Analysis on the water level anomaly at Delingha Gahai well in Qinghai Province
-
摘要: 针对2018年青海德令哈台尕海井水位破年变异常，系统梳理和分析该井相关资料，发现该井两套水位仪运行稳定、数据一致性非常好，而这段时期异常与降雨和气压不相关，以及井孔附近地区的视应力值较高，表明该地区地壳应力水平进一步增强。利用水位变幅、去趋势和一阶差分分析，结果显示，该项异常信度较高，反映该区域构造活动信息，是周边两次中等强度地震的共同前兆，属于中短期异常。Abstract: For understanding the abnormal water level of Delingha Gahai well in Qinghai Province in 2018, the relevant information about the well is reviewed. The two water level instruments of the well are stable and consistent in operation. The anomalies in this period are not related to rainfall and air pressure, and the apparent stress value in vicinity of the well hole is high, which indicates that the crustal stress level in this area is further enhanced. The correlation analysis on amplitude variance of water level and first-order difference shows that the abnormal reliability is high, which reflects the regional tectonic activity information. This is a common precursor of two moderate earthquakes in its surrounding area, and belong to short-term and medium-term anomalies.
-
图 2 德令哈尕海井水位2016年1月—2019年6月整点值数据曲线
Figure 2. Hourly water level curve of Gahai well in Delingha from January 2016 to June 2019
图 3 德令哈尕海井水位曲线对比分析
Figure 3. Comparative analysis of well water level curve of Gahai well in Delingha
图 4 德令哈尕海井水位数据差值分析
Figure 4. Difference analysis of well water level curve of Gahai well in Delingha
图 6 德令哈尕海井水位与一般多项式分段曲线拟合之差曲线
Figure 6. Curve of difference between the water level of Gahai well in Delingha and the general polynomial curve fitting
图 7 德令哈尕海井水位数据一阶差分曲线
Figure 7. First order difference curve of well water level data of Gahai well in Delingha
图 8 柴达木中东部（94°—98°E，36°—38°N）视应力时序曲线
Figure 8. Time series curve of apparent stress in the Middle East of Qaidam (94°—98°E，36°—38°N)
表 1 2018年尕海井数字水位仪观测数据完整率对比
Table 1. The comparison of integrity rate of water observation data of Gahai well in 2018
时间 SWY-II水位仪
完整率/%LN-3A水位仪
完整率/%6月 100 99.993 1 7月 100 99.991 0 8月 100 99.993 3 9月 100 99.976 9 平均 100 99.988 6 从2018年6月开始计算 
下载: 导出CSV
-
[1] 陈亚红,李铂,张军,等. 豫01井水位异常与地震的关系分析[J]. 地震地磁观测与研究,2012,33(3):120-124 doi: 10.3969/j.issn.1003-3246.2012.03/04.023 [2] 车用太, 鱼金子. 地震地下流体学[M]. 北京: 气象出版社, 2006 [3] 陆明勇,李志雄,刘天海,等. 强地震前地下流体趋势异常的再探讨[J]. 国际地震动态,2013(10):21-23 doi: 10.3969/j.issn.0235-4975.2013.02.007 [4] 武晓东,王志惠,朱石军,等. 延庆五里营动水位异常变化分析[J]. 地震地磁观测与研究,2012,33(5):165-168 doi: 10.3969/j.issn.1003-3246.2012.05/06.030 [5] 付虹,陈立德,罗平,等. 1995年7月12日云南孟连中缅边界7.3级地震中短临预报及前兆异常特征[J]. 地震研究,1997,20(4):345-356 [6] 陈立德,付虹. 汶川8.0级地震前兆异常对比研究[J]. 内陆地震,2010,24(4):289-297 doi: 10.3969/j.issn.1001-8956.2010.04.001 [7] 中国地震局监测预报司. 地下流体数字观测技术[M]. 北京: 地震出版社, 2002 [8] 王俊,张军,陶月潮,等. 芜湖皖28井水位异常综合分析[J]. 地震地磁观测与研究,2014,35(5):172-178 [9] 罗娜,张子广,丁志华,等. 2016年衡水冀16井水位变化分析[J]. 地震地磁观测与研究,2018,39(2):147-153 doi: 10.3969/j.issn.1003-3246.2018.02.021 [10] 青海省地震局. 青海省地震监测志[M]. 北京: 地震出版社, 2005 [11] 文勇,邱鹏程,张敏,等. 德令哈台尕海井气氡仪脱气装置改造实验[J]. 地震研究,2014,37(S1):133-137 [12] 胡玉良,程冬焱,李慧玲,等. 静乐井SWY-II和LN-3A水位仪的对比分析[J]. 中国地震,2016,32(1):93-102 doi: 10.3969/j.issn.1001-4683.2016.01.009 [13] 范雪芳,刘耀炜,吴桂娥,等. 华北地区水位与水氡中期、中短期前兆异常特征研究[J]. 地震研究,2010,33(2):147-158,238 doi: 10.3969/j.issn.1000-0666.2010.02.005 [14] 张国民, 傅征祥, 桂燮泰, 等. 地震预报引论[M]. 北京: 科学出版社, 2001 -
点击查看大图
计量
- 文章访问数: 341
- HTML全文浏览量: 149
- PDF下载量: 15
- 被引次数: 0
