胶东平度北部山区地下水蓄水构造与开采条件分区

Groundwater Storage Structure and Mining Condition Zoning in the Northern Mountainous Area in Pingdu City in Jiaodong Area

摘要:

平度北部山区位于胶北隆起西南与胶莱盆地的西北部，属鲁东低山丘陵松散岩、碎屑岩、变质岩类为主水文地质大区，胶莱盆地和胶北低山丘陵两个水文地质亚区。开展1∶5万水文地质调查，综合运用物探、水文地质钻探、抽水试验等工作手段，分析了研究区气象水文、地层构造、水文地质条件，划分了松散岩类孔隙水、碎屑岩类孔隙水、碳酸岩类孔隙水和基岩孔隙水4种地下水类型。分别从地形地貌、地层构造、含水层岩性、补径排条件等因素研究地下水富集规律，新发现东柳圈基岩裂隙水富水地段，可作为小型水源地，为城市应急供水。总结了研究区两种蓄水构造，分别为断裂破碎带型和岩性接触带型。通过分析研究区地下水富集规律和不同蓄水构造类型地下水的补径排特征及赋存情况，分析了地下水开采条件，为平度北部山区的找水打井提供技术支持。

Abstract:

The mountainous area in northern Pingdu city is located in the southwest of Jiaodong uplift and the northwest of the western Jiaolai basin. It is a hydrogeological area dominated by loose rocks, clastic rocks and metamorphic rocks in the low hills in Ludong area, Jiaolai basin and the low mountains and hills of northern Jiaolai basin. Hydrogeological survey with the scale of 1∶50000 has carried out, and meteorological and hydrogeological conditions, stratigraphic structures and hydrogeological conditions in the study area have been analyzed by means of geophysical prospecting, hydrogeological drilling and pumping tests. Four types of groundwater have been classified, which are pore water of loose rock, pore water of clastic rock, pore water of carbonate rock and pore water of bedrock. Based on the study of groundwater enrichment law from the aspects of topography, structure, aquifer lithology, recharge and drainage conditions, a new fissurewaterrich section of bedrockfissurewaterrich section of Dongliuquan area has been discovered. It can be used as a small water source for urban emergency water supply. Two types of water storage structures in the study area have been summarized, which are fracture zone type and lithologic contact zone type respectively. Based on the analysis of groundwater enrichment law and the characteristics and occurrence of recharge discharge of groundwater in different water storage structure types in the study area, the groundwater exploitation conditions have been summarized. It has a good guiding significance for water search and well drilling in the mountainous area in northern Pingdu city.