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首页> 外文期刊>Journal of Science and Technology of Agriculture and Natural Resources >Numerical Modeling of Suspended Sediment Transport in Rivers (Case Study: Karkheh River)
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Numerical Modeling of Suspended Sediment Transport in Rivers (Case Study: Karkheh River)

机译:河流中悬浮泥沙运移的数值模拟(案例研究:卡尔赫河)

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Rivers as a main sources of supplying water for urban areas, agriculture and industry, are very important. This point reveals the necessity of the control, improvement and solving the problems of rivers, especially all problems relating to water quality. In this study, transport of the suspended sediment is numerically modeled. The Saint-Venant hydrodynamic equations and also advection-dispersion equation (ADE) are applied for modelling flow and suspended sediment transport. It is necessary to choose appropriate empirical and/or semi-empirical equation to accurately estimate the equilibrium suspended sediment discharge, as well as the appropriate equation describing longitudinal dispersion coefficient. In this research, 5 and 6 equations were applied in the ADE for estimating equilibrium suspended sediment discharge and longitudinal dispersion coefficient, respectively. 30 combinations of these equations were made and the final model was run for each of them separately. Comparison of the predicted suspended sediment concentrations and the corresponding measured values at the survey site, Abdelkhan Station, for the calibration and verification periods showed that the combination of the Van Rijn's equilibrium suspended sediment equation and the Fischer's longitudinal dispersion equation performed very well. The maximum percentages of errors in estimation of suspended sediment concentrations were 19.56% and 26.3% for the calibration and verification periods, respectively. Keywords: Suspended sediment, Karkheh River, ADE Equation, FASTER model, Longitudinal dispersion coefficient. Full-Text Type of Study: Research | Subject: Ggeneral Received: 2012/12/26 Related Websites Scientific Publications Commission - Health Ministry Scientific Publications Commission - Science Ministry Yektaweb Company Site Keywords ?????, Academic Journal, Scientific Article, ???? ????? ??, ???? ????? ??, ???? ????? ??, ???? ????? ??, ???? ????? ??, ???? ????? ??, ???? ?? Vote ? 2015 All Rights Reserved | JWSS - Isfahan University of Technology
机译:河流作为城市,农业和工业用水的主要来源,非常重要。这表明控制,改善和解决河流问题,特别是与水质有关的所有问题的必要性。在这项研究中,对悬浮泥沙的输运进行了数值模拟。使用Saint-Venant流体力学方程式以及对流扩散方程(ADE)来模拟水流和悬浮泥沙运移。必须选择适当的经验和/或半经验方程式,以准确估算平衡的悬浮泥沙流量,以及选择适当的方程式来描述纵向弥散系数。在这项研究中,在ADE中分别使用了5个和6个方程来估算平衡悬浮泥沙流量和纵向弥散系数。制作了这些方程式的30个组合,并分别为每个方程式运行最终模型。在标定和验证期间,通过对测量站点阿布德尔汗站的预计悬浮泥沙浓度和相应测量值的比较,可以看出,范里恩的平衡悬浮泥沙方程和菲舍尔纵向弥散方程的组合效果非常好。在校准和验证期间,悬浮悬浮物浓度估算中的最大误差百分比分别为19.56%和26.3%。关键词:悬浮泥沙,卡尔赫河,ADE方程,FASTER模型,纵向弥散系数。全文研究类型:研究|主题:一般收稿时间:2012/12/26相关网站科学出版物委员会-卫生部科学出版物委员会-科学部Yektaweb公司网站关键字??????,Academic Journal,Scientific Article,???? ?????? ??,???? ?????? ??,???? ?????? ??,???? ?????? ??,???? ?????? ??,???? ?????? ??,???? ??投票吗? 2015版权所有| JWSS-伊斯法罕工业大学

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