Author(s): Mohammad Sadegh Sadeghian; Faridah Othman; Mohammad Daneshkhah; Mohammad Heydari
Linked Author(s):
Keywords: Sediment Estimation; Sedimentation Prediction; Sediment Deposition; Area Increment Method
Abstract: Sedimentation in reservoirs has drawn the attention of researchers due to its important role in reducing dam useful life during past years. In fact, there have been many studies on different empirical and semi- empirical methods, capacity determination modeling, procedure of depositing sediments and calculating sediments in order to determine dead storage volume in dam reservoirs. Alongside of those studies, discussions such as gradual changes in specific gravity of sediments, trapping coefficient of sediments and the annual sedimentation rate have been noticed during the last decades as well. In this study we compared the outcomes of statistic results and finding depth data, during 40 to 45 years of operation period, which is done by echo sounder system, with the gained results during designing of Karaj dam and Latiyan dam. Furthermore, sedimentation rate and volume reduction percentage are evaluated in these two dams and the results were analyzed for determining sedimentation rate and also to study whether the total sediment volume during the reservoir useful life coincides calculations during designing. In the end, it showed that the increasing level method for the mentioned dams was not an appropriate and adequate method to distribute sediments.
Year: 2013