標題: SENSITIVITY AND UNCERTAINTY ANALYSIS OF A SEDIMENT TRANSPORT MODEL - A GLOBAL APPROACH
作者: CHANG, CH
YANG, JC
TUNG, YK
土木工程學系
Department of Civil Engineering
關鍵字: SEDIMENT TRANSPORT MODEL;SENSITIVITY ANALYSIS;UNCERTAINTY ANALYSIS
公開日期: 1-Dec-1993
摘要: Computerized sediment transport models are frequently employed to quantitatively simulate the movement of sediment materials in rivers. In spite of the deterministic nature of the models, the outputs are subject to uncertainty due to the inherent variability of many input parameters in time and in space, along with the lack of complete understanding of the involved processes. The commonly used first-order method for sensitivity and uncertainty analyses is to approximate a model by linear expansion at a selected point. Conclusions from the first-order method could be of limited use if the model responses drastically vary at different points in parameter space. To obtain the global sensitivity and uncertainty features of a sediment transport model over a larger input parameter space, the Latin hypercubic sampling technique along with regression procedures were employed. For the purpose of illustrating the methodologies, the computer model HEC2-SR was selected in this study. Through an example application, the results about the parameters sensitivity and uncertainty of water surface, bed elevation and sediment discharge were discussed.
URI: http://dx.doi.org/10.1007/BF01581617
http://hdl.handle.net/11536/2748
ISSN: 0931-1955
DOI: 10.1007/BF01581617
期刊: STOCHASTIC HYDROLOGY AND HYDRAULICS
Volume: 7
Issue: 4
起始頁: 299
結束頁: 314
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