Trend analysis of the pan evaporation in different climates of Hormozgan province

Loss of water through evaporation is a major consideration in the design and management of water supply reservoirs, water resource management and cultivation pattern. The linkages between evaporation and climate change are still not fully understood and an improved understanding of evaporation processes may assist in more accurately modelling evaporation in general circulation models. Therefore, the province of Hormozgan is determined based on expanded De Martonne climatic classification method, classified into 3 classes of climate and in period from 1974-75 to 2012-13. All data have been checked for normality test with the Kolmogorov-Smirnov test. Time trend of this variable were analyzed normality data and analyzed using non-parametric statistical methods (Mann- Kendall test and rho-Spearman coefficient) and parametric statistics (least squareregression analysis and Pearson correlation coefficient). Result shown significantly decreasing trend while the extremely warm- arid and the extremely warmextremelyarid climates and increasing trend in the warm- arid regions. Further trend analysis was carried out on the summer and fall seasons for all the region similar trend regime was for months (August to November) exhibits downward trend the western and Eastern in Persian Gulf coastal and upward trend for the northern regions. In general, the performance and capability non- parametric tests and parametric tests were consistence at the verified confidence limit.