章丘百脉泉群核心出露区水文地质特征及敏感保护区划分

为了查清章丘百脉泉出露区浅部微观地质条件及其与泉水的关系，通过物探、钻探、水位观测等多种手段，查明断裂构造发育特征，刻画泉水出露区浅部地层结构，分析出露区泉水喷涌主要影响因素，划分敏感保护区范围。结果表明：出露区断裂构造极为发育，共发育5条断层、1个破碎带，为岩溶水上涌提供了通道；卵砾石层在断裂两侧普遍发育，呈现中间厚向两侧变薄并逐渐尖灭的特征，卵砾石层为泉水上涌后提供了赋存空间，在埋藏较浅处涌出成泉。出露区影响泉水喷涌的主要因素为断裂构造的控制作用和卵砾石层的连通、透水作用。综合断裂构造和卵砾石层的发育厚度划分了敏感区和较敏感区，面积分别为0.78 km²和0.67 km²。

Hydrochemical characteristics and delimitation of sensitive protection area in the exposed area of Baimai spring group in Zhangqiu

Zhangqiu is rich in spring resources, known as the "Little Spring City", and Baimai spring group is among the 72 famous springs in Jinan. In recent years, the flow of Baimai spring group has been cut off for many times, and the competent departments have implemented a series of spring protection measures to basically maintain the continuous gushing of spring water. Against the backdrop of the planned development and construction of the core exposed area of the spring group, it is urgent to investigate the shallow micro-stratigraphic structure of the exposed area and its relationship with the spring water, in order to avoid the negative effect of engineering construction on the gushing of spring water. Based on the data collected from years of exploration for water supply in the exposed area of spring, this study has been conducted to identify the shallow stratigraphic structure and structural development characteristics of the exposed area of spring, with the methods of geophysical exploration, drilling, and water level observation. Meanwhile, the main influencing factors of spring water gushing in the exposed area have been analyzed, and the sensitive protection area has been delimited. The research findings may provide a scientific basis for the development and construction of the core exposed area of the spring group, and also for the spring water protection.