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Salehi Teleshi, R., Tashakori, A., Vaseli, N. (2012). Estimation of the suspended sediment load in rivers with different hydrological methods (case study: Siahrood river in Mazandaran). Journal of Water Science & Engineering, 2(5), 73-90.
R Salehi Teleshi; A Tashakori; N Vaseli. "Estimation of the suspended sediment load in rivers with different hydrological methods (case study: Siahrood river in Mazandaran)". Journal of Water Science & Engineering, 2, 5, 2012, 73-90.
Salehi Teleshi, R., Tashakori, A., Vaseli, N. (2012). 'Estimation of the suspended sediment load in rivers with different hydrological methods (case study: Siahrood river in Mazandaran)', Journal of Water Science & Engineering, 2(5), pp. 73-90.
Salehi Teleshi, R., Tashakori, A., Vaseli, N. Estimation of the suspended sediment load in rivers with different hydrological methods (case study: Siahrood river in Mazandaran). Journal of Water Science & Engineering, 2012; 2(5): 73-90.

Estimation of the suspended sediment load in rivers with different hydrological methods (case study: Siahrood river in Mazandaran)

Article 6, Volume 2, Issue 5, Summer 2012, Page 73-90  XML PDF (455 K)
Document Type: Original Article
Authors
R Salehi Teleshi 1; A Tashakori2; N Vaseli3
1Civil Engineering, Islamic Azad University, Fars Science and Research Branch;
2Ass. Prof. of Islamic Azad University of Ghaemshahr,Iran.
3Ass. Prof. of Islamic Azad University, Fars Science and Research Branch, Iran.
Abstract
In a watershed, sediment arises due to the erosion and some factors such as pastures destruction,
change users, no reasonable cultivation. That causes problems such as sedimentation in reservoirs and
reduces their useful volume, reducing water quality in agricultural consumption; reduce the efficiency
of hydraulic structures and some other environmental problems. Changes in sediment load in a river
are an important parameter in water management projects and are an indicator to show the status of
soil erosion and ecological conditions of the area. The estimations of the sediment load are used in a
wide range of issues such as designing reservoirs, sediment transport in rivers, determining the effects
of watershed management and environmental protection. This study is denoted to Siahrood river in
Mazandaran province which is the main source of the water supply for a large part of the farm fields
area. In this project, by studying the efficiency of sediment rating curves and selecting the most
appropriate curve, the amount of suspended sediment load of the river is estimated perfectly. For this
purpose, the daily discharge of flow and corresponding statistics flow discharge–suspended sediment
discharge, which are measured simultaneously in some days of year, during a statistical period of 13
years (from 1998-99 to 2010-11), from the only hydrometric station in the main route of the river, is
used. For the selection of appropriate curve, we use statistical indicators mean squares of error and
coefficient of determination was performed then, by drawing rating curves of linear, multilinear and
mediocrity categories for this river, the rating curve of mediocrity categories with coefficient of
determination 93% was chosen as the appropriate sediment rating curve. Eventually, the amount of
suspended loads is estimated by use from various methods discharge of flow. These methods contain
the rating curve of mediocrity categories combined with the average daily water flow, average
monthly water flow, flow duration curve and combination of monthly and daily average discharge
method. Finally, the results of each four methods is compared together, and rating curve of mediocrity
categories method and combining it with average daily water flow is selected as the most appropriate
method. Moreover, the amount of suspended sediment load at hydrometric station is estimated about
55855 tons per year by selected method.
Keywords
suspended load; sediment; Siahrood river; sediment rating curve
References

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