摘要
作者首先叙述了钱塘江水系地理概况和洪水简史 ,认为 :季风气候条件和七里泷峡谷对洪水的阻挡是洪水形成的两种主要原因。本文提出下列见解 :(1)根据河床砂砾滩的分布探讨洪水时期河流的沉积、堆积作用 ;(2)支流河口砂砾滩对主河道的阻塞 ,以及 (3)
A introduction to the geographic feature and the short history of flooding events of Qiantangjiang river system is made in the paper.The author considers that the floods are resulted from two main causes:the subtropic monsoon-climate condition and the narrow Qililong gorge as a obstructing to delay the floodwater velocity.And some main ideas are mentioned as follows :(1)the alluvial sedimentation and accumulation during flood period based on the distrubution of sand-gravel bars,(2)the sand-gravel bars at the mouths of tributaries blocking the main river channel,and(3)the sand-gravel bars at the main river beds having a severe influence on mearly complete ruin of inland navigation in recent years.
出处
《浙江地质》
2002年第1期48-52,共5页
Geology of Zhejiang
