Abstract:

In order to find out the groundwater system structure characteristics of Peak Forest plain,based on the karst hydrogeology survey, and through the artificial sampling and using high resolution field fluorescence spectrometer, the reception of the injected tracer sodium fluorescein in Peak Forest plain of eastern Guilin was detected.The results showed as follows. The plain area of groundwater was exposed mainly in ditches, lakes and wells; and the injected tracer of the number 1 point appeared after 22 days; the maximum flow rate was 19.5 m/d, with an average flow rate of 4.9 m/d; in this test section the groundwater runoff belonged to typical face-like flow pattern, and the karst aquifer media was developed even. The district had a high karstification degree of karst aquifer structure,presenting network-like; there was a uniform water level, and karst development was relatively uniform, as well as large fissures or even large-scale pipelines and underground river system, easy for the formation of karst groundwater preferential flow.

Key words: Peak Forest plain, groundwater, karst aquifer, tracer test, Eastern Guilin