Data/hora: 17/06/2024 08:26:04

Biblioteca(s): 	Embrapa Milho e Sorgo.	
Data corrente: 	14/04/1999	
Data da última atualização: 	11/06/2018	
Autoria: 	ANDRADE, C. de L. T. de; WELLS, R. D.; ALLEN, R. G.	
Afiliação: 	CAMILO DE LELIS TEIXEIRA DE ANDRADE, CNPMS.	
Título: 	SPRINKMOD - pressure and discharge simulation model for pressurized irrigation systems. 2. Case study.	
Ano de publicação: 	1999	
Fonte/Imprenta: 	Irrigation Science, New York, v. 18, p. 149-156, 1999.	
Idioma: 	Inglês	
Conteúdo: 	A computer model, SPRINKMOD, was tested with field data collected from a complex sprinkler irrigation system in operation. The original data collected were adjusted in order to calibrate the model for the irrigation system. Five modifications were made in the original data so that the model sensitivity could be evaluated. The model predicted the system operating point with less than 1% error, after some adjustments in the data. The relative mean standard error was 4.1% for the upstream pressure heads and 2.1% for the downstream pressure heads of all laterals analyzed together. Measurement of pressure and discharge at pump stations along with a reasonable estimate of leakage appears to be essentials for simulation of old systems. Adjustments made to pipe wall thickness and pipe roughness were not as important as the adjustments made to the lateral valves closure in getting SPRINKMOD to simulate pressure heads that were close to the measured values. For long laterals, like center pivot laterals, a variable local loss coefficient for flow past a riser outlet worked better than a fixed value of 0,3.	
Palavras-Chave: 	Avaliacao; Calibracao; Evaluation; Leakage; Model; Modelo; Simulation; Sprinker; Vazamento.	
Thesagro: 	Aspersão; Irrigação; Simulação.	
Thesaurus Nal: 	calibration; irrigation.	
Categoria do assunto: 	X Pesquisa, Tecnologia e Engenharia	
Registro original: 	Embrapa Milho e Sorgo (CNPMS)	
Exemplares: 	CNPMS - (10639-1) - UPC - AP - DD -  -  -  - DIS