SEEPAGE FLOW DYNAMICS IN A NEGATIVE PRESSURE DIFFERENCE IRRIGATION SYSTEM

S. M. MONIRUZZAMAN, Teruyuki FUKUHARA, Masaki ITO, Yoshihiro ISHII
2011 Journal of Japan Society of Civil Engineers Ser B1 (Hydraulic Engineering)  
This study proposes a theoretical model to predict soil wetting pattern and water balance in a negative pressure difference irrigation (NPDI) system and describes laboratory experimental results from which this model was derived. The experiments were conducted by using a porous pipe, a water reservoir and a soil column filled with Kawanishi sand. The temporal variations in volumetric water content profile, supplied water, soil water storage and evaporation were calculated by the proposed model.
more » ... the proposed model. The calculated results were in good agreement with the experimental results. The margin of error of the water balance was in the range of 3 to 7 %. It is concluded that the proposed model is valid for an optimal design of the NPDI system.
doi:10.2208/jscejhe.67.i_97 fatcat:zy74evwcxbc5tdm6dwk3shx2wm