Analysing individual recession events: sensitivity of parameter determination to the calculation procedure

作者：Chen, Bo^*; Krajewski, Witold

来源：Hydrological Sciences Journal, 2016, 61(16): 2887-2901.

DOI：10.1080/02626667.2016.1170940

• Recession analysis
• recession variability
• recession parameters
• model fitting

This study assesses the sensitivity to model fitting methods and segment selection of the estimated parameters A and B of the model dQ/dt=-AQ(B) for individual events. We investigated about 750 recession events observed at 25 US Geological Survey gauges in the Iowa and Cedar river basins in the United States, with drainage areas ranging from 7 to 17 000km(2). The parameters of these recession events were estimated using three commonly adopted methods and recession segments with different extraction criteria. The results showed that the variations of the parameter estimates for the same recession event were comparable to the variations of parameters between different events due to using different model fitting methods and recession segments. This raises cautions for comparative analysis of individual recessions. The result also implies that the nonlinear direct fitting method is the most robust among the three model fitting methods compared.

• 出版日期2016
• 单位北京师范大学