Hello, I have a swimming pool with a waterfall feature. I need to know how much does the waterfall contributes to cooling the pool. I tried to use Newton's law of cooling, but I have a problem with the Heat Transfer Coefficient in this case. Following are the Givens: Waterfall Width= 5m Waterfall Height= 1m Waterfall Thickness= 1cm Waterfall Flow Rate= 100 m3/Hr Water Temperature= 26 C Air Temperature= 20 C I need to Find Q (in Watts). Could someone help. Many Thanks.