长江流域全新世古洪水研究进展

A Study Progress of the Holocene Paleofloods along the Drainage Basin of the Yangtze Rivet

洪水是我国平原地区的主要自然灾害之一,尤其是低频特大洪水危害严重,是防灾减灾的重点.然而,由于实测洪水资料和历史洪水资料的有限性,目前对于低频特大洪水的了解尚难以满足重大工程设计的需要.通过古洪水研究,了解洪水发生的条件及规律,可以为解决这一问题提供科学依据.本文介绍了长江流域古洪水研究的信息载体,研究方法,重现期,及研究古洪水的意义.

Flood is one of the main natural disasters in plain areas in China,and low-frequency extreme floods are espesially serious, which are the vital part of catastrophic prevention and reduction. However, understanding about low -frequency of extreme flodds can＇t support the design of important projects at present because of its limit in present and historic flood metrical data. Study on paleoflood can help discovet the conditions and rules of flood,and provide scientific proofs for this point. This paper discusses the informational carriers, methods, recurrence interval and significance ofpaleoflood study about the drainage basin of the Yangtze River.