Study on the flow state of groundwater by isotope tracer

LIN Tong~

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Study on the flow state of groundwater by isotope tracer

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- Study on the flow state of groundwater by isotope tracer
- NUCLEAR TECHNIQUES Issue 10, (2008)
- 作者机构：
  
  1. 河海大学水文水资源与水利工程科学国家重点实验室
  2. 河海大学水文水资源学院
  3. 河海大学岩土工程研究所
- 作者简介：
- 基金信息：
  
  国际原子能机构TC项目(PRC\08\015);国家自然科学基金项目(50579017);江苏省“六大人才高峰”项目资助
- DOI：
  CLC： P641.7
- Published：01 October 2008
- 稿件说明：
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[1]林统,陈建生,陈亮.地下水不同流态的同位素示踪探测分析[J].核技术,2008(10):745-750.

LIN Tong~. Study on the flow state of groundwater by isotope tracer[J]. Nuclear techniques, 2008, (10): 745-750.
[1]林统,陈建生,陈亮.地下水不同流态的同位素示踪探测分析[J].核技术,2008(10):745-750. DOI：

LIN Tong~. Study on the flow state of groundwater by isotope tracer[J]. Nuclear techniques, 2008, (10): 745-750. DOI：

摘要

同位素示踪测井技术是研究地下水运动的有效手段。注入测井的同位素示踪剂会随着测井内水流运动

因此不同流态测井内示踪剂的分布亦不同。由放射性强度随深度变化关系可确定示踪剂在测井内的浓度分布

从而了解测井内水流的运动状态。结合工程实际测量数据

分别分析了层流、紊流及单孔中既有层流又有紊流情况下测井内放射性强度分布特点

给出了流速的计算公式;同时介绍了在混合流时区分层流段和紊流段的方法。对比分析了误判地下水流态带来的流速计算误差

指出正确把握地下水流态是非常重要的。最后总结了利用同位素测井技术解决工程实际问题时需要注意的问题

以及不同水文地质条件下合适的测量方法。

Abstract

Radioisotope logging technique is an effective method to evaluate groundwater movement.Moving with the water

the isotope tracer distributes differently in different flow states.According to the depth and time distribution of radioactivity

flow state of the groundwater can be determined.In this paper

different flow states

i.e. laminar flow

turbulent flow and mixing flow

are analyzed

and calculation of the flow velocity is discussed.Also

we discuss how to distinguish the laminar flow part and turbulent part in a mixing flow.If one judges the flow state incorrectly

the error of flow velocity will be huge

hence the importance of flow state analysis.Finally

some problems in the practical projects and measuring methods are concluded.

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