北京密云水库已下泄水量1.2亿立方米|国产精品无码专区av在线播放
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中新社北京7月29日电 北京市气象台29日7时10分降级发布暴雨黄色预警信号。密云水库持续向下游泄流,截至当日6时,已累计下泄水量1.2亿立方米。
受副热带高压边缘暖湿气流等影响,近日北京密云等区发生极端强对流天气。28日12时,北京升级发布暴雨红色预警信号。当日20时,北京市防汛指挥部启动全市防汛一级应急响应,提示市民非必要不外出。
28日傍晚至夜间,北京出现强降雨,房山、大兴、丰台、朝阳、昌平、怀柔和平谷等区的部分地区达暴雨或大暴雨。据北京市气象台统计,7月28日20时至29日10时全市平均降水量72.2毫米,城区平均91.0毫米。
气象部门表示,暴雨黄色和雷电黄色预警中,北京午后仍有分散性雷阵雨,局地短时雨强较大。预计至29日20时,部分地区小时雨强可达50毫米以上,山区及浅山区出现山洪、泥石流、滑坡等次生灾害风险较高,低洼地区可能出现积水。
受强降雨影响,连日来密云水库上游来水量显著增加,截至29日6时,入库水量累计达到7.3亿立方米。密云水库充分发挥拦洪削峰作用,处于超汛限水位运行状态。
7月27日15时以来,密云水库持续向下游泄流,截至29日6时,已累计下泄水量1.2亿立方米。目前,密云水库下泄流量为1120立方米每秒。后续根据水库来水情况,将按照调度规程调整下泄流量。北京水务相关部门正24小时监测河道水位、水库大坝及堤防安全。(完)
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