Abstract: The Luota Area in Northwestern part of Hunan Province is a synclinal confluence basin of bare karst. It has a special hydrogeological structure composed by several karstified aquifers which are connected, but in some cases separated each other by non-soluble beds ( Multi-aquifer). There are many subterranean streams totalling 51 in number of main streams and branches, and 82 km in length. It is typical to some extent for similar karst region. The fundamental characteristics of the subterranean strea...