求翻译：富流滩电航工程位于渠江下游广安市岳池县罗渡镇河段，是渠江航道四川段七级航运梯级规划自上而下的最后一级梯级，上游与四九滩电站尾水衔接，下游尾水与嘉陵江草街航电枢纽回水重叠。工程开发任务以发电为主，结合航运。是什么意思？

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Electric air flow and beach River drainage works is located in the city and county to pool, river town, it is the drainage river channels 4, 7 paragraph at the top-down planning shipping rung last rung, upstream and 49 power plants, tail water downstream tail water interface with Jialing River grass

The rich class beach electricity navigation project is located the Qu Jiang downstream Quangyen city Yuechi County Luoduzhen section of river, is the Qu Jiang route Sichuan section seven level of shipping stave plan top-down final level stave, upstream with 49 beach power plant tailwater engagement,

Streaming Beach-rich navigation project in Qujiang guangan city Yuechi County-Romanian in the lower town, river-crossing, is Qujiang channel seven-ship flight plan from top of last paragraph in Sichuan province-level cascade, converge with the 49 Beach Station tail water in the upper reaches, the lo

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