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首页> 外文期刊>Arabian journal of geosciences >Performance evaluation of correction coefficients to optimize sediment rating curves on the basis of the Karkheh dam reservoir hydrography, west Iran
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Performance evaluation of correction coefficients to optimize sediment rating curves on the basis of the Karkheh dam reservoir hydrography, west Iran

机译：校正系数的绩效评估优化沉积物评级曲线基于Karkheh坝水库水文，西伊朗

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摘要

The prediction of useful lifetime of a dam is estimated through accurate estimate of river sediments which mostly depend on sediment rating curve. Over the past decades, various methods have been developed by investigators. With respect to the importance of this issue, in the present study, the best discharge-sediment relationship for Jelogir hydrometric station located at the upstream of Karkheh reservoir dam is presented. In the first step, sediment rating curves in annual, seasonal, monthly, wet and dry, and middle of the classes linear ways and applying 3 correction coefficients that include Smearing, FAO, and QMILE were obtained; then, their performance was evaluated. Comparison of these results with data obtained from hydrographical operation of Karkheh dam reservoir showed that the optimal equation of discharge-sediment at this hydrometric station follows annual linear sediment rating curve with QMILE correction coefficient. According to the results, annual method has estimated sediment volume less than the actual volume, about 98.7% of the actual sediment, while other evaluated methods have showed sediment volume more than the actual one, and among correction coefficients, the application of QMILE correction coefficient is more reasonable than other coefficients.
机译：通过大多依赖于沉积物曲线的河沉积物的准确估计，估计了大坝的有用寿命的预测。在过去的几十年中，调查人员已经开发了各种方法。关于本问题的重要性，在本研究中，提出了位于Karkheh储层水坝上游的Jelogir湿法站的最佳排放沉积物关系。在第一步中，沉积物评级曲线年，季节性，每月，湿干，以及中间的线性方式和应用包括涂抹，粮农组织和Qmile的3个校正系数;然后，他们的表现得到评估。这些结果的比较通过karkheh坝储存器的水文操作获得的数据显示，该液中排出沉积物的最佳方程随着Qmile校正系数的每年线性沉积物额定曲线。根据结果​​，年度方法估计沉积物量小于实际体积，约98.7％的实际沉积物，而其他评估方法表现出沉积物体积超过实际的体积，以及校正系数的校正系数，QMILE校正系数的应用。比其他系数更合理。

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