RIVERS' FEATURES ON ALLUVIAL FANS IN NORTHWEST CHINA

作     者：ZHU Zhongli MO Duowen (Department of Geography, Peking University, China) 

出 版 物：《International Journal of Sediment Research》 (国际泥沙研究(英文版))

年 卷 期：1999年第14卷第2期

页      面：339-344页

核心收录：

学科分类：08[工学] 081502[工学-水力学及河流动力学] 0815[工学-水利工程] 

主　　题：Alluvial fan River patterns Precipitation and sedimentary condition. Climate changes Boundary condition 

摘      要：Braided river is considered as the main river pattern developed on alluvial fans. But this is not true in Northwest China. Analysis and correlations of the characteristics of more than 10 rivers show that straight river is the main river pattern and braided river only develops on middle segment of the river in this district. The main factor to shape this river pattern on alluvial fans is the standing incision due to changes in precipitation and sedimentary condition caused by climate change since Holocene. Because of the tectonic movement and boundary condition from gravel to loess-like sediment. some rivers have fan-head trenching and others have fan-toe trenching with the U-shaped cross section.