| THE EFFECTS OF INACCURATE INPUT PARAMETERS ON DEPOSITION OF SUSPENDED SEDIMENT |
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| 作者姓名： | Markus MAURER Research Associate Institute of Hydrosciences University of the Federal Armed Forces Munich Werner-Heisenberg-Weg D- Neubiberg/Munich Germany Youcef KELANEMER Research Associate Institute of Hydrosciences University of the F |
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| 作者单位： | Markus MAURER，Research Associate，Institute of Hydrosciences，University of the Federal Armed Forces Munich，Werner-Heisenberg-Weg 39，D-85577 Neubiberg/Munich，Germany Youcef KELANEMER，Research Associate，Institute of Hydrosciences，University of the F |
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| 摘 要： | I.~OntjcnONEngineeringPredictionsofsedimenttransPOrtinopen-Channelsystems,especiallyifunsteadyflowconditionmustbeconsidered,isfraughtwithambigUityduetospatialandtemporalvariability,measurementerrors,lumtedsamplingoftheParameters,bounceandscallconditionS,andsink/sourcetenns.Duringrecentyearsmanysophisticatedmathematicalmodelshavebecomeavailabletocalculateunsteadyflowinone,tWoorthreedimensionS.ThesemodelswillbecoupledwithtranSportequationSforbedloadorsuSpendedloadtocalculateforexamplelongt…
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THE EFFECTS OF INACCURATE INPUT PARAMETERS ON DEPOSITION OF SUSPENDED SEDIMENT |
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| Markus MAURER,Research Associate,Institute of Hydrosciences,University of the Federal Armed Forces Munich,Werner-Heisenberg-Weg ,D- Neubiberg/Munich,Germany Youcef KELANEMER,Research Associate,Institute of Hydrosciences,University of the F.THE EFFECTS OF INACCURATE INPUT PARAMETERS ON DEPOSITION OF SUSPENDED SEDIMENT[J].International Journal of Sediment Research,1997(3). |
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| Authors: | Markus MAURER Research Associate |
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| Institution: | Markus MAURER,Research Associate,Institute of Hydrosciences,University of the Federal Armed Forces Munich,Werner-Heisenberg-Weg 39,D-85577 Neubiberg/Munich,Germany Youcef KELANEMER,Research Associate,Institute of Hydrosciences,University of the F |
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| Abstract: | Calculation of sediment transport processes is a very difficult task. Due to many influencing factors and the impossibibity to develop a fully valid physically model, there exist many approximate models to simulate the process of sediment transport. For engineering predictions in unsteady flow, there exist numerical schemes to solve the St. Venant equations in one or two dimensions coupled with an equation for sediment tranport. The problem is not only the accurate calibratinn of the model, but also the acquisition of realistic values for the various input parameters. For most of the parameters we have to consider their spatial and/or temporal stochastic nature, and therefore we must describe them as random variables or spatiotemporal random fields. The well known first order reliability method is a useful tool to assess the influence of stochastic input variables to the calculated result. In this paper we will show how uns method can be applied to judge quantitatively the influence of the inaccuracy of different input parameters with a simple model for deposition of suspended material in onedimensinnal unsteady flow. |
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| Keywords: | reliability theory stochastic differential equations uncertainty deposition |
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