標題: Spectral analysis of temporal variability of nonlinear and nonstationary rainfall-runoff processes
作者: Chang, Ching-Min
Yeh, Hund-Der
Chuang, Mo-Hsiung
環境工程研究所
Institute of Environmental Engineering
關鍵字: Nonlinear rainfall-runoff processes;Functional series representation;Nonstationary random fields;Fourier-Stieltjes representation
公開日期: 1-Aug-2019
摘要: This study deals with the time-dependent nonlinear response of catchments to the variations in rainfall. Both the rainfall and runoff discharge fields are treated to be nonstationary in time. A functional series representation, a generalization of the linear convolution integral, is employed to quantify the nonlinear relation between the input and output. The Fourier-Stieltjes representation approach is used to evaluate the variance of runoff discharge in the spectral frequency domain. The analysis based on the spectral solution for the runoff discharge variance clearly demonstrates that larger values of rainfall characteristic time scale or catchment size parameter lead to larger variability of the runoff discharge, while a larger catchment scale parameter leads to smaller variability of the runoff discharge.
URI: http://dx.doi.org/10.1016/j.jhydrol.2019.05.086
http://hdl.handle.net/11536/153085
ISSN: 0022-1694
DOI: 10.1016/j.jhydrol.2019.05.086
期刊: JOURNAL OF HYDROLOGY
Volume: 575
起始頁: 1301
結束頁: 1307
Appears in Collections:Articles