THE EXCESSIVE RAIN OVER THE MIDDLE-LOWER REACHES OF CHANGJIANG RIVER AND ITS RELATION TO VOLCANIC ERUPTIONS IN HISTORY

Based on the historical data of the excessivc rains ovcr the middle-lower reaches of Changjiang River in two hundred and fifty years (1651-1900) and the data of "Very Large" volcanic eruptions (VEI≥5) in the period of 1650-1900,which are selected from the table of volcanic eruption year complied by Simkin et al.(198l).This paper analyses the interannual variation of various kinds of continuous rains in the historical period,as well as the relation between plum-continuous rains and waterlogging along Chang-jiang-Huaihe reaches,and between "Very Large" volcanic cruption and continuous rains over the middlelower reaches of Changjiang Rivex.