卡口河道河床演变规律初探——以澜沧江曼厅河段为例  

Discussing the riverbed evolution ary regularity of the bottle-neck reach —Sampling manting river reach of Lancanjiang river

作　　者：邓明文[1] 董玉文[2] 胡江[2] 疏玉清[2] 

机构地区：[1]云南省航务管理局,昆明650021 [2]重庆交通学院河海建筑工程系,重庆400074

出　　处：《重庆交通学院学报》2004年第1期100-102,105,共4页Journal of Chongqing Jiaotong University

基　　金：九五"交通部通达计划科研项目(95 06 02 10);山区卡口河道水沙运行机理;演变规律及治理措施

摘　　要：以澜沧江曼厅卡口河段为例,通过概化定床河工模型和动床河工模型试验,探讨了卡口河道的平面形态,水流特征及河床演变规律.得出以下结论:①卡口河道的水面线是折线型曲线;②河床演变具有洪冲枯淤、涨淤落冲、上冲下淤等变动回水区河道的特性;③卡口河道涨水变形小、落水时会形成横向切割冲刷水流,导致边滩、河岸倒塌拓宽,形成多汊道浅滩、散乱浅滩或游荡性浅滩等.Selecting Manting river reach as the sample,the plain-form,characteristics of the flow and riverbed evolutionary regularity are discussed by generalized fixed-bed and mobile-bed river engineering model.Results show that the surface curve of the bottle-neck reach is polygonal line,and riverbed evolution represents the characteristics of fluctuating backwater area and plain tract such as scouring when water flooding,falling and at upper course ,filling when water rising ,in falling water stage and at lower course.Further,the deformation of the bottle-neck reach is inobvious when water is rising and reverse when water is falling.

关 键 词：卡口河道 河床演变 澜沧江 

分 类 号：TV135[水利工程—水力学及河流动力学]