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ENTUPIMENTO DE GOTEJADORESEM DECORRENCIA DE PULSOSDE PARTICULAS SOLIDAS NA MALHA HIDRAULICA  Rubens Duarte Coelho1; Luiz Artur Alvarenga Vilela2; Ronaldo Souza Resende1; Marconi Batista Teixeira1; Jocelito Sacol de Sa11Departamento de Engenharia Rural, Escola Superior de Agricultura Luiz de Queiroz, Universidade de Sao Paulo, Piracicaba, SP, rdcoelho@esalq.usp.br2In memorian  1 RESUMO Ruptura de tubulacoes em sistemas de irrigacao resulta, inevitavelmente, na entrada de particulas solidas do solo, as quais podem entupir gotejadores. Em experimento realizado em condicoes de laboratorio, foi avaliada a sensibilidade de cinco modelos de gotejadores ao entupimento de causa fisica, atraves da simulacao de pulso de sujeira com solo, em funcao do tempo de operacao, da posicao de instalacao do gotejador na linha terciaria e da textura do solo. Os resultados demonstraram ser o fator posicao de instalacao do emissor de maior preponderância em relacao a fatores de textura do solo e tempo de operacao. Os modelos Ram e Tiran apresentaram menor sensibilidade ao pulso, enquanto os modelos Streamline, Dripline e Typhoon mostraram desempenho inferior. UNITERMOS: obstrucao fisica, gotejamento, pulso de sujeira COELHO, R. D.; VILELA, L. A. A.; RESENDE, R. S.; TEIXEIRA, M.B.; SA, J. S. de. DRIP CLOGGING BY DIRTINESS PULSE OCCURRENCE  2 ABSTRACT An experiment was conducted at The Laboratory of Irrigation in The Department of Rural Engineering, ESALQ, USP,Piracicaba-SP,Brazil, in order to evaluate different dripper designs for physical clogging potential to dirtiness pulse by soil intake in pipeline. System operation time, emitter connection point and soil texture were evaluated. The results showed that emitter connection point was more sensitive to plugging potential than soil texture and system operation time. There were significant differences among emitter models in relation to clogging potential. Ram andTiranmodels had better performance than Streamline, Dripline and Typhoon ones. KEYWORDS: physical plugging, drip irrigation, dirtiness pulse

ENTUPIMENTO DE GOTEJADORES EM DECORRÊNCIA DE PULSOS DE PARTÍCULAS SÓLIDAS NA MALHA HIDRÁULICA