响水溪泉岩溶地下水水化学特征及成因

响水溪岩溶大泉位于雅安市天全县响水溪村，为研究该地区地下水循环模式与泉水成因，2022年2月在现场进采集水样12组，通过Piper图示、离子比例分析对该地区的水化学特征进行分析。基于研究区的水文地质条件、地下水补径排规律利用水均衡法、同位素特征分析对响水溪泉成因进行了验证。结果表明，响水溪地区的地下水水化学类型普遍为HCO₃-Ca·Mg型，其离子组分主要受到白云岩、灰岩的风化溶解。响水溪岩溶大泉最直接的补给含水层为灯影组(Z₂C-₁d)岩溶含水层。除此之外，受构造作用其补给同时也受到北侧二叠系阳新组(P₂y)、泥盆系(D_2-3)碳酸盐岩裂隙溶洞水影响。

Hydrochemical characteristics and genesis of karst groundwater in Xiangshuixiquan

Xiangshuixi Karst Spring is located in Xiangshuixi Village, Tianquan County, Ya''an City. In order to study the groundwater runoff model and spring origin in this area, 12 groups of water samples were collected on site in February 2022, and the hydrochemical characteristics of this area were analyzed through Piper diagram and ion proportion analysis. Based on the hydrogeological conditions of the study area, the law of groundwater recharge, runoff and discharge is analyzed, and the origin of Xiangshuixi spring is verified by water balance method and isotope characteristics analysis. The results show that the groundwater water chemistry type in Xiangshuixi area is generally HCO3--Ca· Mg type, its ionic components are mainly weathered and dissolved by dolomite and limestone. The most direct recharging aquifer of Xiangshuixi Karst Spring is the karst aquifer of the Dengying Formation (Z2?1d). In addition, its replenishment was also affected by the water of the Permian Yangxin Formation (P2y) and Devonian (D2-3) carbonate fracture caves on the north side.