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社评“manta1777773kino维语第一集”-梳理天下新闻

黄河宁夏段进入2manta1777773kino维语第一集024—2025年度凌汛期

来源: 网易科技
2024-12-23 14:08:48

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“manta1777773kino维语第一集”黄河宁夏段进入2manta1777773kino维语第一集024—2025年度凌汛期

  中新manta1777773kino维语第一集网石嘴山12月21日电 manta1777773kino维语第一集(记者 于晶)12月20日,宁夏回族自治区水旱灾害防御中心发布信息,20日,黄河宁夏段进入2024—2025年度凌汛期。流凌上首位于石嘴山黄河大桥上游6公里,长度25公里,密度5%—10%,较多年平均晚2天,较2023年晚3天。

  据了解,凌汛是由于下游河道结冰或冰凌积成的冰坝阻塞河道,使河道不畅而引起河水上涨的现象。黄河流经宁夏397公里,一般每年12月中下旬开始出现流凌,次年1月上旬封河,2月中下旬开河。受特殊自然地理条件影响,黄河宁夏段封河时由北向南、先下游后上游;开河时由南向北、先上游后下游,几乎年年发生程度不同的凌汛灾害,其中,长约267公里的平原河段是防凌重点。

  记者了解到,宁夏水利厅与黄委会、应急、气象部门建立了联动报汛机制,及时掌握下河沿、青铜峡、石嘴山水文站水位、流量、水温等数据,研判宁蒙河段流凌、封河发展变化情况;联合黄委现场对黄河沿线工程、在建大桥、在运浮桥的防凌安全进行专项检查,制定了防凌风险隐患排查整改方案,消除凌汛隐患。

  目前,河道内30座重点穿堤建筑物已全部完成封堵,提前拆除2座浮桥;沿黄各地共储备91万方备防石、6万方四角体和价值约1500万元的各类物资,建立抢险队伍25支,落实抢险技术专家93名,做到抢险物资、人员、技术保障到位,并会同内蒙古水利厅共同举办了防凌业务培训班,提升基层责任人履职能力。

  下一阶段,宁夏水利部门将密切关注天气形势和凌情发展变化,滚动分析预报凌汛,强化工程巡查,整治凌汛风险隐患,做好随时应对极端低温天气突发险情和灾情的各项工作,全力保障防凌安全。(完)

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