Relationship Between Morphometric Stream Characteristics and Sediment Heavy Metal Pollution in a Mining-Influenced Watershed
Publish place: Journal of Hydrosciences and Environment، Vol: 4، Issue: 7
Publish Year: 1399
نوع سند: مقاله ژورنالی
زبان: English
View: 151
This Paper With 8 Page And PDF Format Ready To Download
- Certificate
- من نویسنده این مقاله هستم
استخراج به نرم افزارهای پژوهشی:
شناسه ملی سند علمی:
JR_JHE-4-7_005
تاریخ نمایه سازی: 20 تیر 1400
Abstract:
Streams located in watershed environments act as a principal component of transportation and reservoir of heavy metals evacuated by mining activities. This study evaluated the relationship between morphometric stream characteristics and variations in the rate of sediment heavy metal pollution in a mining-influenced watershed. The study area was a mining site located in the Anguran region, Zanjan province, Iran. Three rivers were selected that exhibited significant differences in terms of path length and slope. Approximately ۱۵۰۰ g sediment was collected from downstream positions of Kaka River (R۱), Allah Lochay River (R۲), and Shurab River (R۳). Total zinc (Zn), nickel (Ni), lead (Pb), and cadmium (Cd) concentrations and particle size distribution were measured. The pollution load index (PLI) and geo-Accumulation Index (Igeo) were then calculated. Based on the results, the sediment particle size distribution significantly decreased in response to an increase in the river length and slope (R۱>R۲>R۳). Stream path length and slope are factors determining the size of bed particles transported by a river. The streams with longer path lengths and steeper slopes could transport finer fractions toward depositional positions. Further, the pollution level of the Kaka River sediment was the highest compared with other rivers. The highest Igeo value for the measured heavy metals was also observed in the Kaka River sediment, followed by the sediments of Allah Luchay and Shurab rivers. The regression results illustrated that the heavy metal concentrations were significantly positively correlated with clay and silt contents. These findings unequivocally showed that watershed environments exhibit a high vulnerability to mining activities because the streams can facilitate the transportation of sediment polluted by heavy metals across the landscape. On the other hand, the streams with higher length and slope surrounding mining sites increase the pollution transfer rate and cause a higher level of sediment heavy metal pollution.
Keywords:
Authors
A Mohseni
Department of Soil Science, University of Tabriz, Tabriz, Iran
N Mohseni
Department of Geography, Ferdowsi University of Mashhad, Mashhad, Iran
S. R Hosseinzadeh
Department of Geography, Ferdowsi University of Mashhad, Mashhad, Iran
مراجع و منابع این Paper:
لیست زیر مراجع و منابع استفاده شده در این Paper را نمایش می دهد. این مراجع به صورت کاملا ماشینی و بر اساس هوش مصنوعی استخراج شده اند و لذا ممکن است دارای اشکالاتی باشند که به مرور زمان دقت استخراج این محتوا افزایش می یابد. مراجعی که مقالات مربوط به آنها در سیویلیکا نمایه شده و پیدا شده اند، به خود Paper لینک شده اند :