If ewand ea are the saturated vapour pressures of the water surface and air respectively, the Dalton’s law for evaporation EL in unit time is given by EL =
The average pan coefficient for the standard US Weather Bureau class A pan is
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A canal is 80 km long and has an average surface width of 15 m. If the evaporation measured in a class A pan is 0.5 cm/day, the volume of water evaporated in a month of 30 days is (in m3) : -
The chemical that is found to be most suitable as water evaporation inhibitor is
The rainfall on three successive 6-h periods are 1.3, 4.6 and 3.1 cm. If the initial loss is 0.7 cm and the surface runoff resulting from this storm is 3 cm, the φ-index for the storm is
If for a given basin in a given period, P - precipitation, E = evapotranspiration R = total runoff and ΔS - increase in the storage of water in the basin, the hydrological water budget equation states
31 docs|280 tests
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31 docs|280 tests
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