palette
Assessment of morphological changes of Taleghan river in upstream of Taleghan dam

Abstract

River channels have been affected by climate changes and human interventions such as channelization, dam, gravel and sand mining and land use changes. Dam changes water and sediment transport in river systems. These changes are as one of the most important factors affecting upstream and downstream river morphology. The aim of this paper is to explain the effect of Taleghan dam (it was constructed from 2001-2006) on upstream of Taleghan River over the period 2000–2017. Taleghan River is very important river in the Central Alborz of Iran. For this reason, Taleghan River was divided 2 reaches as control reach and backwater reach. Channel morphology have been investigated using historical aerial photographs, remote sensing images and field observations. Also channel width, sinuosity index, and particle size distribution were calculated for two reaches pre and post-dam construction. Results showed that the channel width was increased in the post-dam period. Widening was dominated in the backwater and the control reaches but increasing in the channel width in the backwater reach is more than the control reach.  the channel width has been increased due to the impact of the dam and flood events. Also the results of grain size distributions showed that dam affects the grain size distribution and leads to an increase in the fine particle size. Finally, the channel adjustment (aggradation and widening) in upstream of Taleghan River may cause floodplain inundation and damage to agriculture and residential area in floodplain.   

Keywords
River morphology, Grain size; dam; Taleghan river

References

-Alibert, M., Assani, A.A., Gratton, D., Leroux, D., Laurencelle, M., 2011. Statistical analysis of the evolution of a semialluvial stream channel upstream from an inversion-type reservoir: The case of the Matawin River (Quebec, Canada). Geomorphology, 131(1-2), 28-34.

-Brice, J.C., 1964. Channel patterns and terraces of the Loup Rivers in Nebraska. US Government Printing Office.

-Brierley, G.J., Fryirs, K.A., 2013. Geomorphology and river management: applications of the river styles framework. John Wiley & Sons.

-Gordon, E., Meentemeyer, R.K., 2006. Effects of dam operation and land use on stream channel morphology and riparian vegetation. Geomorphology, 82(3-4), 412-429.

-Folk, R.L., Ward, W.C., 1957. Brazos River bar [Texas]; a study in the significance of grain size parameters. Journal of Sedimentary Research, 27(1), 3-26.

-Helsel, D.R., Hirsch, R.M., 2002. Statistical methods in water resources (Vol. 323). Reston, VA: US Geological Survey.

-Khaleghi, S., Surian, N., 2019. Channel Adjustments in Iranian Rivers: A Review. Water, 11(4), p. 672.

-Khaleghi, S., Surian, N., Roostaei, S., Khorshiddoust, A.M., 2015. Driving factors of short-term channel changes in a semi-arid area (Sahand Mountain, northwestern Iran). Environmental earth sciences, 74(9), 6625-6637.

-Kong, D., Latrubesse, E.M., Miao, C., Zhou, R., 2020. Morphological response of the Lower Yellow River to the operation of Xiaolangdi Dam, China. Geomorphology, 350, p.106931.

-Leopold, L.B., Bull, W.B., 1979. Base level, aggradation, and grade. Proceedings of the American Philosophical Society, 123(3), 168-202.

-Liro, M., 2014. Conceptual model for assessing the channel changes upstream from dam reservoir. Quaestiones Geographicae, 33(1), 61-74.

-Liro, M., 2015. Gravel-bed channel changes upstream of a reservoir: The case of the Dunajec River upstream of the Czorsztyn Reservoir, southern Poland. Geomorphology, 228, 694-702.

-Ma, Y., Huang, H.Q., Nanson, G.C., Li, Y., Yao, W., 2012. Channel adjustments in response to the operation of large dams: The upper reach of the lower Yellow River. Geomorphology, 147, 35-48.

-Maddock, T., 1966. Behavior of Channels Upstream from Reservoirs. International Association of Scientific Hydrology, Publication, 71, 812–823.

-O’Flynn, K., Phillips, D.H., Toland, M., 2013. Sediment changes upstream and downstream of the Altnahinch Dam in the River Bush in Northern Ireland: a preliminary study. Environmental earth sciences, 70(6), 2645-2657.

-Sanyal, J., 2017. Predicting possible effects of dams on downstream river bed changes of a Himalayan river with morphodynamic modelling. Quaternary International, 453, 48-62.

-Słowik, M., Dezső, J., Marciniak, A., Tóth, G., Kovács, J., 2018. Evolution of river planforms downstream of dams: Effect of dam construction or earlier human‐induced changes?. Earth Surface Processes and Landforms, 43(10), 2045-2063.

-Smith, N.D., Morozova, G.S., Pérez-Arlucea, M., Gibling, M.R., 2016. Dam-induced and natural channel changes in the Saskatchewan River below the EB Campbell Dam, Canada. Geomorphology, 269, 186-202.

-Takahashi, M., Nakamura, F., 2011. Impacts of dam-regulated flows on channel morphology and riparian vegetation: a longitudinal analysis of Satsunai River, Japan. Landscape and ecological engineering, 7(1), 65-77.

-Vázquez-Tarrío, D., Tal, M., Camenen, B., Piégay, H., 2019. Effects of continuous embankments and successive run-of-the-river dams on bedload transport capacities along the Rhône River, France. Science of The Total Environment, 658, 1375-1389.

-Xu, J., 1990. Complex response in adjustment of Weihe channel to the construction of the Sanmenxia Reservoir. Z. Geomorphol, 34, 233–245.


Refbacks
  • There are currently no refbacks.