临淮岗复线船闸设计最低通航水位分析

Analysis of design lowest navigable water level of Linhuaigang second ship lock

枢纽的建设及运行会对河道水位形成的物理条件造成影响,并导致设计最低通航水位统计样本出现非一致性,而剔除破坏前的水位序列将导致统计样本代表性不足。以临淮岗复线船闸为例,针对枢纽的建设、运行和非汛期蓄水导致水位样本出现非一致性,综合考虑上游来水变化趋势、人为因素对水位的影响程度、近远期的调度方案以及工程的实际情况,确定设计最低通航水位采用的代表性资料,并计算得到闸上、闸下设计最低通航水位。结果表明,采用2007-2018年水位资料计算出的闸上、闸下设计最低通航水位分别为19.27、17.14 m。

The construction and operation of the hub will affect the formation of physical conditions in the process of water level,and lead to the inconsistency of the statistical samples of the design lowest navigable water level.However,rejecting the water level sequence before damage will lead to the lack of representativeness of the statistical samples.Taking Linhuaigang second ship lock as an example,we aim at the inconsistency of water level samples caused by the construction and operation of the junction and the impoundment in dry season,comprehensively consider the variation trend of upstream water,the influence of human factors on water level,the short-term and long-term operation plans and the actual situation of the project,determine the typical data of calculating the design lowest navigable water level,and obtain the design lowest navigable water levels above and below the gate.The results show that,the design lowest navigable water levels above and below the gate are 19.27 m and 17.14 m,which are calculated by the data from 2007 to 2018.