保持河道稳定的水沙条件及形态参数研究  

Research on Maintaining Stable Water-sand Conditions and Morphological Parameters of River Channels

作　　者：林明钦 LIN Mingqin(People’s Government of Yiting Town,Shangyu District,Shaoxing City,Shaoxing 312300,Zhejiang,China)

机构地区：[1]绍兴市上虞区驿亭镇人民政府,浙江绍兴312300

出　　处：《浙江水利科技》2025年第1期38-43,共6页Zhejiang Hydrotechnics

摘　　要：河道演变关系人们的生命和经济安全,目前河道演变没有规则,而河流阻力规律可以很好地揭示河流形态变化过程。以汾河中游段为研究对象,基于河流阻力对保持河道稳定的水沙条件进行研究,提出一个考虑来沙量和泥沙起动速度的阻力系数表达式,对其进行验证。结果表明:阻力系数表达式可以对汾河中游段河型进行划分,划分结果与实际情况一致。根据水沙条件对河流状态进行划分,提出来水无沙的新情势,在新情势下河流将长期保持单股状态,利于河型稳定。River evolution is related to people’s safety and economic security.There are no rules for the river evolution at present while the law of river resistance can well reveal the process of river morphology change.Taking the middle sections of the Fenhe River as the research object in this paper,a resistance expression including sediment input and sediment starting velocity is proposed for the influence of external conditions of river evolution.Based on the resistance equation,the river morphology expression is established and verified.The results show that the expression can be divided into river types,and the division results are consistent with the actual situation.River types are divided according to the water and sediment conditions.A new situation is proposed with water and no sediment,where it is found that the river will remain in a single state for a long time,and the river will remain stable.

关 键 词：河流形态 阻力规律 水沙条件 新情势 

分 类 号：TV147[水利工程—水力学及河流动力学]