Investigation of the root system of riparian Tamarix tree,indirect flow of river in order to use in practical slopes stability.

Document Type : Research Paper


هیئت علمی


Root system is one of the factors affecting soil shear strength, increasing it, and thus bringing about slope stability. This study investigates the root system of Tamarix trees on slope of riverbanks and in the direction of their flow. A number of five trees (from TAMARIX species) grown on the river bank were selected each within a distance of about one km from SAIMEREH River in Ilam Province. Circle profile trenching method was employed to obtain and study the root characteristics. In the direct on of flow, the number and diameter of roots were recorded on up and downside region of the plants. Results show that the number of roots on the upside region is about 11.6 percent more than those on the downside region. For all diameters, the number of roots in up region is more than those on the downside region. The average root diameter on the upside region is higher than that on the downside region. Total root area on the upper region is about 23 percent more than that in down region. On up region, thick roots contain more of total root but on down region it is the inverse. It is observed that, in direct flow, root system of riparian trees on riverbank is asymmetrical.


Main Subjects

Abdi, E. (2009). An investigation of the effect of tree roots in slope stability in order to use in practical Forest Road Construction and Bioengineering. Ph.D dissertation, University of Tehran, Faculty of Natural Resources, Department of Forestry. (In Farsi)
Abernethy, B., and Rutherfurd, I.D., 2001, The distribution and strength of riparian tree roots in relation to riverbank reinforcement, Hydrological Processes, 15: 63–79
Bischetti, G.B., Chiaradia, E.A., Simonato,T., Speziali, B., Vitali, B., Vullo, P., and  Zocco, A., (2005), Root strength and root area ratio of forest species in Lombardy (Northern Italy), Plant and Soil, 278:11–22.
Bischeti, G, B., (2009), Root cohesion of forest species in the Italian ALPS, Plant soil, 324:71-89.
Chiatante, D. Scippa, G. S., Di Dorio, A., Sarnataro, M., (2003), The influence of steep slope on root system development, Journal of Plant Growth Regulation, 21: 247–260.
Cofie, P. and Koolen, A. J., (2001), Test speed and other factors affecting the measurements of tree root properties used in soil reinforcement models, Soil and Tillage Research, 63: 51-56.
Davoudi, M.H.and Fatemi Aqda, M., (2008), Effect of Diameter and Density of Willow Roots on  Shear Resistance of Soils, Journal of Geosciences, Vol. 18, No. 71.(In Farsi)
De Baets, S., Poesen, J., Reubens, B., Wemans, K., De Baerdemaeker, J., and Muys, B., (2008), Root tensile strength and root distribution of typical Mediterranean plant species and their contribution to soil shear strength, Plant Soil, 305: 207–226.
Docker, B. B. and Hubble, T. C. T., (2008), Quantifying root-reinforcement of river bank soils by four Australian tree species, Geomorphology, 100: 401–418.
Di Iorio, A. Lasserre. B., Scippa, G. S., and Chiatante, D., (2005), Root System Architecture of Quercus pubescens Trees Growing on Different Sloping Conditions, Annals of Botany, 95: 351–361.
Hubble, T. C. T., Docker, B. B., and Rutherfurd, I. D., (2010), The role of riparian trees in maintaining riverbank stability: A review of Australian experience and practice, Ecological Engineering, 36: 292–304.
Hosseini, A.R., M. Shafai-Bajestan and Musavi, S.H. (2014). Investigation of Root System of Tamarix Trees on Slope of SAIMERH Riverbanks. Journal of Irrigation Sciences and Engineering, 36(4), 98 -100. (In Farsi)
Hosseini, A.R. (2013). Investigation of the effects of riparian tree roots on riverbanks stability (SAIMERH RIVER). Ph.D dissertation, University of Shahid Chamran University of Ahwaz, Water Science Faculty, Department of Hydraulic Structures Engineering. (In Farsi)
Iran water Resource management company, (2009). Systematic study of waterched karkheh river.
Julien, Pierre Y. (1955).River Mechanics, Colorado State University
Mattia, C., Bischetti, G. B., and Gentile, F., (2005), Biotechnical characteristics of root system of typical Mediterranean species, Plant and Soil, 278: 23-32.
Nicoll, B.C., and Ray, D., (1996), Adaptive growth of tree root systems in response to wind action and site conditions, Tree Physiology, 16: 891–898.
Shafai-Bejestan, M., Salimi-Golsheikhi, M., (2002). Investigation of the effects of Tamaricaceae  and Popoluse Roots on the Stability of Karoon Banks by Root Geometry, The Scientific Journal of Agricultre, 25(1), sep. 2002. In Farsi
Simon, A., and Collison, A. J. C., (2002), Quantifying the mechanical and hydrologic effects of riparian vegetation on stream bank stability, Earth Surf. Process. Landforms 27: 527–546.