摘要
为阐明流入速度和盐水浓度变化情况下,盐水上溯距离及运动速度随之产生的变化,对青年库区河道内盐水上溯特性进行研究,分析河道来流条件及盐度变化对盐水上溯过程的影响。通过在小型概化水槽中模拟青年水库盐水沿河道上溯的过程,进行试验研究。结果表明,在上游来流的限制下,盐水的上溯距离在径流作用下保持稳定,上溯过程受到支流分流的显著影响。由于支流口处来流对盐水的冲击,大部分盐水被冲散并从支流口处流出,少量盐水保持稳定并继续延左岸上溯。随着水深增加,盐水上溯距离对浓度变化的敏感度减小。在相同水深条件下,浓度提高会加快盐水上溯速度,上溯所需的时间越短;而在相同浓度下,水深的增加同样能显著提升盐水的上溯速度。
In order to clarify the changes in the intrusion distance and movement speed of saltwater as the flow velocity and salt concentration change,we carry out a study on the saltwater intrusion characteristics in the riverbed of Qingnian reservoir area,and analyze the influence of river inflow conditions and salinity changes on the saltwater intrusion process.We conduct experimental research by simulating the process of saltwater intrusion along the riverbed in Qingnian reservoir area in a small generalized flume.The results show that under the restriction of upstream flow,the intrusion distance of saltwater remains stable under the action of runoff,and the intrusion process is significantly affected by the tributary diversion.Due to the impact of the upstream flow on saltwater at the branch point,most of the saltwater is dispersed and flows out of the branch point,while a small amount of saltwater remains stable and continues to intrusion along the left bank.As the water depth increases,the sensitivity of the intrusion distance to the concentration change decreases.Under the same water depth condition,the increase in salt concentration will accelerate the intrusion velocity,and the shorter the intrusion time required;under the same concentration condition,the increase in water depth can significantly improve the intrusion velocity of saltwater.
作者
王艳萍
廖江花
许克勤
张鹏
杨胜发
WANG Yanping;LIAO Jianghua;XU Keqin;ZHANG Peng;YANG Shengfa(The College of River and Ocean Engineering,Chongqing Jiaotong University,Chongqing 400074,China)
出处
《水运工程》
2025年第8期146-153,共8页
Port & Waterway Engineering
基金
重庆市教委基金项目(52209080)。
关键词
概化模型试验
盐水上溯
流速影响
浓度影响
conceptual model experiment
saltwater intrusion
flow velocity influence
concentration influence
