HYDROGEOLOGY OF THE SONGLIAO DIVIDE AND ITS ECO-ENVIRONMENTAL INFLUENCE

The formation of the Songliao divide since Late Pleistocene is one of the most important geological events of the neotectonism in Songliao Plain. It is also the significant geological factor for the deterioration of the fragile ecoenvironment in western Songliao Plain. Based on the study of the formation, evolution, geology and hydrogeology of the Songliao divide, the impact of the formation of the Songliao divide on the eco-environment in western Songliao Plain is discussed. It is concluded that the Songliao divide is an essential geological factor for the lack of water resources and the deterioration of ecological environment in the contiguous areas of Tongyu, Changling, Qianan and Shuangliao. The impact of the neotectonism should be considered in the control and protection of the eco-environment in the region.