Abstract:
A study was conducted in the Ganges-Kobadak (G-K) irrigation
project of Bangladesh during the ,Kharif-I (dry) season of 1978.
Different aspects of water use for lowland rice and the corresponding
irrigation water supply in the selected areas of the project were
studied.
, Results of the study revealed that seepage and percolation
'losses varied from 3.88 to 6.96 mm/day and the net water use i.e.
evapotranspiration plus seepage and percolation ranged from 7.82 to 10.90
mm/day in different areas. Water supplied through the canals was found
to be much more than the actual requirement and comparatively higher
water supply was observed at the upstream areas. Also, no definite
schedule.of water supply was found to exist in the system. High water
use efficiency was found at the downstream areas compared to the upstream
areas.indicating excessive loss of the supplied water at the
upstream areas. On the other hand, the water adequacy was observed to
be higher in 'the -areas nearer to the source of water.
