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被"边缘化"的宁波都市圈？ _ 证券时报网

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从经济实力看，以宁波、舟山和台州2020年GDP粗略计算，宁波都市圈去年的经济总量约1.9万亿元。这一体量当然不小，但同样没有省会城市“带队”的苏锡常都市圈，2020年经济总量已超过4万元，相当于两个宁波都市圈。即便与经济实力相对较弱的合肥都市圈（2020年GDP总额约2.41万亿元）相比，宁波都市圈的经济总量也仅相当于圈内合肥、芜湖、滁州、马鞍山之和。
从核心城市实力看，宁波是副省级市、计划单列市，而且拥有货物吞吐量全球“12连冠”、集装箱吞吐量全球第三的宁波舟山港，《浙江省海洋经济发展“十四五”规划》明确提出“支持宁波建设国际海洋中心城市”。但除此之外，更倾向于“强省会”的浙江，在提及宁波时，更多还是那句熟悉的“唱好杭甬‘双城记’”。
“从现状看，与杭州都市圈、合肥都市圈等� ....

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鱼撞大坝惨剧不再上演长江鱼有了回家"专线"_中国国情_中国网

一年多时间，他们研究了金沙水电站河段收集到的63种鱼类，最后得出流速数据为每秒0.3米至每秒1米。据此，结合河势、大坝阻水等多方面因素，在左岸下游设计了3个鱼道进口，涵盖大多数鱼类的游泳特性。
鱼道建了，还要确保鱼儿“应过尽过”。为帮助少数“迷路”的鱼儿找到正确的路，朱世洪团队在平行于大坝方向的集鱼补水渠内动起了脑筋。
朱世洪介绍，如果集鱼渠比较宽大，补水口垂直于渠体，就会造成仅在出水口有很小流速，而渠内大部分水流没有形成特别流场，引导鱼儿进入作用不大。反复试验论证，团队创新提出，将补水口向鱼儿游动方向倾斜，通过控制补水流速带动渠内整体流速，形成鱼儿喜欢的流场。
此举大大拓展了集鱼范围，增强集鱼效果，还收获了一项国家专利。
金沙水电站水头高20多米，如何在满足鱼 ....

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鱼撞大坝惨剧不再上演长江鱼有了回家"专线"-大河网

　　一年多时间，他们研究了金沙水电站河段收集到的63种鱼类，最后得出流速数据为每秒0.3米至每秒1米。据此，结合河势、大坝阻水等多方面因素，在左岸下游设计了3个鱼道进口，涵盖大多数鱼类的游泳特性。
　　鱼道建了，还要确保鱼儿“应过尽过”。为帮助少数“迷路”的鱼儿找到正确的路，朱世洪团队在平行于大坝方向的集鱼补水渠内动起了脑筋。
　　朱世洪介绍，如果集鱼渠比较宽大，补水口垂直于渠体，就会造成仅在出水口有很小流速，而渠内大部分水流没有形成特别流场，引导鱼儿进入作用不大。反复试验论证，团队创新提出，将补水口向鱼儿游动方向倾斜，通过控制补水流速带动渠内整体流速，形成鱼儿喜欢的流场。
　　此举大大拓展了集鱼范围，增强集鱼效果，还收获了一项国家专利。
　　金沙水电站水头� ....

Yangtze River , China General , South Korea , Hunan Ocean , Guo Sands , Jinsha Sands , Division Hospital , Science Institute , Yangtze River Institute , Office It , Research It , Green Department Do , Researcha Sands , Yangtze River Institute Dean , Cheung Station , Dam Lookout , Channel Yangtze River , Jinsha Cascade , Vietnam Guo Dam , Research It Focus , First Guo , Zhu Introduction Guo , Island Hydro , Yangtze River Water , Supreme Tour , Road Zhu ,

鱼撞大坝的惨剧不再上演长江鱼有了回家"专线"

鱼撞大坝的惨剧不再上演长江鱼有了回家"专线"
chinanews.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from chinanews.com Daily Mail and Mail on Sunday newspapers.

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鱼撞大坝的惨剧不再上演长江鱼有了回家"专线"|水电站|长江_新浪科技_新浪网

鱼撞大坝的惨剧不再上演长江鱼有了回家"专线"|水电站|长江_新浪科技_新浪网
sina.com.cn - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from sina.com.cn Daily Mail and Mail on Sunday newspapers.

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