长江上游寸滩站卵石推移质输沙规律研究  

Study on gravel bed load transport laws at Cuntan Station in upper Yangtze River

作　　者：魏丽[1] 汪鹏 卢金友[1] 

机构地区：[1]长江科学院河流所,湖北武汉430010 [2]长江水利委员会规划计划局,湖北武汉430010

出　　处：《人民长江》2010年第15期83-86,共4页Yangtze River

基　　金：国家自然科学基金资助(50879006);"十一五"国家科技支撑项目(2006BAB05B02)

摘　　要：以长江上游寸滩水文站14 a实测的卵石推移质输沙率资料为基础,对常见的卵石起动和输沙率公式进行验证。计算结果发现:各公式精度不高,不能准确反映寸滩站卵石推移质输沙规律。对实测资料进行分析整理,引入了以卵石粒径本身为变量的系数,建立了卵石起动流速公式,并对以流速为主要参数的推移质输沙率公式进行修正,建立了适合寸滩站的卵石推移质输沙率公式。验证结果表明所提出的公式具有较好的精度。The verification of common gravel bed load incipient velocity formulae and transport rate formulae is carried out based on 14-year field data of gravel bed load transport at Cuntan Station.The results show that the precisions of those formulae are low,which can not reflect gravel bed load transport at Cuntan Station.After analyzing and sorting the measured data,the gravel bed load incipient velocity formula is deduced by introducing gravel grain size as variable coefficient and the transport rate formula suitable for Cuntan Station is established by modification of bed load transport rate formula using velocity as main coefficient.It is shown that the two proposed formulae have high precisions.

关 键 词：卵石推移质 起动流速 输沙率 寸滩站 

分 类 号：TV142.2[水利工程—水力学及河流动力学]