南水北调与水利科技2016，Vol.14Issue(6)：96-104,9.DOI:10.13476/j.cnki.nsbdqk.2016.06.017
长距离调水明渠冬季输水冰情分析与安全调度
Ice regime analysis and safe dispatch research on long distance water diversion project in winter
摘要
Abstract
The paper analyzed the temporal and spatial distribution characteristics of ice regime and ice thickness ,with ice regime prototype observation data at South‐to‐North Water Diversion Middle Route Project in 5 winters during 2011 -2016 .In the winter of 2015 to 2016 ,ice jam occurred in local canal ,because of large discharge ,0 .25~0 .67 m/s flow velocity and cold air (-18 .6 ℃) .Combined with the dispatching mode of constant water level in front of the gate and canal pool flow characteristics , water control condition was proposed to avoid the formation of ice jam disaster .The upstream section of canal pool should be controlled with V ≤0 .40 m/s ,Fr≤0 .065 .the downstream section should be controlled with V ≤0 .35 m/s ,Fr≤0 .055 .It was recommended to increase the full line of ice regime observation and collect more ice observation data ,in order to set up scientific basis to optimize the water supply operation scheduling and ice regime forecast in winter .关键词
长距离调水工程/冰情/冰塞/立封/冰厚/断面流速/弗劳德数Key words
long distance water diversion/ice regime/ice jam/packed freeze-up/ice thickness/cross section velocity/Froude number分类
水利科学引用本文复制引用
段文刚,黄国兵,杨金波,刘孟凯..长距离调水明渠冬季输水冰情分析与安全调度[J].南水北调与水利科技,2016,14(6):96-104,9.
