裂隙-管道介质泉水流量衰减过程中的有色噪声辨识与消减

Colored noise identification and its decreasing of spring flow attenuation in fissure-conduit media

摘要

摘要: 文章在实验室模拟岩溶地下水系统泉流量衰减过程的基础上,针对建模过程中存在的有色噪声问题,提出利用Cochrane-Orcutt迭代法与自相关相容协方差识别和消减建模过程中有色噪声,确定裂隙-管道介质岩溶泉衰减流量具有三阶自相关特征,并成功建立裂隙-管道介质中岩溶泉流量的向量自回归(VAR)方程,提高了模型精度。
- 裂隙-管道介质 /
- 衰减过程 /
- 有色噪声 /
- Basic Hydrology System /
- Cochrane-Orcutt迭代法 /
- 自相关相容协方差
Abstract: Based on the laboratory simulation of the spring flow attenuation in fissure-conduit media of a groundwater system,the Cochrane-Orcutt iteration method combined with the Heteroskedasticity and Autocorrelation Consistent Covariances was used to identify and decrease the colored noises during the linear model developing process.The analysis of the Heteroskedasticity and Autocorrelation Consistent Covariances shows that the discharge of a spring in the fissure-conduit media has the characteristics of three order lag correlation.A vector autoregressive model for spring flow of the fissure-conduit media has been established and the model results have a relatively high simulation precision.
- fissure-conduit media /
- attenuation /
- colored noise /
- Basic Hydrology System /
- Cochrane-Orcutt iteration step /
- heteroskedasticity and autocorrelation consistent covariances