阜平县太古界变质岩经历了多期变质深熔作用,以揉塑性片麻岩为主,地层致密柔韧,富水性差,找水难度较大.在地质调查、物探勘探及钻探验证相结合的基础上,较系统地分析了变质岩区构造裂隙水、风化壳裂隙-孔隙水、层状裂隙水和接触型基岩裂隙水四种地下水类型的赋存规律及电性特征.结果 表明:构造裂隙水主要赋存在构造破碎带内;风化壳裂隙-孔隙水分布普遍,水量小,一般沟谷风化壳与断裂叠加带富水性较大;层状裂隙水和接触型基岩裂隙水主要赋存在硬脆-软塑岩性组合的接触带(面)上.在视电阻率等值线断面上,构造裂隙水呈现为陡降低阻带曲线;与构造复合的风化壳裂隙-孔隙水,呈现为凹型低阻曲线;层状裂隙水面状分布,呈现为水平低阻曲线;岩脉接触型基岩裂隙水,呈现为条带状高阻+类断层低阻反映.

在区域水文地质调查和探采结合井实例的基础上,基于蓄水构造理论,对阜平岩群变质岩区蓄水构造类型及其富水特征进行了分析,认为主要有风化壳蓄水构造、断裂蓄水构造、层状蓄水构造和岩脉蓄水构造4类.风化壳蓄水构造和断裂蓄水构造是主要找水方向.根据探采结合井的抽水试验数据,对地下水主要出水段埋深与标准井径降深涌水量的相关性进行分析,表明标准涌水量与出水段埋深呈幂级函数减小的趋势.

The paper is based on investigation and evaluation of frangibility of groundwater system in the Cangzhou city and describes the application of MAPGIS software in the process of data analysis,concludes the vulnerability assessment chart of groundwater system in the urban of Cangzhou city.

Based on analytical causes of Cangzhou City ground settlement,taking accumulated thickness of cohesive soil layer,mining intensity of underground water,depth of underground water table,geothermal water resources mining,building capacity and accumulated settlement as environmental geological factors for ground settlement hazard evaluation and through fuzzy techniques,calculation of evaluation index and integrated dangerous estimation,this paper has concluded that as decrease of evaluation index,dangerous degrees of ground settlement of evaluation hazard in Cangzhou will be reduced from central city area inside second circle line to outside area.

该标准是以<供水水文地质勘察规范>(GB50027－2001)为基础进行编制的.它侧重和扩充了对勘查工作有实践指导意义的技术方法,纳入了近年来行之有效的新技术、新方法.能够对供水水文地质勘查起到具体的规范指导作用.它与<供水水文地质勘察规范>(GB50027－2001)相互关联,共同使用.