【摘要】：受超強厄爾尼諾事件影響,2016年6~7月西太平洋副熱帶高壓偏強偏西,導(dǎo)致長江梅雨期降雨異常偏多、暴雨頻發(fā),中下游地區(qū)發(fā)生了3場區(qū)域性大洪水。通過干支流控制性水文站和水利工程的觀測資料,還原出天然來水量過程,統(tǒng)計了洪峰流量和不同時段洪量,結(jié)合現(xiàn)有歷史洪水資料和工程設(shè)計成果,分析了2016年洪水特征和重現(xiàn)期。分析結(jié)果表明,宜昌以下干流河段均出現(xiàn)超警戒水位,洪水重現(xiàn)期在5~10 a之間;清江、資水、水陽江、鄂東北諸支流等發(fā)生特大洪水,水位、流量超過歷史最高紀(jì)錄,重現(xiàn)期為100~200 a一遇;修水、饒河等發(fā)生一般洪水,重現(xiàn)期在20 a一遇以下。
[Abstract]:Affected by the super El Nino event, the subtropical high in the western Pacific from June to July 2016 was stronger to the west, resulting in abnormal rainfall and frequent rainstorm in the Meiyu period of the Yangtze River, and three regional floods occurred in the middle and lower reaches of the Yangtze River. Based on the observation data of main tributary controlled hydrologic station and water conservancy project, the process of natural incoming water is restored, and the flow rate of Hong Feng and flood volume in different periods are counted, combined with the existing historical flood data and engineering design results. The flood characteristics and recurrence period in 2016 are analyzed. The analysis results show that the overwarning water level appears in the reach of the main stream below Yichang, and the flood recurrence period is between 5 and 10 years. Severe floods occurred in Qingjiang River, Zishui River, Shuiyang River, Northeast Hubei tributaries, the water level and discharge exceeded the historical record, the recurrence period was 100 鈮，

本文編號：2486005