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Tritium gradient based method for identifying hydrological cycle information of underground aquifer

An underground aquifer and hydrological cycle technology, which is applied in the fields of nuclear radiation exploration, geophysical measurement, measurement devices, etc., can solve problems such as the difficulty of providing intuitive and scientific information on the characteristics of the hydrological cycle, the uncertainty of calculation results, etc., and achieve reliable results. High degree of accuracy, accurate and clear operation route

Inactive Publication Date: 2019-04-16
JIANGSU PROVINCE HYDROLOGY & WATER RESOURCES INVESTIGATION BUREAU
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Problems solved by technology

When the tritium activity of the tested aquifer is low, the calculation results of these models will have great uncertainty, and the calculated groundwater age is also the approximate average age of the entire aquifer, which is difficult to judge the hydrological cycle characteristics of the aquifer. Provides intuitive scientific information, so further research is required

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  • Tritium gradient based method for identifying hydrological cycle information of underground aquifer
  • Tritium gradient based method for identifying hydrological cycle information of underground aquifer
  • Tritium gradient based method for identifying hydrological cycle information of underground aquifer

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Embodiment Construction

[0036] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0037] In this embodiment, a certain underground aquifer in the source area of ​​the Yellow River is taken as the research object, a tritium activity tracer is artificially injected, the tritium activity of the underground aquifer is measured regularly, and the hydrological cycle information of the underground aquifer is comprehensively identified.

[0038] The identification method of hydrological cycle information of underground aquifer based on tritium gradient, such as figure 1 shown, including the following specific steps:

[0039] Step 1: Add 3 liters of known tritium activity to a 0 T 0 = 60TU of tracer put into a specific underground aquifer;

[0040] Step 2: Collect water samples for this specific underground aquifer every 15 days, select a low-background liquid scintillation instrument and its pretreatment system (model: Tri-Carb 3...

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Abstract

The invention provides a tritium gradient based method for identifying hydrological cycle information of an underground aquifer. The method comprises the steps that a tracer agent with known tritium activity is put into the specific underground aquifer; the tritium activity of the specific aquifer is measured, and the tritium activity sequence curves are drawn; the tritium activity time change characteristics are divided, the theoretical tritium gradient curve set changing along with the decay time are drawn, the reference tritium gradient of the underground aquifer is calculated, and are marked onto the curve set to obtain the corresponding gradient curve; and then the calculated actual tritium gradient is marked on the gradient curve to obtain the average residence time of the aquifer. The identification method has perfect physical background support, the operation route is clear and definite, various hydrological cycle residence time and rate information of the underground aquifer can be quantitatively identified, the reliability of the analysis result is high, and the change condition of the tritium activity of the underground aquifer in the future can be predicted.

Description

technical field [0001] The invention belongs to the field of hydrogeology, and in particular relates to a technical method for determining the hydrological cycle characteristics and corresponding parameter information of underground aquifers based on tritium gradients. Background technique [0002] For 30 years, reflective isotope geochemical methods have been widely used in the study of groundwater hydrology. Measuring and analyzing tritium activity in underground aquifers can effectively help understand the subsurface hydrological cycle. Tritium in groundwater ( 3 H) The composition mainly comes from artificial nuclear tests between 1950 and 1970. Atmospheric precipitation continuously replenished groundwater and injected tritium of various ages. Therefore, tritium activity in groundwater can be considered as a natural tracer for groundwater recharge. In particular, tritium isotopes are chemically very stable, with a decay period of 12.43 years. At present, there are so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/00G01V5/00
Inventor 陈静钱睿智杭庆丰万程炜衣鹏龚梦熊岭
Owner JIANGSU PROVINCE HYDROLOGY & WATER RESOURCES INVESTIGATION BUREAU
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