Determining the Relative Contribution of Sub-basins to Sediment Production by Magnetic Susceptibility Data

• Main Authors: K. SeydiNaureh, S. Ayoubi, K. Nosrati
• Format: Article
• Language: fas
• Published: Isfahan University of Technology 2019-12-01
• Series: علوم آب و خاک
• Subjects: sediment fingerprinting; magnetic susceptibility; chehelgazi catchment; bayesian uncertainty model
• Online Access: http://jstnar.iut.ac.ir/article-1-3553-en.html
• ISSN: 2476-3594; 2476-5554

The purpose of this study was to determine the relative contribution of sub-basin resources to sediment production by using magnetic susceptibility data as the tracer in Chehelgazi catchment, Sanandaj. For this purpose, 20 samples of the output 5 sub-basins were measured by harvesting and magnetic susceptibility. Kruskal-Wallis test results showed that in all three trackings, frequency high, low and dependent, at least two sources had the ability to differentiate. In the second step, the three tracers were tested on the discriminant analysis by the sub-basin source and two tracers with different power splitters showed the high frequency of 88% and the frequency dependence of 12%; power splitters both tracers together in the sub-basin splitters was 90%, so they were selected as the optimal combination; therefore, they have the capability to determine the relative contribution model of sediment. The results of Bayesian uncertainty model also indicated Todarsamadi sub-basin with 44.4% of the largest contribution and Doveyseh, Chatan and Cherendo sub-basins with 35.5, 7.9 and 4.5, respectively, and Madian Dol sub-basin with 4/4 percent had the lowest contribution to sediment production. Based on the available results, Todarsamadi and Doveyseh sub-basins had the highest amount of sediment production; so these results could be used in soil conservation and management planning.