Affecting parameters in alternating the level of Urmia lake

Study of effective parameters on fluctuations of water-level in lake urmia is very important and sensitive issue.sicce it΄s not only a natural heritage for the region and country important for researcher΄s in different fields like:biologists and geologist.main goal of this researchs to study world.to achieve this aim(goal) in this research , the following procedures were accomplished:Stage1):first,we got long-term rain pattern,tempraturs and water level of lake urmia during years 1370 to1388 from meteorological offices in the region.then,we worked on given statistics and also missing data. Stage2):in this stage, we used Excel,Spss software and also peerson΄s formula: