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长江流域44条河流水位超警 三峡水库减少出库流量

2017-07-03 04:27:25   新京报

湖南宁乡泥石流致5死4失联

新京报讯(记者王飞翔)记者从长沙市宁乡县宣传部获悉,受连日来持续强降雨影响,7月1日16时左右,宁乡县沩山乡祖塔村(原双龙潭村)王家湾组,因长时间强降雨突发泥石流,致5人死亡,27人受伤,经初步核实,目前除失联的4人外,其余居民已全部疏散,暂无人员被困。

据宁乡县防汛抗旱指挥部消息,截至7月2日7时,沩江宁乡站水位43.71米;沩江上游横市站水位86.62米。黄材水库、田坪水库已经超警戒水位,洞庭水库已接近警戒水位。其中,黄材水库水位最高,已达到167.80米,是黄材水库从1958年筑坝蓄水59年以来的最高水位。

11个乡镇受灾非常严重,由于部分乡镇电力通讯中断,正在抢修中,暂时共有24个乡镇上报灾情,受灾人口355749人,倒塌房屋2300余间,全县23条公路中断。24个乡镇目前全部损失达87514万元。

湖南宁乡县特大暴雨引发泥石流。新华社记者范军威摄

调洪

长江防总调度上中游水库

记者2日从长江防汛抗旱总指挥部防汛会商会上了解到,鉴于长江中下游当前严峻的防汛形势,国家防总与长江防总研究决定进一步调度上中游水库群,拦蓄洪量、减少下泄,为中下游“减负”。

据长江委水文局分析,资水、沅江及修河来水转退,湘江再次上涨,湘潭、资水桃江等站水位仍然超保,长沙等站水位超历史最高,长江流域当前共有44条河流74站水位超警、超保或超历史。“长江2017年第一号洪水”仍在继续发展,预计城陵矶至大通江段水位将全线超警。

根据调度指令,金沙江中游梯级水库、溪洛渡、向家坝、三峡等长江中上游水库群实施联合防洪调度,拦蓄洪水,压减下泄流量,目前长江上游来水已控制在10000立方米每秒左右。

长江防总常务副总指挥、长江委主任魏山忠要求,继续发挥以三峡为核心的上中游水库群的作用,减轻中下游尤其是城陵矶地区的防洪压力。

2日,工作人员在长沙城区湘江沿岸搬运沙袋加固子堤。新华社记者龙弘涛摄

三峡水库持续减少出库流量

为减轻防洪压力,三峡水库7月1日以来持续减少出库流量,截至2日14时,三峡水库出库流量已减至12700立方米每秒,拦蓄长江上游约5成的来水。

为减轻长江中下游防洪压力,长江防总按照《长江流域上中游水库群联合调度方案》,联合调度长江上游水库群和三峡水库拦蓄洪水。三峡水库从7月1日14时起,在上游来水达26000立方米每秒的情况下,将出库流量由25400立方米每秒逐步减至18400立方米每秒,至7月2日14时,出库流量已降至12700立方米每秒。三峡水库上游水位则由1日14时的145.21米升至2日14时的147.88米,24小时增长超过2.5米。与此同时,长江上游溪洛渡、向家坝水库联合运用,日均拦蓄流量2000立方米每秒。雅砻江梯级水库、乌江梯级水库也在拦蓄来水。

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