结雅河对黑龙江上马厂水位的顶托效应分析

结雅河是黑龙江左岸的重要支流,对交汇口上游的黑龙江上马厂河段水位的影响极为重要,但对上马厂站水位影响的条件和强度目前尚无定量分析结果。通过实测资料分析,确定了上马厂站水位受到结雅河顶托的必要条件是汇合后的总流量不小于9 000 m~3/s。在1988年至2008年期间,受结雅河顶托影响,上马厂水位抬高介于0.27 m到0.82 m。数学模型计算结果表明,对于上马厂较大洪水流量,当结雅河汇流比由0.03增至0.24或0.30时,上马厂站水位可抬高约0.77 m或1.43 m。

Influence on water level at Shangmachang Hydrological Station at the Heilongjiang River caused by backwater of Zeya River

Zeya River,an important tributary of Heilongjiang River,impacts frequently on the water levels upstream of the confluence area in Heilongjiang River.Currently,the requirement for Zeya River to affect the water levels of Shangmachang Station and the influence intensity are still need to be investigated.In this study,it was confirmed that a requirement for Zeya River to affect the water levels of Shangmachang station is that the confluent flow rate should not be less than 9000m3/s by analyzing the field data.During 1998 to 2008,the water levels at the Shangmachang Station were raised about 0.27m to 0.82m by the backwater influences by Zeya River.Results based on the numerical model calculation show that the water level at Shangmachang Station will raise by 0.77m or 1.43m with the increasing of the Zeya River's confluence ratio from 0.03 to 0.24 or 0.30 under the condition of large floods at the Shangmachang Station.