气压、水位对榆树沟分量应变的影响特征及机制研究

CHARACTERISTICS AND MECHANISM RESEARCH ON INFLUENCE OF AIR PRESSURE AND WATER LEVEL ON COMPONENT STRAIN OF YUSHUGOU

应用相关性分析和小波分析方法,研究气压、水位与榆树沟分量应变之间的关系及影响机制,结果表明:(1)水位是榆树沟分量应变长周期变化的主要影响因素,尤其对分量应变EW、NE向影响较显著,表现为中高度线性负相关;2016—2018年EW向相位滞后水位约1 d,NE向相位滞后水位约8 d;2019—2021年EW向相位滞后水位约4 d,NE向相位滞后水位约7 d;(2)气压是分量应变短周期变化的主要影响因素,EW、NW向对其响应更为灵敏,表现为中高度线性负相关;EW向与气压不存在相位滞后,NW向相位滞后气压约55 min;(3)小波分析结果显示,气压对EW分量影响的显著频段为26~28 min、210~215 min,对NW分量影响的显著频段为26~28 min、211~214 min。

By applying correlation analysis and wavelet analysis methods,the relationship and influencing mechanism between air pressure,water level,and Yushugou component strain were studied.The results showed that:(1)water level is the main influencing factor for the long-term variation of Yushugou component strain,especially for the EW and NE directions of component strain,which have a significant impact,showing a medium to high linear negative correlation;From 2016 to 2018,the phase lag water level in the EW direction was about 1 d,and the phase lag water level in the NW direction was about 8 d;From 2019 to 2021,the phase lag water level in the EW direction is about 4 days,and the phase lag water level in the NW direction is about 7 days;(2)Air pressure is the main influencing factor for the short-term variation of component strain,and the EW and NW directions are more sensitive to its response,exhibiting a medium to high linear negative correlation;There is no phase lag between the EW direction and the air pressure,while the NW direction has a phase lag of about 55 minutes for the air pressure;(3)The wavelet analysis results show that the significant frequency bands of the influence of air pressure on the EW component are 26~28 min and 210~215 min,and the significant frequency bands of the influence on the NW component are 26~28 min and 211~214 min.