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摘要：
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| 为探明平陆运河工程对钦江河口盐水入侵的影响，基于MIKE 3三维数值模型，模拟了工程前后枯水期钦江河口盐水入侵过程。结果表明：运河建成后枯水期径流对钦江河口盐水入侵抑制作用占优，盐水入侵距离向上游延伸约5 km，至青年枢纽船闸下引航道。研究模拟了径流对青年船闸减盐效果的影响，当青年枢纽下泄流量超过20 m3/s时，船闸下引航道减盐效果显著；当流量超过60 m3/s时，船闸下引航道盐度可在2天内降至1‰内。 |
| To investigate the impact of the Pinglu canal project on saltwater intrusion in the Qinjiang River estuary, this study employs the MIKE 3 three-dimensional numerical model to simulate the saltwater intrusion process during the dry season before and after the project implementation. The results show that after the completion of the canal, runoff becomes the dominant factor influencing saltwater intrusion in the Qinjiang River estuary during the dry season, with the saltwater intrusion distance extending approximately 5 km upstream, reaching the lower approach channel of the Qingnian Ship Lock. This study also simulates the effect of runoff on salinity reduction at the Qingnian Ship Lock. When the discharge from the Qingnian hub exceeds 20 m3/s, the salinity reduction effect in the lower approach channel becomes significant. When the discharge exceeds 60 m3/s, the salinity in the lower approach channel drops below 1‰ within two days. |
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