1.15A lake has a surface area of 14km?. From an inventory of streams flowing into a lake, it is estimated that the average inflow rate in a given day is50m

/s; the average outflow rate is 25m/s; and in the same day lake stage(the water level) increases 14.7cm. Neglecting groundwater flow, estimate the average evaporation rate in mm/day.

Fig: 1