新疆伊犁河谷地下水循环演化特征  

Evolution of Groundwater Circulation in the Yili River Valley in Xinjiang

作　　者：邵杰[1,2] 李瑛[3,4] 侯光才[3] 王文科[4] 曾磊[3,4] 段磊[4] 

机构地区：[1]中国地质调查局国土资源实物地质资料中心,河北三河065201 [2]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,河北秦皇岛066002 [3]中国地质调查局西安地质调查中心,陕西西安710054 [4]长安大学环境科学与工程学院,陕西西安710054

出　　处：《干旱区研究》2017年第1期20-25,共6页Arid Zone Research

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

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。Based on the theory of regional groundwater flow,water chemistry and isotope analysis,the groundwater flow numerical simulation and other methods were used to study the groundwater chemistry,isotope and groundwater flow system in the Yili River Valley. The results showed that the main negative and positive ions from the north to the south changed synchronously,and the chemical types from the north to the south were in an order of HCO3-Ca,HCO3- SO4- Ca- Mg and HCO3- SO4- Ca- Na. δ^2H and δ^18O changed slightly from the north to the south.Groundwater along the ＂Hydrogeological Section No. 1 ＂was recharged since 1952. The groundwater circulation system was divided into three stages,i. e. the local,intermediate and regional stages. The periods of water cycle were 5- 10 a,30- 40 a and 20 000 a respectively. Correspondingly,the study area was divided into the shallow strong runoff area,central intermediate runoff area and the deep weak runoff area,and the runoff rates in these areas were 〉0. 5 m·d^- 1,0. 1- 0. 5 m·d^- 1and 0. 1 m·d- 1respectively. It was suggested to preferentially exploit and utilize shallow and intermediate cycle groundwater and well conserve deep cycle groundwater.

关 键 词：区域地下水 水流理论 地下水流系统 水循环 水化学 同位素 伊犁河谷 新疆 

分 类 号：P641.6[天文地球—地质矿产勘探]