新疆伊犁河谷地下水循环演化特征

发布时间：2018-04-26 04:20

本文选题：区域地下水 + 水流理论　；参考：《干旱区研究》2017年01期

【摘要】：以区域地下水流理论为指导,采用水化学与同位素分析、地下水流数值模拟等方法,以南北向"1号水文地质剖面"为主要研究对象,对伊犁河谷地区地下水化学、同位素、地下水流系统进行研究,分析总结了地下水循环演化规律。结果表明:主要阴、阳离子自北向南呈现出同步的变化规律,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。δ~2H及δ~(18)O自北向南沿途变化不大。"1号水文地质剖面"潜水为1952年以来补给的地下水。划分为3级循环系统,依次为局部、中间和区域地下水流循环系统。其循环周期依次为5~10 a、30~40 a以及20 000 a左右。与此相对应,划分为浅部强径流区、中部中等径流区和深部弱径流区,径流速率依次为0.5 m·d~(-1)、0.1~0.5 m·d~(-1)及0.1 m·d~(-1)。建议优先开发利用浅、中部循环地下水,保护好深部循环地下水。
[Abstract]:Guided by the theory of regional groundwater flow, using hydrochemical and isotopic analysis and numerical simulation of groundwater flow, the study of groundwater chemistry, isotopes and groundwater flow system in the Yili valley area is studied in the north and south of the "No. 1 hydrogeological section", and the groundwater circulation evolution law is analyzed and summarized. The results show that: The main Yin, the cation from north to South presents a synchronous change rule, from north to south water chemical type is HCO_3-Ca, HCO_3-SO_4-Ca-Mg, HCO_3-SO_4-Ca-Na. Delta ~2H and delta ~ (18) O change little from north to south. "No. 1 hydrogeological section" dive is the groundwater that has been supplementing since 1952. It is divided into 3 cycle system, which is in turn as part of the system. 5~10 a, 30~40 A and 20000 a are the cycle cycles of inter and regional groundwater flow, which are divided into shallow strong runoff regions, middle middle runoff regions and deep weak runoff regions, and the runoff rate is 0.5 m d~ (-1), 0.1~0.5 m. D~ (-1) and 0.1 Water protects the deep circulating groundwater.

【作者单位】：中国地质调查局国土资源实物地质资料中心;中国地质调查局国土资源实物地质资料中心秦皇岛海平面监测站;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】：中国地质调查项目“新疆伊犁河谷地下水资源及环境问题调查与评价(1212011220972);新疆伊犁河谷霍城-霍尔果斯口岸水文地质调查(12120115046401);伊犁河谷西部平原区1:5万水文地质调查(121201011000150021)”资助
【分类号】：P641.6

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