Following is the recorded data of a 0.8 km2 wide lake collected over a year: It receives a total rainfall of 1400 mm, the surface inflow and outflow is 0.15 m3/s and 0.17m3/s respectively. If the surface elevation of lake reduces by 45 mm over the year, then determine the lake evaporation (in mm).
Following is the recorded data of a 0.8 km2 wide lake collected over a year:
It receives a total rainfall of 1400 mm, the surface inflow and outflow is 0.15 m3/s and 0.17m3/s respectively. If the surface elevation of lake reduces by 45 mm over the year, then determine the lake evaporation (in mm).
Given:
Duration = 1 year
Area of lake = 0.8 km2
Precipitation, P = 1400 mm
Surface water inflow, Qsi = 0.15 m3/s
Surface water outflow, Qso = 0.17 m3/s
Difference in the surface elevation = -45 mm (the negative sign is used due to the reduction in the surface elevation)
The water-balance equation is given by,
The depth of surface water inflow in a year is calculated as,
The depth of surface water outflow in a year is calculated as,
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