摘要
目前，黄河下游引黄灌区的主要问题是渠道泥沙淤积．本文在典型灌区（簸箕李和位山）大量实测水沙资料的基础上，分析了引黄灌区泥沙的起动、含沙量分布和挟沙能力；渠道的糙率、比降、断面形状、来沙组成和引水流量是影响引黄渠道挟沙能力的主要因素；最后根据灌区的实际情况，分析了引黄灌区泥沙淤积的具体成因．本文对如何减少引黄灌区渠道泥沙淤积和分散处理泥沙具有一定的参考价值．
Based on the field data of irrigation system, the incipient velocity of sediment with different sizes, the vertical concentration distribution and the sediment transport capacity are analyzed in this paper. It is revealed that the roughness factor, slope of the canal bed, cross section of the canal and sediment sizes are the important factors which influence the sediment transport capacity of the canal. The main causes of sediment deposition in the irrigation system are given.
出处
《水利学报》
EI
CSCD
北大核心
1997年第7期13-18,共6页
Journal of Hydraulic Engineering
基金
"八五"国家重点科技攻关项目
关键词
起动流速
含沙量分布
泥沙淤泥
泥沙运动
incipient velocity, concentration distribution,sediment deposition.
