Simulation of infiltration characteristics of porous ceramic emitter under non-pressure condition
In order to research the infiltration characteristics of porous ceramic emitter buried in soil,a flow model of porous ceramic emitter under non-pressure condition was constructed on the base of the principles of soil water dynamics and previous studies about water soil potential around the porous ceramic emitter.An indoor soil bin experiment was carried out to verify the accuracy of the model.The results indicate that the model presented in this paper could be used to simulate the flow phenomena of the porous ceramic emitter under non-pressure condition.The predictions of the model are consistent with the experimental data.When the working pressure is 0 m,the basic cause of soil water content change is the change of the emitter discharge change,which decreases gradually with the increase of water contents around the emitter.When the soil water content is saturated,the emitter discharge would be stopped.When the soil moisture is dissipated,the flow would recover from emitter again,and the discharge is approximately equal to soil evaporation capacity.Therefore,the emitter discharge would supply the soil water content in time.This paper provides a reference for the popularization and application of porous ceramic emitter.
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NSTL
万方数据
维普
