GEOLOGIC HAZARD FROM BOUNDARY RIVER BANK COLLAPSE IN HEI LONGJIANG PROVINCE AND ITS PREVENTION AND CONTROL MEASURES

The boundary river bank collapse is a main and special geologic hazard in Heilong jiang Prorince. This problem is must be resolved as soon as possible.In this paper, we summarize the river banks collapse situation of the two main rivers, Heilongjiang and Wusuli rivers in Heilongjiang Province, find the distribution regularities of the band collapses of the boundary river banks collapses, identifized, discussed the formation mechanism of the collapses and analysed the causes for the boundary river banks collapses. Finally, a series of the morphologic types prevention and control measures is suggested for the boundary river banks collapses.