输油管道建设对鄂尔多斯盆地地下水影响预测

探讨输油管道建设对鄂尔多斯盆地地下水环境的影响，根据研究区地质及水文地质特征，结合石油管道事故所设定条件，按照风险最大化原则，采用“瞬时注入示踪剂——平面瞬时点源”模型进行预测分析，结果表明：污染物在地下水中运移的1460d内，最大迁移距离呈先增大后减小的趋势，最大距离为116．05m；中心点浓度则从433．13mg／L减少至〈0．3mg／L，低于《生活饮用水卫生标准（GB5749—2006）》中石油类限值（0．3mg／L）；泄漏中心点逐渐运移至下游49．64m处，对地下水敏感点不会产生明显影响。

A Study on the Influence of Oil Pipeline Construction on Groundwater in Ordos Basin

As fractures sometimes happen in pipeline construction, the paper makes a study of the influence of oil spill on groundwater environment in Ordos basin. Taking hydrological and geological charhcteristics of the studied area and pollution level in a hypothetical oil spill case, the paper analyzes the maximum influence of pollution by building a ＂instantaneous tracer injection on the plane＂ model. The result shows that during the 146 migration days, 1 ） maximum migration distance increases up to 116.05 m at fist and then decreases, 2 ） concentration of the central point decreases from 433.13 mg/L to less than O. 3 mg/L, which is lower than oil limitation for drinking water, 3） and the central point migrates slowly to the lower course. All these indicate that oil spill will not affect so much on sensitive points of groundwater.