六千年来韩江三角洲的滨线演进与发育模式

本文应用¹⁴C年代学、沉积学、地貌学、历史地理学,现代动力过程等方法,论证了距今6000年、5000年、4000—2500年,汉代、唐初、宋末、清末的滨线位置及其演进趋势。提出其6000年来的发育模式为:1.三角洲两期发育,河流两级分汊;2.沙洲(沙堤)併岸,平原扩展;3.洪泛(风力)加积,地面堆高;4.右汊萎缩,左汊发展,干流左移。

THE SHORELINE EVOLUTION AND THE DEVELOPMENT MODEL OF THE HANJIANG RIVER DELTA DURING THE PAST 6000 YEARS

14 C geochronology, sedimentology, geomorphology, historical geography and modern dynamic process methods were applied to prove the positions and evolution trend in 6000 ys.B.p.,5000ys.B.P., 4000-2500y s .B . P ., Han Dynasty, Tang Dyansty, Late Song Dynasty and Qing Dyansly.The development model of the Hanjiang River Delta was suggested as follows. 1. the delta had two development stages, the river had two-class distributaries, 2, the shoals and sand bars linked up river banks and the plain extended, 3. flood and wind carried deposit and built up land 4 the west distributary shrank, the east distributary developed, and the main river moved north-eastward .