÇÃO DA UNIFORMIDADE DE APLICAÇÃO DE ÁGUA  Roberta Alessandra Bruschi Gonçalves; Everardo Chartuni Mantovani; Márcio Mota Ramos; Luiz Otávio Carvalho de SouzaDepartamento de Engenharia Agrícola, Universidade Federal de Viçosa , Viçosa-MG, [email protected]  1 RESUMO             A uniformidade de aplicação de água influencia diretamente a produtividade das culturas, que tende a aumentar com a uniformidade de irrigação. O objetivo deste trabalho foi determinar os coeficientes de uniformidade de distribuição de água residuária da suinocultura (ARS) em 6 propriedades cafeeiras, que aplicam ARS via sistema de irrigação, localizadas em 5 diferentes municípios da região de cerrado de Minas Gerais. Do total de sistemas avaliados, 50% apresentaram coeficientes de uniformidade de distribuição de água residuária (CUC/CUD) abaixo do recomendado. Os melhores resultados estão associados ao sistema de irrigação localizada por gotejamento, mostrando a viabilidade da utilização do mesmo, desde que haja manejo adequado ao longo de todo o processo de tratamento do efluente, inclusive no sistema de filtragem do equipamento. UNITERMOS: café, reuso, irrigação GONÇALVES, R. A. B.; MANTOVANI, E. C.; RAMOS, M. M.; SOUZA, L. O. C. de; ANALYSIS OF SWINE CULTURE WASTEWATER APPLICATION ON IRRIGATED COFFEE CROP  -  II. EVALUATION OF WATER APPLICATION UNIFORMITY  2 ABSTRACT            Water application uniformity influences crop productivity that is likely to increase with irrigation uniformity. The objective of this work was to determine the uniformity distribution coefficients of swine culture wastewater on coffee plantations (SCW); the analysis was carried out on 6 farms in the Minas Gerais State cerrado region that use SCW through their irrigation system. Half of the assessed systems presented water application uniformity coefficient below the recommended limit. The best results were associated to drop irrigation, showing the viability of this irrigation system use if there is an appropriate management throughout the entire treatment process, including equipment filtration system management. KEYWORDS: coffee, irrigation, reuse

scholarly journals Diversity of Tree Species in Rivers State University, Port Harcourt, Nigeria

2021 ◽  
pp. 67-72
Author(s):  
P. C. Nnadi ◽  
B. B. Otene ◽  
Nwiisator David-Sarogoro
Keyword(s):  
Plant Species ◽  
Tree Species ◽  
Dominant Species ◽  
Species Abundance ◽  
State University ◽  
University Campus ◽  
Management Interventions ◽  
Port Harcourt ◽  
Pinus Spp ◽  
Rivers State

This study was carried out to examine the distribution of plant species in Rivers State University campus at different locations at the Rivers State University Nkpolu-Oroworukwo Port Harcourt Nigeria. The general objective of this study was to examine the Ecological distribution of plant species in Rivers State University campus at different locations. The specific objective was to determine the species abundance of various plants in the study area and also to examine the ecological diversity of tree species in the various groups. The study area was divided into three groups (stations) with the various plants species identified and recorded. Data gotten from the field was analyzed using descriptive statistic and some ecological indices such as Margalef, Mehinick, Shannon diversity, Shannon Wiener, Evenness/Equitability and Simpson dominance.  A total of one thousand Sixty-nine (1069) individual plant were identified with 16, 17 and 12 species in stations 1-3 respectively. The highest individual plants (561) were observed in station 1 while the least (87) were observed in station 3. The mean values of stations 1 and 2 were significantly and statistically different from site 3 at p<0.05. The results obtained showed some dominant species to include Elaeis guincensis, Polyaithia longifolia, Pinus spp, Gmelina arborea, Wodyetia bifareata, Citrus sinensis, Cocos nuciferia while others were the least dominant species found in the study area. The Margalef, Mehinicks and Shannon Wiener values were consistently highest in station 2 but lowest in station 3.  Human disturbances had negative impact on tree species abundance especially in site 3. It is therefore recommended that management interventions are necessary in other to stop indiscriminate felling of the various trees species that made up the different groups.

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