Hydrochemical considerations for identifying water from basaltic aquifers: The Israeli experience

Hydrochemical considerations for identifying water from basaltic aquifers: The Israeli experience
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确定玄武岩含水层水的水化学考虑因素:以色列的经验

DOI:
10.1016/j.ejrh.2015.11.016
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发表时间:
2016
期刊:
Journal of Hydrology: Regional Studies
影响因子:
--
通讯作者:
Rosenthal
Rosenthal
中科院分区:
--
文献类型:
--
作者:
Möller;Rosenthal

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研究区域以色列下加利利和戈兰高地的Yizre 'el-Harod-我打赌她是山谷。研究重点:在研究区域的补给区,查明渗入广泛分布的碱性橄榄石玄武岩的纯地下水。该区域新的水文见解地下水的特征是当量比,如Na/Cl > 1; Na/HCO 3 −< 1; SO 42 −-分数< 0.1; HCO 3 −/(Ca + Mg + Na)≥ 0.7; HCO 3 −/(Ca + Mg)> 1; 1000 Br/Cl在1-2.5范围内; δ 34 S硫酸盐< 5‰(CDT)。碗状归一化REY分布模式指示玄武岩露头的补给。这些含水层的补给不仅来自火山暴露面的直接降水,而且来自下面封闭的石灰岩含水层的水。石灰岩含水层地下水的特征是Na/Cl < 1; HCO 3 −/(Ca + Mg)< 1; HCO 3 −/(Ca + Mg + Na)< 0.7; 1000 Br/Cl在1.6-10之间; δ 34 S硫酸盐在20 - 25‰之间(CDT)。这些参数的广泛传播的特点混合的地下水从石灰岩集水区和含水层在不同阶段的水化学演化。这些地下水的REY模式类似于石灰岩。如果没有δ 34 S硫酸盐和/或REY分布模式,则来自玄武岩含水层的未混合水显示在HCO 3 −/(Ca + Mg)> 1和HCO 3 −/(Ca + Mg + Na + K)> 0.7的区域。将这些参数应用于仅显示地下水主要成分的分析表明,在研究地区,玄武岩集水区未混合地下水的贡献主要限于戈兰高地。含水层间水流对地下水的混合作用是一种普遍现象。
Study regionYizre’el-Harod-Bet She’an valley, Lower Galilee and Golan Heights, Israel.Study focusIdentification of pure groundwater that infiltrated the widespread alkali olivine basalts in the replenishment areas of the study region.New hydrological insights for the regionThe groundwater is characterized by equivalent ratios such as Na/Cl > 1; Na/HCO3−< 1; SO42−-fraction < 0.1; HCO3−/(Ca + Mg + Na) ≥ 0.7; HCO3−/(Ca + Mg) > 1; 1000Br/Cl in the range of 1–2.5; δ34Ssulfate< 5‰ (CDT). Bowl-shaped-normalized REY distribution patterns are indicative for recharge over basaltic outcrops. These aquifers are recharged not only by direct precipitation on volcanic exposures but also by water from underlying confined limestone aquifers. Groundwater from the limestone aquifers is characterized by Na/Cl < 1; HCO3−/(Ca + Mg) < 1; HCO3−/(Ca + Mg + Na) < 0.7; 1000Br/Cl in the range of 1.6–10; δ34Ssulfaterange from 20 to 25‰ (CDT). The wide spread of these parameters characterizes mixing of groundwater from both limestone catchments and aquifers in different stages of hydochemical evolution. The REY patterns of these groundwaters resemble those of limestones. If δ34Ssulfateand/or REY distribution patterns are not available, the unmixed water from basaltic-rock aquifers show up in the field of HCO3−/(Ca + Mg) > 1 and HCO3−/(Ca + Mg + Na + K) > 0.7. Application of these parameters to analyses showing only the main constituents of groundwater reveals that in the study area the contribution of unmixed groundwater from basaltic catchments is largely restricted to the Golan Heights. Mixing of groundwater by interaquifer flow is a common phenomenon all over the area.
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