重庆大足井水位对邻井抽水的奇异响应及其机理

doi:10.3969/j.issn.0253-4967.2012.02.014

地震地质 ›› 2012, Vol. ›› Issue (2): 359-364.DOI: 10.3969/j.issn.0253-4967.2012.02.014

重庆大足井水位对邻井抽水的奇异响应及其机理

陈敏¹, 唐小勇¹, 郭卫英¹, 贺曼秋¹, 巩浩波¹, 李光科², 陈雷², 杨林², 陈凯², 谭君³, 贾鸿飞⁴

1. 重庆市地震监测预报中心, 重庆 401147;
2. 重庆市地震台, 重庆 400056;
3. 重庆市万州区地震局, 重庆 404000;
4. 中国地震局地壳应力研究所, 北京 100085

收稿日期:2010-12-30 修回日期:2012-03-14 出版日期:2012-06-30 发布日期:2012-07-12
基金资助:
国家自然科学基金(41104051)资助

ABNORMAL RESPONSE OF CHONGQING DAZU WELL WATER LEVEL CAUSED BY NEARBY WELL PUMPING AND THE MECHANISM

CHEN Min¹, TANG Xiao-yong¹, GUO Wei-ying¹, HE Man-qiu¹, GONG Hao-bo¹, LI Guang-ke², CHEN Lei², YANG Lin², CHEN Kai², TAN Jun³, JIA Hong-fei⁴

1. Earthquake Monitoring and Prediction Center of Chongqing Municipality, Chongqing 401147, China;
2. Seismostation of Chongqing Municipality, Chongqing 400056, China;
3. Seismological Bureau of Wanzhou District of Chongqing Municipality, Chongqing 404000, China;
4. Institute of Crustal Dynamics, China Earthquake Administration, Beijing 100085, China

Received:2010-12-30 Revised:2012-03-14 Online:2012-06-30 Published:2012-07-12

摘要/Abstract

摘要： 大足井位于重庆市大足县拾万镇,井深108.7m,观测含水层为J_2S泥岩夹砂层的风化裂隙潜水层。多年的观测结果表明,每当相距仅14.6m的邻井抽水时,该井水位不仅不降,反而上升,是国内外罕见的奇异现象。通过对这一现象进行的观测资料分析、井区地质-水文地质条件调查、现场试验观测及理论分析等得出,大足井水位对邻井抽水的奇异响应是在特定的水文地质条件下,抽水降落漏斗外边界带上因水流速度较大引起的动水压力使该处的观测井产生的特殊井水位动态。

关键词: 井水位, 抽水干扰, 动水压力, 重庆大足井

Abstract: Dazu Well is located in Shiwan Town of Dazu County,Chongqing City,the well is 108.7m deep. The observed aquifer layer is weather-fractured phreatic aquifer,of which the rock stratum is mudstone of Middle Jurassic Shaximiao Formation(J_2S)interbedded by sand. Years of observations show that whenever the nearby well,which is 14.6m away,was pumped,the water level of Dazu well rose instead of drop. This kind of anomalous response has been rarely reported both at home and abroad. By analyzing the observation data,investigating the local geological and hydrogeological conditions,field observation and theoretic analysis,etc. ,we conclude that the anomalous response of Dazu well water level to the pumping of nearby well is attributed to the special water level regime of the observation well caused by hydrodynamic pressure due to the larger flow velocity in the outer boundary of pumping-depression cone,under a specific hydrogeological condition.

Key words: well water level, pumping interference, hydrodynamic pressure, Dazu Well

中图分类号:

P315.72⁺3

陈敏, 唐小勇, 郭卫英, 贺曼秋, 巩浩波, 李光科, 陈雷, 杨林, 陈凯, 谭君, 贾鸿飞. 重庆大足井水位对邻井抽水的奇异响应及其机理[J]. 地震地质, 2012, (2): 359-364.

CHEN Min, TANG Xiao-yong, GUO Wei-ying, HE Man-qiu, GONG Hao-bo, LI Guang-ke, CHEN Lei, YANG Lin, CHEN Kai, TAN Jun, JIA Hong-fei. ABNORMAL RESPONSE OF CHONGQING DAZU WELL WATER LEVEL CAUSED BY NEARBY WELL PUMPING AND THE MECHANISM[J]. SEISMOLOGY AND GEOLOGY, 2012, (2): 359-364.

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重庆大足井水位对邻井抽水的奇异响应及其机理

ABNORMAL RESPONSE OF CHONGQING DAZU WELL WATER LEVEL CAUSED BY NEARBY WELL PUMPING AND THE MECHANISM

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