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1 Rozbicka K.

1 2001

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Wielomianowy model przebiegu parowania na podstawie ewaporometru Wilda w rejonie Ursynowa

Rozbicka K.

Przegląd Naukowy Inżynieria i Kształtowanie Środowiska

2001

Vol. 10, No. 2

179--186

Function describing seasonal course of evaporation assumes the polynomial form. Stepwise variable selection of multiple regression analysis (used in this work) makes possibile investigation many of polynomial shapes and selection the best of them. All data of evaporation were divided into three different types of days: sunny days, cloudy days and all days. Polynomial calculated for all days accomplish the best statistical characteristics. Polynomial for cloudy days has little worse characteristics probably because evaporation is more difficult during these days (appearance of precipitation and high walues of air humidity). Table 1 shows polynomial equations course of evaporation for three types of days. Figure 1 and 2 shows course of real evaporation and seasonal polynomial equations course of evaporation.