中文摘要：

2005年3-10月，陕西省关中东部华县毕家乡东林场农业灌溉用井群体出现强烈的翻花、冒泡、响声现象，个别井水色浑浊。其历时之长，范围之广，在陕西省内近30年来少见。我们从中国地震局监测预报司编著的《地震前兆异常落实工作指南》的主导思想出发，对华县井水宏观异常现象进行了较为深入的现场取样调查、测量与分析，从化学成因的角度对这一宏观异常现象进行分析解释，所得结果得到了跨断层水准测量结果的佐证。认为该次井水的宏观气体异常作为当地地震短临前兆的依据不充分。最后给出了分析处理井水宏观气体异常现象的一些建议。

英文摘要：

From May to October agriculture-irrigated wells in East several wells appears turbid. It is extensive scope for the last thirty Anomaly Verification Work Guide of 2005, there appered strong roll, bubbles and sound in a group of Woodland, Bijia town, Huaxian county, Shaanxi Province, water of bizarre that such macro-anomaly lasted in a long period and in an years in Shaanxi Province. According to the Earthquake Precursory thinking edited by the Department of Monitoring and Prediction, CEA, we investigate the macroscopical phenomenon and sampling on-the-spot. After analysis of the sample, this paper focuses on macroscopical phenomenon by chemic genesis. The conclusion is validated by cross-fauh leveling. Considering macroscopic anomaly for gas regarded as short-term precusory is insufficient. Finally, it gives some advice about macroscopic anomaly for gas.