Green Global
Foundation   Journal
...an emerging window for scientific research and publication across the globe

HYDRAULIC PROPERTIES OF BURIED PIPE DISTRIBUTION SYSTEM IN DIFFERENT SCHEMES (Pages : 22 - 32)

A research work was conducted on buried pipe distribution systems in four different DTW irrigation schemes that’s one conducted in the experimental field of the Department of Irrigation and Water Management in Bangladesh Agricultural University, Mymensingh and another three located in the villages of Alokdia, Dhitpur and Chongachain the sadarupazilla of Sirajganj district. The main objectives of the study were to determine the hydraulic properties of flow through buried pipes made of different materials and diameters. In Mymensingh scheme, two piezometers; were fitted to the buried pipe system and in Sirajganj schemes, air vents of the buried pipe were used as piezometers to calculate hydraulic gradient line along the length of the pipe. The flow rate was measured by a cutthroat flume, placed in the open channel several meters away from the outlet of the buried pipe. The study shows that hydraulic properties of buried pipe such as frictional, entrance and exit losses, as well as friction factor are nonlinearly related to velocity of flow. Frictional, entrance and exit losses, as well as friction factor are significantly smaller in PVC pipe compared to CC pipes for the same velocity of flow. Exit loss is greater than the entrance loss except very low flow rates. As the loss of head in PVC pipe is significantly smaller than that in CC pipe, the PVC pipe is recommended for long buried pipe lines.Download