摘要： 瓦约村隶属于西藏昌都市察雅县,通过遥感解译可直观地观察到其特殊的河流地貌: “离堆山”与环状负地形。据调查,负地形内发现了典型的河流相沉积,确定为古河道地貌类型。另外,在古河道下河口发现了特殊的河湖交汇相沉积,表明历史上曾发生过堵江事件,为河流改道原因提供线索;同时推断当时的河流环境极其动荡,存在数次洪水期和间歇期,可能与末次冰期有关。结合遥感解译及地质背景,最终得出澜沧江瓦约村段河流演化模式。由于瓦约村位于中国川藏铁路规划沿线,工程地质意义重大,研究成果对于保障铁路工程的顺利进行及工程安全具有重要意义。

关键词: 古河道, 河流地貌, 堵江事件, 演化模式, 川藏铁路

Abstract: The Wayue village belongs to the Chaya County,Changdu City,Tibet. Through remote sensing interpretation,we can intuitively observe its special river topography:“solitary mountain” and ring-shaped negative land. According to the survey,typical river deposits were found in the negative land. Identified as the palaeoriver channel landform. In addition,special river-lake confluence deposits were found at the mouth of the ancient channel,indicating that the river was blocked in history,providing clues to the cause of the river diversion,and inferring that the fluvial environments at that time were extremely turbulent,with several flooding periods. During the intermittent period,we speculates that it might have been related to the last glacial period. Combined with remote sensing interpretation and geological background,the river evolution model of the Wayue village of the Lancang River is finally summarized. Because Wayue village is located along the national Sichuan-Tibet Railway,engineering geology is of great significance. The research results presented in this article are of great significance for ensuring the smooth progress and safety of railway projects.

Key words: palaeoriver channel, river landform, river blocking incident, evolutionary pattern, Sichuan-Tibet Railway

中图分类号: 

• P931