摘要
针对我国西部地区大比降卵砾石河流的比降和河床组成,采用1m宽水槽对大比降卵砾石河流的输沙率进行分析研究。分析结果表明:(1)水槽试验数据与现有推移质公式对比,比较有代表性的M eyer-peter(1948)、Engelund(1976)两个公式计算的输沙率偏大,与Ackres&W h ite(1973)公式计算值较为接近。(2)根据Ackres&W h ite(1973)的结构形式,补充大比降卵砾石河流泥沙起动条件,假设推移质运动强度与水流有效运动强度成幂次关系,得到大比降卵砾石河流输沙率公式形式。(3)通过水槽试验数据,拟合出适合大比降卵砾石河流的输沙率公式。
In the west China, there are many rivers that are usually characterized by high gradient, coarse sediments, thick pebble and gravel layer, small discharge and shallow water depth during flood season. In this paper, the authors studied the bed-load rate through the following test works in 1m-width flume. （1） The bed-load rates calculated from the formula of Meyer-peter （1948）, Engelund （1976） are more than the experiment data, but that from Ackres ＆ White （1973） was closed to the experiment data. 12） According to the formula mode of Ackres ＆ White （1973）, the authors deduced the bed-load rate formula mode. （3） Based on the experimental data, the authors also fit the bed-load rate formula.
出处
《水动力学研究与进展（A辑）》
CSCD
北大核心
2006年第5期672-678,共7页
Chinese Journal of Hydrodynamics
基金
交通部西部建设重点科技项目"新疆宽浅
变迁性河流桥涵设计关键技术研究"(2001-318-365-88)
关键词
大比降卵砾石河流
推移质输沙率
输沙强度
水流强度
the high gradient gravel river
the bed-load rate
the intensity of the bed-load transport
the flow strength
