西、北江三角洲李家沙水道的分流特性研究

Characteristics of Division Flow of Lijiasha Waterway in the West and North River Delta

在分析李家沙水道近期演变和分流特性的基础上 ,利用实测和试验资料 ,研究了李家沙水道近年来的变化原因 ,并建立了李家沙水道分流量与上游径流流量、分流区河势特征之间的关系式 .研究表明 :近几年顺德水道演变、人类活动加剧和原来特定河势的共同作用 ,使李家沙水道呈现径流量增大、河床冲刷加剧的趋势 ,该趋势与西、北江水系的演变特性是一致的 .

In recent years, the coaction of evolution of the Shunde waterway, human activity and original river pattern has increased the runoff of the Lijiasha waterway and has made the channel scouring more serious. The trend is the same as that of the evolution of the West and North river system. Based on the observed data,the relations between the Lijiasha waterway runoff, upstream runoff and river pattern characteristics in the bypass region are established.