GROUNDWATER LEVEL VARIATIONS IN THE SEISMICALLY ACTIVE REGION OF WESTERN BOHEMIA IN THE YEARS 2005-2010
GROUNDWATER LEVEL VARIATIONS IN THE SEISMICALLY ACTIVE REGION OF WESTERN BOHEMIA IN THE YEARS 2005-2010
复制标题
2005-2010年西波希米亚地震活跃区地下水位变化
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
Milan Bro
中科院分区：
文献类型：
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作者：
J. Valenta;Milan Bro
波希米亚地块西部（捷克-德国边界的沃格特兰/西波希米亚地区）的特点是相对频繁的板内地震群和当前地球动力学活动的其他表现，如mofettes，矿泉和温泉。本文分析了2005 - 2010年该地区4口水文威尔斯井地下水位的变化规律。报告还提到了2000 - 2004年期间的监测情况，并将其用于比较。其中两口威尔斯井位于震中诺沃科斯特尔地区，其他威尔斯井则较远。时间间隔包括2008年的震群，当时所有的威尔斯都显示出水位明显下降。在震中距离近30公里处观察到这种影响，这超过了在以前的地震群中观察到的水文变化的距离。此外，似乎在地震活动增加之前，水位略有上升，这可能是某种偶然现象。另一方面，水文变化在November Kostel地区相对较小，这表明，这个震中区是没有水文联系的地震活动断层的深度。因此，应在Novelos Kostel附近更广泛的地区寻找更合适的水文监测地点。
The western part of the Bohemian Massif (Vogtland/West-Bohemia region at the Czech-German border) is characterized by relatively frequent intraplate earthquake swarms and by other manifestations of current geodynamic activity, such as mofettes, mineral and thermal springs. In this study we analyze variations of groundwater level in four hydrological wells in the region during the years 2005–2010. Monitoring during the previous time interval of 2000–2004 is also mentioned and used for comparison. Two of the wells are located in the epicentral region of Nový Kostel, and the other wells are more distant. The time interval includes the 2008 earthquake swarm when all the wells displayed a noticeable drop in the water level. This effect was observed up to epicentral distances of nearly 30 km, which exceeds the distances of hydrological changes observed during previous earthquake swarms. Moreover, it seems that a small rise in the water level preceded the intervals of increased seismic activity, which could represent a certain precursory phenomenon. On the other hand, the hydrological changes in the Nový Kostel area were relatively small, indicating that this epicentral area is not hydrologically linked with the seismically active fault at depth. Consequently, more suitable localities for hydrological monitoring should be sought in a broader vicinity of Nový Kostel.