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Mineralogy Investigation of Sediments of Riverbed in Shafarood Watershed, Gilan Province for Determining the Rate of Erosion and Sedimentation

    Authors

    • Mohammad Rostamtabar 1
    • Sadat Feiznia 2
    • ziaodin Shoaii 3

    1 M.s. Student of Sedimentology, Islamic Azad University, Science and Researches Branch, Tehran, I.R.IAN

    2 Professor, Reclamation of Arid and Mountainous Areas, Faculty of Natural Resources, University of Tehran, I.R.IRAN

    3 Associate Professor, Soil Conservation and Watershed Research Center, I.R.IRAN

,

Document Type : Research Paper

10.22059/jrwm.2016.61735
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Abstract

More accurate understanding of rock formations and sedimentary units sensitive to erosion will
enable us to present appropriate and timely methods in order to prevent accelerated erosion. In this
study, through predefined sampling from main and minor channels and granulometric analysis
using index sieves, mineralogical investigation has been performed qualitatively and quantitatively
by binoculars in laboratory. After that, sedimentation potential has been calculated by using
practical formulas. Then, sedimentation potential of each sedimentary unit has been estimated from
average results of sedimentary sample and with this method, sedimentation potential of Shafarood
Watershed has been obtained from average results of five sub basins. An equation has been
calculated for each sub basin and by this, an equation for whole watershed was presented. In this
equation, the Y which refers to the amount of delivered sediments has been placed in one side and
rock unit coefficients on the other side. The coefficient of each rock unit has a rule in sediment
production. These coefficients are dimensionless and demonstrate rock unit sensitivity to erosion.
The bigger this value, the more sensitive that rock unit is to erosion. In this way, the map of
sensitivity to erosion for each sub basin has been prepared by using (ARC GIS) software.
According to average sedimentation potential of Shafarood Watershed, marl units (Pgf), silty sandy
shale (Jsh) and sandy limestone (Kusl), have respectively the highest sensitivity and limestone units
(P), andesite - basalt (Pev) and tuffy shale (V) have the least sensitivity to the erosion.

Keywords

  • Sediment mineralogy
  • Predefined sampling
  • Index sieves
  • Binoculars
  • Rock units
  • Sedimentation potential
  • Sensitivity to erosion
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Journal of Range and Watershed Managment
Volume 69, Issue 1
June 2016
Pages 79-92
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  • PDF 1.08 M
History
  • Receive Date: 16 February 2013
  • Revise Date: 29 May 2017
  • Accept Date: 29 May 2017
  • First Publish Date: 29 May 2017
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Statistics
  • Article View: 471
  • PDF Download: 240

APA

Rostamtabar, M., Feiznia, S., & Shoaii, Z. (2016). Mineralogy Investigation of Sediments of Riverbed in Shafarood Watershed, Gilan Province for Determining the Rate of Erosion and Sedimentation. Journal of Range and Watershed Managment, 69(1), 79-92. doi: 10.22059/jrwm.2016.61735

MLA

Mohammad Rostamtabar; Sadat Feiznia; ziaodin Shoaii. "Mineralogy Investigation of Sediments of Riverbed in Shafarood Watershed, Gilan Province for Determining the Rate of Erosion and Sedimentation". Journal of Range and Watershed Managment, 69, 1, 2016, 79-92. doi: 10.22059/jrwm.2016.61735

HARVARD

Rostamtabar, M., Feiznia, S., Shoaii, Z. (2016). 'Mineralogy Investigation of Sediments of Riverbed in Shafarood Watershed, Gilan Province for Determining the Rate of Erosion and Sedimentation', Journal of Range and Watershed Managment, 69(1), pp. 79-92. doi: 10.22059/jrwm.2016.61735

VANCOUVER

Rostamtabar, M., Feiznia, S., Shoaii, Z. Mineralogy Investigation of Sediments of Riverbed in Shafarood Watershed, Gilan Province for Determining the Rate of Erosion and Sedimentation. Journal of Range and Watershed Managment, 2016; 69(1): 79-92. doi: 10.22059/jrwm.2016.61735

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