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Recent results of the Dye Tracer Tests of the Chochołowskie Vaucluse Spring karst system (Western Tatra Mts.)

Barczyk G.

Acta Geologica Polonica

2004

Vol. 54, no. 1

169-177

The region of the Bobrowiec Massif, crucial in underground flows within the Chochołowski Stream catchment area, was not studied in details until the 50ies. The Chochołowskie Vaucluse Spring is recharged mainly by karst systems, including that of the Szczelina Chochołowska - Jaskinia Rybia caves. The remaining 20% of water in the system comes from surface waters of the Chochołowski Stream. First succesful dye tests were conducted on this system in 1971/1972. The paper presents data and interpretation of the recent dye-tracer experiments for the Chochołowskie Vaucluse Spring recharge area. The results of these tests prove that the connection between the Szczelina Chochołowska - Rybia caves karst system and the Chochołowskie Vaucluse spring is of a karst-fissure character. This hydraulic connection is a typical example of a sub-channel circulation, where flow through a karst-fissure system takes place beneath the bottom of an existing river channel. Comparing the time of dye flow through the system with water stages indicates that the system of fissures linking the sinkhole zone with the vaucluse spring is at least three fold. The inverse relation between watermark stands reflecting the degree of watering in the massif and the time, at which dye penetrates the system, is also distincly visible.

Dependence of the karstic waters in the Tatra Mts. on changing atmospheric conditions

Barczyk G., Humnicki W., Żurawska G.

Acta Geologica Polonica

2002

Vol. 52, nr 1

117-127

The paper presents data obtained from continuous limnimetric observations of the Tatra vaucluse type springs carried out in the interval 1999-2000. The comparison of 24-hour changes of the water level for particular vaucluse springs and the characteristic levels indicate a distinct correlation of the spring reaction to atmospheric changes, which is confirmed by comparison of correlation coefficients. Analysis of hydrograms from particular vaucluse springs during spring thawing, and their distinct bipartition, allows the determination of the filling times of local groundwater basins (over 7 days). Interpretation of changes in water levels for the vaucluse springs during a rainfall episode that caused the maximum filling of the massif, reveals 6-8 hours as the time of rainfall/water level reaction for the Tatra vaucluse type springs.