水化学在新疆伊犁河谷地下水循环中的指示作用

发布时间：2018-03-01 09:21

本文关键词： 水化学伊犁河谷地下水循环指示作用　出处：《水文地质工程地质》2016年04期 　论文类型：期刊论文

【摘要】：在分析研究区水文地质条件基础上,沿地下水运动方向,重点研究典型剖面水化学在地下水循环演化的指示意义。结果表明:"1号剖面"潜水主要水化学组分浓度在地貌类型(强倾斜砾质、缓倾斜含砾细土、冲洪积细土平原区)分界部位浓度上升,出现峰值。由北向南水化学类型依次为HCO_3—Ca、HCO_3·SO_4—Ca·Mg、HCO_3·SO_4—Ca·Na。"2号剖面"主要阳离子与阴离子具有相同的变化规律,在沿程变化图中出现了一个明显的拐点,即水样F4W04点。从水样点YN01W20到F4W04点,如Ca2+从188.4 mg/L降至48.1 mg/L等。由北向南水化学类型依次为HCO_3·SO_4—Ca·Na、HCO_3·SO_4—Ca·Mg、HCO_3—Ca。水化学结果指示了存在局部循环系统、中间循环系统,地下水以水平方向运移演化特征为主,循环交替强度由北向南逐步减弱,并且地下水循环速率与所处地貌类型紧密相关。
[Abstract]:On the basis of analysis of hydrogeological conditions in the study area, along the direction of groundwater movement, This paper focuses on the indicative significance of hydrochemistry in groundwater cycle evolution of typical sections. The results show that the concentration of the main water chemical components in the phreatic water of "Section 1" lies in the geomorphologic types (strong gravelly, gently inclined gravel fine soil). From north to south, the chemical types of water are HCO3-CaHCO3 路SO_4-Ca 路MgHCO3 路SO_4-Ca 路Na.The main cations and anions in Section 2 have the same change law, and there is an obvious inflection point in the diagram of variation along the course. From YN01W20 to F4W04, such as Ca2 from 188.4 mg/L to 48.1 mg/L, etc. From north to south, the chemical type of water is HCO_3 路SO_4-Ca 路Nahco _ 3 路SO_4-Ca 路MgHCO _ 3-Ca.The hydrochemical results indicate the existence of local circulatory system and intermediate circulation system. The characteristics of horizontal migration and evolution of groundwater are dominant, the alternating intensity of circulation decreases gradually from north to south, and the circulation rate of groundwater is closely related to the geomorphological type in which it is located.
【作者单位】：中国地质调查局国土资源实物地质资料中心;中国地质调查局西安地质调查中心;长安大学环境科学与工程学院;
【基金】：新疆伊犁河谷地下水资源及环境问题调查与评价(1212011220972)
【分类号】：P641.3

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