长江、黄河流域全新世古洪水事件对比研究

Correlation studies on palaeoflood events in the drainage area of Yangtze and Yellow River during the Holocene

本文通过调研长江、黄河流域全新世古洪水研究相关文献,开展了两大流域全新世古洪水发生频次空间对比研究。现有资料表明,两大流域全新世古洪水在6000 a BP以前发生较少;6000-4000 a BP古洪水频次上升,在4000 a BP、3000 a BP前后均出现一个洪水多灾期;3000 a BP-1000 a BP两大流域古洪水记录频次呈递减趋势;1000 a BP以来,两大流域整体上表现为递增的趋势,而值得注意的是1000 a BP后,两大流域古洪水记录频次呈现出反相位变化的趋势。与太阳活动记录对比,发现两个流域洪水发生均与太阳活动相关,但是两个流域洪水发生对太阳活动的响应相反,长江流域在太阳活动较弱的时期,洪水多发,而黄河流域在太阳活动较强的时期,洪水多发。

Through reviewing the most available published records, the onsets of the palaeoflood events during the Holocene in the drainage area of the Yangtze River and Yellow River are correlated and comprehensively analyzed. The results show that palaeofloods in these two regions are rare before 6000 a BP and relatively strengthened during 6000--4000 a BE The palaeofloods frequently occurred at about 4000 a BP and 3000 a BP respectively, and the decreasing trends are obviously recorded between 3000 a BP--1000 a BE From 1000 a BP, frequencies of paleofloods events in these two regions exhibit the prominent rising changes trend. Regarding the special stage after 1000 a BP, frequencies of Palaeofioods in the Yangtze and Yellow River are of anti-phased features, which are proved to be responding to the solar activity variations, i.e. peak of palaeofloods frequency in Yangtze River is during solar minimum but that is during the solar maximum in Yellow River.