王宝银, 李杰. 维纳滤波在地下水数据处理中的应用[J]. 华北地震科学, 1989, 7(1): 26-33.
引用本文: 王宝银, 李杰. 维纳滤波在地下水数据处理中的应用[J]. 华北地震科学, 1989, 7(1): 26-33.
Wang Baoyin, Li Jie. APPLICATION OF WENNER FILTER TO UNDERGROUND WATER DATA PROCESSING[J]. North China Earthquake Sciences, 1989, 7(1): 26-33.
Citation: Wang Baoyin, Li Jie. APPLICATION OF WENNER FILTER TO UNDERGROUND WATER DATA PROCESSING[J]. North China Earthquake Sciences, 1989, 7(1): 26-33.

维纳滤波在地下水数据处理中的应用

APPLICATION OF WENNER FILTER TO UNDERGROUND WATER DATA PROCESSING

  • 摘要: 本文对山东兖州、莒南深井水位各取1个月左右的资料,将水位不当作输入道进行维纳滤波,用以排除气压、固体潮等干扰因素,提取震前水位升降弱异常信息。计算结果表明,此方法能够提高信噪比,以大于二倍标准离差为异常指标,对大于2厘米的异常点的分辨率达61%和96%,对大于3厘米的异常点的分辨率达86%和100%。残差曲线的随机性也显著改善。此法与把水位作为输入道的维纳滤波方法比较,异常分辨率由原来4-9%的几乎不能分辨提高到61-100%。将其与逐步回归分析方法比较,明显地改善了残差曲线的随机性,对于象莒南井这样固体潮差大、日波半日波固体潮系数差异大的井孔尤其适用;异常分辨率也有较大提高。本文还对莒南井日波半日波固体潮系数差异较大的原因结合滤波算子作了一定的讨论。

     

    Abstract: In this paper, for about one monthly water level data taken respectively from Yah Zhou and Junan deep wells, the water level is not used as input channel into wenner filter so that the disturbing facters suchas air pressure and solid tide can be removed and the weak anomalous information on water level rising and drop before an earthquake can be extracted.The calculation results show that this method can rais signal-to-noise ratio. Taking the signal-to-noise ratio which is two times larger than standard deviation as an anomalous criterion, the resolution for an anomalous point of 2 cm or more is up to 61% and 96%, for an anomalous point of 3 cm or more is to 86% and100%.The random property of the residual curve is also obviously decreased. Compared with the method in which water level is used as input channel into Wenner filter, this method raised the anomlous resolution from original 4-9% to 61-100%. Compared with gradual regression analysis method, it remarkably improved the radom property of residiual curves. It is especially suitabte to Junan well in which solid tide difference is large and solid tide coefficient difference of diurnal wave and semi-diurnal wave is large; the anomalous resolution is also relatively raised. This paper also, in terms of filter operator, discusses the reason why the solid tide coefficient difference letwen diurnal wave and semidiurnl wave in Junan well is comparably large.

     

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