Method for measuring karst underground water migration path by taking sugars as tracers

Abstract

The invention discloses a method for measuring a karst underground water migration path by taking sugars as tracers. The method particularly includes the steps: arranging and designing a launching trap and a monitoring well; pre-treating the tracers; throwing the tracers; determining a water flow direction; determining the flow speed of underground water; determining the throwing quantity of the tracers; throwing the tracers into the launching trap; sampling and detecting the tracers in the monitoring well; analyzing the underground water migration path according to results. The sugars are used as the tracers for detecting the flow speed and the flow direction of the karst underground water and are non-toxic, pollution-free, low in natural background value, free of interference, stable in chemical performance, easy in detection, high in sensitivity and low in cost, the migration direction of the underground water is not changed, environmental pollution is avoided, and harm to health of operators is also avoided.

Description

technical field [0001] The invention belongs to a tracer method for determining the migration path and seepage velocity of groundwater in karst aquifers, and relates to the study of using edible monosaccharides and disaccharides as tracers to measure groundwater movement under karst geological conditions, and belongs to seepage in karst water-bearing systems and groundwater movement observations. Background technique [0002] The karst groundwater circulation system is not only controlled by the topographical conditions, but also by the geological structure. Since the development of karst and the migration of karst groundwater generally have obvious heterogeneity, in addition to the characteristics of ordinary karst pores, there are also developed Pipeline media such as karst caves and fissures have different karst shapes, many seepage and water outlet points, large changes in water conservancy slopes, and obvious differences in hydraulic flow rates, forming an intricate hyd...

AI Technical Summary

Problems solved by technology

Although these tracer techniques are widely used in various geological karst areas, they also have disadvantages to varying degrees: chemical tracers are usually used in large quantities, with high costs and large detection errors; isotope tracers require professional construction The use of special equipment for detection will pollute the water environment, which is not conducive to large-scale promotion and application

[0006] CN1699998A discloses a kind of constant material tracer used in the monitoring process of geological karst area and the use method of the tracer in the dynamic monitoring of oil reservoirs, wherein the tracer provided is lanthanide element cable, which is lanthanum, Any one or more of cerium, 鐠, rubidium and other elements; these elements are often used with complexing agents such as: ethylenediaminetetraacetic acid, EDTA, ethylenediamine, ethyltriacetic acid, diethylenetriaminepenta Acetic acid and nitrilotriacetic acid are used together to form a complex, which has certain shortcomings in use. Most of the main liquidation tracers have poor temperature resistance, and these tracers cannot withstand high geological salinity. Under salinity conditions, the tracer will undergo a chemical reaction and lose its tracer function

In addition, the analytical accuracy of these tracers decreases in high-salinity environments, and even invalidates the analytical results

[0007] CN98114214.1 discloses a chemical tracer inter-well tracer measurement technology. In the practical application of chemical tracer monitoring technology in geological karst areas, there are problems of poor chemical stability, insufficient high temperature resistance, low high salinity resistance, Disadvantages of unstable detection accuracy

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