نوع مقاله : پژوهشی
نویسندگان
1 استادیار مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی آذربایجان شرقی، بخش تحقیقات حفاظت خاک و آبخیزداری
2 استادیار پژوهشی، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان آذربایجان شرقی- تبریز، بخش تحقیقات حفاظت خاک و آبخیزداری، تبریز، ایران
3 استادیار پژوهشی، موسسه تحقیقات جنگل‌ها و مراتع کشور – تهران، گروه تحقیقات تپه‌های شنی، تهران، ایران
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Introduction and purpose: Introduction and purpose: dust is one of the environmental issues that affect air quality and pollution, human health, soil fertility, and many social and environmental aspects of society. Wind erosion and sand dune movement have adverse environmental consequences. Identifying factors affecting sand mobility and predicting their condition in the future is necessary to control the wind erosion process. The purpose of this study is to identify and monitor the sources of dust and quicksand in Jolfa and Shush Qom-Gildir areas.
Materials and methods: Data analysis was done by identifying the sources of fine dust production, measuring and monitoring the production of dust and wind deposits using the RDD index, as well as measuring the threshold speed and intensity of wind erosion using a wind tunnel device. In order to investigate the effect of climate change, especially wind and rain, on the activity of sands and to predict the possibility of movement of sand dunes and sand dunes and the dust caused by them, Lancaster's global method was used.
Results and discussion: The results of the Lancaster index showed that 10% of the statistical years were in an active state, which corresponded to the years 1996, 2000 and 2001. Whereas, the immobility of sand dunes (inactive) according to the Lancaster index has accounted for about 26% of the statistical years; 65% of the time in 2020, sand dunes were in an active or sand-moving state at the top of the dunes. The lands of Jolfa micropollution center are mainly formed by the type of gravelly and sloping fan-shaped debris, and the soils of Shush Qom-Gildir micropollution center are mainly a combination of mountains, hilly plains and flood plains. The results of wind tunnel tests on soil samples collected from the land surface of Jolfa region showed that the erosion threshold of the collected sample is 8 meters per second.
Conclusions and suggestions: Plowed agricultural lands, abandoned drylands, poor pastures, dry beds of rivers and seasonal waterways, etc., in the presence of adverse climatic factors and other environmental conditions, can potentially act as sources of fine dust production. However, the above-mentioned lands are scattered in East Azerbaijan province, and in certain cases and times, they are able to create fine dust in a considerable amount.
کلیدواژه‌ها [English]
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