基于同位素的豫北平原浅层地下水形成的认识  

Formation of the shallow groundwater in the Northern Henan Plain based on isotope ananlyses

作　　者：苗晋祥[1] 

机构地区：[1]河南省地质调查院,郑州450001

出　　处：《水文地质工程地质》2010年第4期5-11,共7页Hydrogeology & Engineering Geology

基　　金：华北平原地下水资源可持续利用调查评价(河南)(200310400004)

摘　　要：在进行地下水资源评价时,地下水的补给排泄均衡项有许多不确定因素,这大大降低了评价的精度。如何提高地下水资源评价的精度,成了水文地质工作者的一大难题。本文从地下水形成的补给源方面,用三种方法进行了提高地下水资源评价的精度的探索。①地下水同位素含量的变化与组合能反映地下水资源量的变化,因此,本文利用同位素技术确定地下水补给源,进行均衡区划分;②利用放射性同位素131I流速测井法计算河流补给量;③利用地下水同位素18O值,计算黄河水入渗补给地下水的比例。这三种方法可间接地提高地下水资源评价的精度。另外,在充分考虑了地下水的可恢复性,利用同位素T(3H)估算了浅层地下水更新速率,从另一个角度进行了地下水资源评价,这在制订地下水资源可持续利用规划中是至关重要的,本文也进行了这方面的尝试性的估算。Precision of assessment of groundwater resources is greatly affected by many indeterminacy factors in items of charge and discharge of a groundwater system.Increase of the precision of assessment of groundwater resources is of important significance to hydrogeologists.This paper introduced three means to enhance the precision of assessment of groundwater resources examining the replenishment of the shallow groundwater.（1） Combination of elements and change in isotope contents in groundwater can reflect the change in quantity of groundwater resources.Recharge items of groundwater resources are determined and portioned in this paper with isotope techniques.（2） The recharge quantity of the local river with 131I element flowing velocity is calculated.（3） The proportion recharged by the Yellow River the in groundwater resources is calculated with contents of 18O.As a result,precision of assessment of groundwater resources is indirectly enhanced.In addition,estimation of the renew velocity of the shallow groundwater is also helpful in the assessment of groundwater resources,and is importance in sustainable use of groundwater resources.Attempt is also made to estimate the renewable velocity of the shallow groundwater with contents of T（3H） element in groundwater.

关 键 词：同位素技术 地下水补给源 地下水资源评价 华北平原(河南部分) 

分 类 号：P641.2[天文地球—地质矿产勘探]