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ŠUMARSKI LIST 9-10/2017 str. 19     <-- 19 -->        PDF

The study area of this research, Gökdere catchment has a rich flora and is important in terms of water production and forest resources; therefore, it was necessary to research this region. There are different land use types and the human factor plays an effective role in the catchment. Moreover, the main reasons for choosing this catchment as the research area are the excessive destruction and annihilation of the natural resources within the catchment.
MATERIALS AND METHODS
MATERIJALI I METODE RADA
Study Area – Područje istraživanja
Gökdere catchment is located on the south backward of Ilgaz Mountain that forms the north Anatolian mountain range. It is located within the transition zone between the humid climate of the Black Sea and the semiarid climate of the Central Anatolia. The Gökdere catchment is located between 40º 59΄ – 41º 04΄N and 33º 42΄ – 33º 51΄E longitudes on the southern slopes of the Ilgaz mountain range. The altitudes of sampling area ranges between 1100 m and 2540 m (Fig. 1)
According to the Ilgaz Meteorology Station data (Anonymous, 2016) the climate of study area is subhumid and semiarid in Black Sea backward region. The mean annual temperature is 10.2 oC and precipitation is 436.6 mm (Anonymous, 2016). Topography and slope show great variations and hilly and rolling physiographic units are particularly common in the study area. The study area is characterized by crystallized limestone series in general (Ketin, 1962).
The average altitude and slope of the Gökdere catchment are 1714 m and 20 %, respectively (Fig. 1). Very steep and highly inclined terrains constitute approximately 70 % of the catchment. The catchment area is mostly covered by degraded forest (60 %) and productive forest (10 %). Dominant tree species of forest are Uludağ fir (Abies bornmulleriana Mattf), scotch pine (Pinus sylvetris L), and Anatolian black pine (Pinus nigra subsp. pallasiana, Arnold). Dry farming is done using traditional farming methods in 9 % of the catchment (Anonymous, 2015). In general, agriculture is done in marginal areas within the catchment. Agricultural areas are located in steep regions converted from forests and grasslands. In the catchment, grazing takes place in and under the forest (Table 1).
Some catchments characteristics were determined and evaluated by using ArcGIS 10 in this study (Fig. 2 a-b, 3).