Investigating the effect of Marl's physical and chemical properties on the amount and forms of erosion (Case study: Aoun Ibn Ali – Tabriz' s Sorkhab)

Document Type : Research Paper

Authors

1 PHD, Department of Forest, Range and Watershed Management, Faculty of Natural Resources and Environment, Science and Research Branch, Islamic Azad university, Tehran, Iran.

2 Professor, Department of Forest, Range and Watershed Management, Faculty of Natural Resources and Environment, Science and Research Branch, Islamic Azad university, Tehran, Iran

3 Assistant Professor, Department of Forest, Range and Watershed Management, Faculty of Natural Resources and Environment, Science and Research Branch, Islamic Azad university, Tehran, Iran.

4 Professor Department of Forest, Range and Watershed Management, Faculty of Natural Resources and Environment, Science and Research Branch, Islamic Azad university, Tehran, Iran

Abstract

Due to physical and chemical composition and lack of vegetation cover and therefore less organic matter, Marlons formations are the most sensitive formations to erosion, so that by removing the particles of the soil and transporting their to the lower regions, cause different forms of erosions. Due to the physical and chemical properties of marls, the study area has caused various types of erosion in the basin and downstream urban areas has been affected followed by mudflows resulting from their erosion and sedimentation. In this research, 35 soil samples were taken from the different work units to determine the physical and chemical characteristics and also to study the soil losses using a rain simulator. Along to this, 5 samples from particular marl units of the area was taken and transferred to the laboratory for mineralogical experiments. The K method in the global erosion equation was used to evaluate the degradability of detached materials that according to this method, the highest value of k is related to forms with a coefficient of 70%, and the least of which is the surface and rainfall erosion form with a coefficient of 25%. Also, due to the fact that there were 4 units of work with attached materials, the stripy method was used to evaluate their erodibility.

Keywords


Volume 73, Issue 3
December 2020
Pages 473-487
  • Receive Date: 18 September 2018
  • Revise Date: 17 September 2019
  • Accept Date: 01 September 2019
  • First Publish Date: 21 November 2020