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Knowing wind energy and its features can help programmers in using this clean, free and renewable energy. Iran is located in the west wind region, and the common wind direction is from north-west to south-west in Iran. But in some regions of Iran, due to special regional conditions as well as the synoptic factors of atmosphere, the wind direction is different from the common wind direction in Iran. The wind speed is also higher than the average speed of west winds. Based on the statistics from wind speed and direc...

Soil erosion is a process threatening natural resources such as water, soil, plant cover and climate both directly and indirectly and it is dangerous for human safety and his life. Erosion not only weakens soil, makes useless farms and a lot of damage, but also causes harm by sedimentation solid of materials in streams, sources, dams, ports and decreases the amount of their capacity. In this project, we are studying soil erosion in Mousa Abad basin in Tiran, Isfahan in SLEMSA model using GIS. In this research, the...

The special geographical situation of Isfahan and its location in a depression as well as gathering pollutants in the air has turned Isfahan to one of the most polluted cities in Iran. In winter, Isfahan has the most pollutants in the air. In summer and autumn, it has a high level of pollutants. But in spring, the city has healthy air. The synoptic study of the air indicates that there is a high pressure center in Isfahan which is the result of the strengthening and spread of Siberia high pressure center and the s...