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Abstract:
The region of the Bobrowiec Massif, crucial in underground flows within the Chocholowski Stream catchment area, was not studied in details until the 50ies. The Chocholowskie Vaucluse Spring is recharged mainly by karst systems, including that of the Szczelina Chocholowska - Jaskinia Rybia caves. The remaining 20% of water in the system comes from surface waters of the Chocholowski Stream. First successful dye tests were conducted on this system in 1971/1972. The paper presents data and interpretation of the recent dye-tracer experiments for the Chocholowskie Vaucluse Spring recharge area. The results of these tests prove that the connection between the Szczelina Chocholowska - Rybia caves karst system and the Chocholowskie 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 distinctly visible