Monthly Reservoir Evaporation Rates for Texas, 1940 Through 1957

摘要

One of the many variable factors in hydrology which has received intensive study has been the climatic process of evaporation. Investigations have been made under laboratory and field conditions in an attempt to determine and evaluate the many factors inherent 10 this process. Various related climatic phenomena have been found to influence the rate of evaporation, the most important of which are temperature, precipitation, humidity, and wind movement. Perhaps the most widely investigated evaporation factor has been the relationship between evaporation measured from various types of pans and actual reservoir evaporation. These investigations offer convincing evidence of the importance of the evaporation process in water-supply analyses. Evaporation losses are of prime importance in Texas since some of the highest evaporation rates ever observed have been recorded here. However, since a great variance in related climatic factors occurs in Texas, there is a wide variability in the evaporation rates between the eastern and western parts of the State.