Application of unsteady flow analysis in designing a multiple outlets sprinkler irrigation system

作     者：Man Chi Trung Nishiyama, Soichi Anyoji, Hisao 

作者机构：Tottori Univ Grad Sch Agr Sci Minami Ku Tottori 6808553 Japan Yamaguchi Univ Fac Agr Yamaguchi 7530815 Japan Tottori Univ Arid Land Res Ctr Tottori 6800001 Japan 

出 版 物：《PADDY AND WATER ENVIRONMENT》 (谷物与水环境)

年 卷 期：2007年第5卷第3期

页      面：181-187页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 0828[工学-农业工程] 08[工学] 0901[农学-作物学] 

主　　题：Lateral pressure head equation Computer program Hydraulic analysis Drip irrigation 

摘      要：A simplified method has been developed for designing and calculating sprinkling systems by cutting lines across laterals at points next to the first sprinkler with a view to divide the system into two separate parts;field and basic. Equations of lateral pressure heads were used to express the relationship between inlet pressure head and velocity of the flow pumped to laterals on the field part. The above equations were then used to set up calculating conditions for the Basic part by unsteady flow method in order to define head and discharge at downstream end of the pipe in the Basic part. The forward step method was used for determining distributions of the pressure head and the emitter discharge along each lateral. A calculating schema on computer has been carried out in order to apply the method to any sprinkling system. The procedure of analysis and calculation showed that this method is generally accurate, simple and rapid.