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ISSN 2096-7780 CN 10-1665/P

Na Zhang, Yanmin Gong, Yan Wang. Analysis of water tube tiltmeter observation affected by reservoir load [J]. Progress in Earthquake Sciences, 2023, (5): 228-233. doi: 10.19987/j.dzkxjz.2022-146" target="_blank" class="mainColor"> 10.19987/j.dzkxjz.2022-146.
Citation: Na Zhang, Yanmin Gong, Yan Wang. Analysis of water tube tiltmeter observation affected by reservoir load [J]. Progress in Earthquake Sciences, 2023, (5): 228-233. doi: 10.19987/j.dzkxjz.2022-146" target="_blank" class="mainColor"> 10.19987/j.dzkxjz.2022-146.

Analysis of water tube tiltmeter observation affected by reservoir load

  • The NE component curve of DSQ water tube tiltmeter at Yixian seismic station in Hebei Province had a downward trend since February 14, 2022. The annual change curve was different from that of previous years. Combined with the simulation results of three-dimensional concentrated load model, it is shown that the total reservoir capacity of Wanglong reservoir reached 279.50×104 m3 from February 14 to April 6, 2022. The theoretical value of tilt change was 1.27×10−7, which is higher than the limit index of tilt interference of 1.455×10−8. It was inferred as the main factor causing the abnormal change of NE component acceleration of water tube instrument at Yixian station.
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