The impact of Shahriar sands mines on dust in Tehran province

Excavation in the river beds, rinsing sand and its transporting had the potential to cause physical destruction and spread in the surrounding aquatic and arid environments and mining of sand has caused environmental problems, including spreading dust. Tehran province is located on the southern slopes of Alborz. Also its alluvial sediments has extended from Alborz mountains to southern of Tehran province and create a suitable place for sand mines. Shahryar down town, like other parts of Iran, has many mines including silica, salt, sand and soil. Natural status and history of existence surface flows of north lands of the region, cause the accumulation of all kinds of sand mixtures in the form of alluvial sediments. In the northern part of the Shahriar alluvial lands are created by the Karaj river flood flows and now several companies are involved in sand exploitation of this region due to creating of Karaj Dam and the water cutting off from the mentioned lands. Shahryar down town like other parts of Iran has many mines including silica, salt, sand and soil. Currently, the number of sand mines is approximately 5 units. In general, the dust that penetrates into Tehran province is from the northwest direction in the direction of the Shahriar wind. This research has investigated the impact of Shahriar mines on dust intensification in Tehran province. Dust dispersion in Iran except foreign focuses have also internal origin, including dry lagoons, wasteland, sand mines and construction debris that is discharged around towns and villages without supervision. The results of the Shahriar wind showed that the dominant and semi dominant of the Shahriar wind is northwest in all seasons.