【摘要】 保定西部山前地区位于太行山及华北平原交界带,为缓解极端气候灾害对生产生活的影响,维持地下水资源的可持续开发利用,开展相关的地下水水化学及同位素特征研究。研究区地下水化学类型以HCO₃—Ca·Mg、HCO₃·SO₄—Ca·Mg及SO₄·HCO₃—Ca·Mg为主,区内地下水主要来源于大气降水,流域内地表水补给地下水;地下水中化学成分为Ca²⁺、Mg²⁺、HCO₃^-、SO₄^2-,主要来源于岩石风化作用,同时受到人类活动的影响,地下水中硝酸盐含量明显升高;由于受到褶皱构造的控制,流域的上游及平原区均出现年龄大于60年的地下水,多数岩溶水年龄较复杂,从现代水到大于60年的水均有分布。研究成果为流域内水资源的合理开发利用提供建议,区内岩溶地下水的开发将在一定程度上缓解极端天气的影响。更多还原

【Abstract】 The piedmont region of Western Baoding is situated on the borderland between the Taihang Mountains and the northern-China plain. In order to alleviate the impact of extreme weather disasters on production and living,and to maintain the sustainable development and utilization of groundwater resources,the studies of groundwater hydrochemistry and isotope characteristics were carried out. In the study area,the types of most groundwater are HCO₃—Ca·Mg,HCO₃·SO₄—Ca·Mg and SO₄·HCO₃—Ca·Mg,and the groundwater recharge mainly comes from precipitation and surface water in the river basin. The chemical components in the groundwater mainly are Ca^{2 +},Mg^{2 +},HCO₃^- and SO₄^2-,which come from the rock weathering. The nitrate concentration in the groundwater is obviously increased due to human activities influences; Because of the control of fold structures,the groundwater ages in the upper reaches and plain areas of the river basin are more than 60 years old. Most of the karst water ages are more complicated,and the groundwater ages ranged from modern to more than 60 years. The results of the study provide suggestions forthe rational exploitation and utilization of water resources in the basin. The development of karst groundwater in the area will alleviate the influence of extreme weather to a certain extent.更多还原