S. A reservoir is located in a semi-arid region. A weather station near the proj

Question

S. A reservoir is located in a semi-arid region. A weather station near the project site has 35 years of rainfall data and solar radiation data. Find the evaporation rate. A pan at the site observed the evaporation for one year. The evaporation record for the pan showed the loss of water as follows, what should be estimated annual evaporation depth for the proposed reservoir? (10%) Month Evaporation loss in parn (inches) 2.5 3.1 4.6 7.4 10.7 11.9 Month Evaporation loss in pan January February March April May June August September October November December 13.8 12.7 10.5 8.2 5.4 3.8

Explanation / Answer

Simply add the evaporation losses for all months = 2.5+3.1 + 4.6 .... +3.8 = 94.6 inches per year.

Average monthly evaporation = 94.6/12= 7.88333 inchees per month.

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