国家自然科学基金项目(40971008和40771213)和中国科学院地球环境研究所黄土与第四纪地质国家重点实验室开放基金 项目(Grant SKLLQG0908)资助。
Abstract：Remote sensing images of the Jialing River’s old channel reflect the river pattern information of the free meanders. The analysis of the development condition of the old meanders of the Jialing River has important geomorphological significance in the reconstruction and restoration of the regional paleogeographic environment. On the basis of previous researches and practical cases on the free meanders, this paper summarized development conditions of the free meander. On such a basis, in combination with field investigation data, the authors hold that, when the ancient meander stared its formation, the area was a flat and wide plain landform, and the channel gradient ratio was smaller than the present value. Materials of banks on both sides of the river were composed of unconsolidated sediments characterized by “dualistic structure ”. This geographical environment was similar to the that of the lower part of the Jingjiang River that belonged to the Yangtze River. Moreover, the pattern of “ three confluence rivers ” composed of the main stream of the Jialing River and its tributary ( Qujiang River and Fujiang River ) had already existed at that time. The transformation of the free meander to the incised meander of the Jialing River was caused by change of the regional geological environment or the geological events.
江华军 李长安 张玉芬 王节涛. 嘉陵江古河曲发育的古地理环境重建[J]. 中国地质, 2013, 40(2): 460-468.
JIANG Hua-jun, LI Chang-an, ZHANG Yu-fen, WANG Jie-tao. The reconstruction of paleogeographic environment for the development of the Jialing River’s ancient meander[J]. Geology in China, 2013, 40(2): 460-468(in Chinese with English abstract).