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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。
Based on the simulation of spring flow decay process in karst groundwater system in laboratory, aiming at the problem of colored noise existing in the modeling process, the paper proposes a method to identify and reduce the colored noise in the process of modeling by using the Cochrane-Orcutt iterative method and the autocorrelation-compatible covariance , The third-order autocorrelation characteristic of the fissure-pipe media karst spring attenuation flow is determined, and the vector autoregression (VAR) equation of karst spring flow in the fissure-pipeline medium is established successfully to improve the accuracy of the model.