Identification Method of Hydrological Cycle Information of Underground Aquifer Based on Tritium Gradient

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...

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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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