Correction of the Seepage Velocity of Soluble Contaminants in Sand with Different Particle Size Distribution
In order to investigate the influencing flow factors in the process of soluble contaminant transport and analyze the seepage velocity regularity of sand with different particle size distribution. This article made a series of indoor tests, in which single hole tracing method based on the dilution method was used to measure the seepage velocity of sand. Six kinds of different particle size distribution of sand were used as research objects. The tracer was placed in the observation hole in the sand to mark the water and simulate the migration of soluble pollutants. Divided into different particle size distribution of sand is primarily performed by coefficient of uniformity and coefficient of curvature. The results show that the logarithmically measured test data in the observation hole is linearly and negatively correlated with the time, and the percolation velocity increases linearly with the increase of the head. There are obvious and definite differences between the calculated seepage velocity and the measured seepage velocity of each sand sample. Considering that the difference is related to the basic properties of the sample, a correction coefficient γ is introduced to correct the formula for calculating the seepage velocity in the single-hole tracing method.
KeywordsSeepage velocity Particle size Correction formula
This work is supported by the National Natural Science Foundation of China (Grant No. 51778210) and the Natural Science Foundation of Jiangsu Province (No. BK20151495).
- 3.Libby JL, Robbins GA (2013) An unsteady state tracer method for characterizing fractures in bedrock wells. Ground Water 120(45):1–9Google Scholar
- 7.Ren H (2013) Advance of the technique to determine the velocity and direction of groundwater by single-hole isotope diluting and tracing method. Int Seism Dyn 02:5–15Google Scholar
- 8.Chen J (2002) Generalized physical model of tracer dilution for measuring seepage velocity in well. J Hydraul Eng (09)Google Scholar
- 9.Du G (1994) Experimental study of the isotope tracing method to test the multiple-aquifer mixed well. Site Investig Sci Technol (05)Google Scholar
- 10.Allison G (1986) Guidebook on nuclear techniques in hydrology (1983) Edition. J Hydrol, 85(1–2). CrossRe, 200–201Google Scholar