A reservoir with a surface area of 250 hectares had the following averagevalues of climate parameters during a week: Water temperature = 20°C,Relative humidity = 40%, Wind velocity at 1.0 m above ground surface = 16 km/h.Estimate the average daily evaporation from the lake by using Meyer’s formula.(b) An ISI Standard evaporation pan at the site indicated a pan coefficient of 0.80 on the basis ofcalibration against controlled water-budgeting method. If this pan indicated an evaporation of 72mm in the week under question, (i) estimate the accuracy if Meyer’s method relative to the panevaporation measurements. (ii) Also, estimate the volume of water evaporated from the lake inthat week.Solution(a) From Table 3.3

• Write a hydrologic budget equation for the scenarios below, and calculate the change in storage. Also write whether the hydrologic budget is at a loss, a gain, or at steady state. 1. Precipitation = 72 in/yr 2. Evapotranspiration = 59 in/yr 3. Surface water Runoff = 9.6 in/yr 4. Groundwater pumping = 3.4 in/yr

Water vapour and account for about _______per cent of the natural greenhouse effectQuestion 6Answera.70 to 80b.60 to 70c.80 to 90d.50 to 60

Review InstructionsA full pool in a backyard initially has 13.7m313.7m 3 of water in it. On a hot day, 0.8m30.8m 3 evaporates.  Calculate the percentage of water in the pool that has evaporated.

formular for calculating heat lost with water vapour

ii. Calculate the average change of dissolved oxygen per year in the lake over the course of the study. Show your work.