EVALUATION OF SEEPAGE LOSSES FROM LINED AND UNLINED IRRIGATION CANAL
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Keywords:
Conveyance Efficiency, Inflow-Outflow, Irrigation Canal, Seepage LossAbstract
Water is an extremely valuable natural resource. When this valuable resource travels through
the canal, some of the water is lost due to seepage. Seepage is a primary source of water loss during
transportation. The primary goal of this research is to estimate seepage loss. from two different types of
lined canals plain cement concrete (PCC) lined canal and bricked lined canal and one branch canal which
is unlined. The most accurate way to measure seepage loss is to use the inflow-outflow approach. This
research was commenced at PCC lined canal from RD 00+00 to RD 68+500, brick lined canal from RD
68+500 to 131+00 and Unlined canal from RD 00+00 to RD 47+00 which originate from head Pakka of
Thal canal, Mianwali. The result shows that the average losses in PCC canal, brick canal and unlined
canals were 2.25%, 6.04% and 19.07% respectively. The average conveyance efficiency of unlined canal
is 81.93% which is very low as compared to PCC and brick canals 97.75% and 93.96% respectively. It
was estimated that PCC and brick lining will reduce the seepage losses by 16.82% and 13.03%
respectively.
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