去年中苏地质专家鉴定委员会对长江上游主要枢纽区工程地质条件进行查勘与初步评价期间,袁复礼教授继李承三教授关於“长江发育史’的报告(该文见本刊1956年12月号)之後,根据他多年实地观察的经验,对长江上游河流袭夺、长江地文期及长江中、下游第四纪地质等问题作了详尽的补充。由於长江河流的发育对於综合利用与开发长江的工程地质有密切关系,它指示著各种地壳运动和各个历史阶段水流动力的变迁,现袁教授已将他的报告整理成文,本刊将它发表出来,供读者作进一步的研究。 During the survey and preliminary assessment of the engineering geological conditions of the major hubs in the upper reaches of the Yangtze River by the Sino-Soviet Commission of Geological Experts last year, Professor Yuan Fuli, following the report of Professor Li Chengsan on the “History of the Yangtze River Development” (this article is published in December 1956) Based on his many years of field observation experience, the Yangtze River upper reaches of the river, the Yangtze River period and the Yangtze River middle and lower reaches of the Quaternary geology and other issues made a detailed supplement.As the development of the Yangtze River for comprehensive utilization and development of the Yangtze River project Geology is closely related, it indicates a variety of crustal movements and various historical stages of the hydrodynamic changes, Professor Yuan has now organized his report, published it, for readers to further study.