Investigating the Role of Tree Species in Urban Green Space in Modulating Temperature and Relative Humidity of the Environment (Case Study: Abidar Forest Park in Sanandaj)

Increasing the temperature of the urban environment is one of the most important environmental problems in cities. The purpose of this research is to evaluate the importance of different tree types as a way to adjust temperature and then to propose cultivating temperature modifications in urban conditions. To do this, firstly, in each of the desired tree species (Sycamore, Siblings, Acacia, Sanguinea and Pine) and a flat-bed area with similar physiographic conditions as the control area, measurements of temperature and humidity in the four main directions and center of each brigade In two summer and winter seasons, digital thermometer and rheumatoid arthritis was performed in 5 replications. Independent t-test results for comparison of mean temperature parameters showed that there was a significant difference between the mean temperature parameters in vegetation and control areas. Since the vegetation areas are cooler in comparison with the control areas in the same conditions of the air and the physiographic conditions are cooler 4885.6 °C in the summer and 14.3% warmer than the perimeter environment in the winter. The results of Tukeychr('39')s test showed that the most species of the species studied in the summer season were 10.5, 11.6 and 12.25 degrees Celsius respectively, and the maximum reduction in temperature (instantaneous temperature, minimum and maximum temperature) The highest amount of temperature rise (temperature, minimum, and maximum temperature) in winter is 7.24, 4.25 and 7.271 °C, respectively, relative to the surrounding area. The total area of the studied masses was 28.8 hectares, which was 6.48 °C for the summer, and the air temperature increased by 14.3 °C in winter. Therefore, with an increase in each hectare of green space, the appropriate species are 2.61 °C in summer and 1.26 ° C in winter. The results showed that the type of vegetation could have a significant impact on urban climates.