Abstract:

The borders of the study area are the Sakarya river in the west; the Doğançay brook in the north and in the east; and the Karaçay brook passing through the district center of Geyve in the south. The main purpose of this study is to determine the climatic characteristics of the area and to reveal the relationship between climate and vegetation cover. According to the climatic parameters, Sakarya province reflects the characteristics of the Black Sea climate while Geyve district has the characteristics of the Mediterranean climate. That manifests itself in the vegetation cover, too. In the study area, while humid forest cover that reflects the Black Sea climate type prevails in the areas where precipitation and topography are appropriate, dry forests composed of the species that reflect the Mediterranean climate type prevail in the areas where precipitation and slope are little. The soil characteristics are consistent with the vegetation cover in the area. The dominant tree species is

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