吉林大学学报(地球科学版) ›› 2021, Vol. 51 ›› Issue (6): 1801-1810.doi: 10.13278/j.cnki.jjuese.20200054
李超峰1,2
Li Chaofeng1,2
摘要: 为了定量研究与评价含水层之间地下水水力联系程度,首次提出了水力联系系数C(hydraulic connection coefficient)的概念。将水力联系系数C定义为观测孔目的含水层水位降深与该观测孔位置抽水含水层水位降深的比值。通过水力联系系数,可定量评价某含水层水平上同层之间和垂向上不同含水层之间的水力联系程度。依据鄂尔多斯盆地白垩系洛河组各含水层段的水力联系系数C值,将含水层之间水力联系分为5个等级。其中,0.000 0 ≤ C<0.062 5,0.062 5 ≤ C<0.125 0,0.125 0 ≤ C<0.250 0,0.250 0 ≤ C<0.500 0,C ≥ 0.500 0,分别代表水力联系等级为极弱、弱、中等、强、极强。以高家堡井田钻孔抽(放)水试验数据为例,采用水力联系系数和观测孔水位响应时间两个指标定量评价了区内巨厚层状非均质洛河组含水层内部水力联系。结果表明:洛河组中上段水平同层之间的水力联系系数分别为0.373 0、0.413 8,观测孔水位响应时间较短(约为5 min),水力联系强;洛河组下段水平同层之间水力联系系数分别为0.440 1、0.491 1,观测孔水位响应时间较短(为9~20 min),水力联系强;洛河组中上段与下段垂向水力联系系数分别为0.000 2、0.007 2、0.089 7,观测孔水位响应时间较长(大于60 min),水力联系极弱至弱。
中图分类号:
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