ABSTRACT
Chinese karst is well developed at South west. Central South, South east and the North. Among them Ouangxi Province is a typical area with karstic topography. The requisite condition to form karst is the soluble formations themselves. While the sufficient condition must be satisfied to cause the karstic processes developing forever. Chinese always pays attention to the physiographic stages. The traditional theory of double circulations or cycles is introduced and reviewed for karst Chinese karst development history, earth crust movement and dynamics of ground water circulations are influential one another by flow in the reverse siphons with nonlinear confined aquifer. Recently one Chinese presents assembly flow theory for karstic pipe. It captures ground water from soluble vein pipes and pore spaces. Where there originate in concentrated ground water flow, there are introduced with disciplines of karstology arid karst environmentology in China. The comparing karst works are well performed by the foreign geomorphotogist and our country experts. Their more attentions are interesting in the mechanism of mixing solution effect in shallow pumping vacua and deeper caves or pipes. For the prospecting of petroleum industry, the conception of pore throat porosity texture should combine statistical distribution character with studying. As for engineering protection in karst regions, three types of slope surface, body and foundation have considered. For the former twos, the karst caves should be abolished with more care where slope stability is damaged Especially the occurrences of carbonatite formation exist in favorable conditions prone to slide. At these conditions, the easy sliding theory must be cited so as to avoid the huge slide occurring where sliding bed of carbonatite decomposed and formed CO2 air cushion layer, while all cave pipes or holes damaging slope foundation might be strengthened by engineering protections on the base of safety thickness of cave top arch.
