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Higher Study | Hydrology
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The most suitable chemical which can be applied to the water surface for reducing evaporation is
ক
Methyl alcohol
খ
Ethyl alcohol
গ
Cetyl alcohol
ঘ
Butyl alcohol
Which of the following methods is used to estimate flood discharge based on high water marks left over in the past ?
ক
slope-area method
খ
area-velocity method
গ
moving boat method
ঘ
ultra-sonic method