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1975年8月4日至8日,由于受到第7503号强台风的影响,河南省驻马店地区出现罕见的特大暴雨,主要暴雨中心位于汝河板桥附近的村庄,其强度之大,是我国有纪录以来的最大暴雨,6小时降雨量达到世界最高记录。4日至8日,油房山水库的总降雨量为1411.1毫米,上蔡县的总降雨量为847.5毫米。由于连降暴雨,8月5日傍晚洪河水位开始上涨,7日夜里出现本次暴雨中的最大洪峰,23时30分板桥水库入库流量达13000立方米/
From August 4 to August 8, 1975, due to the typhoon No. 7503, there was a rare heavy rain in the Zhumadian area of Henan Province. The main rainstorm center was located in the village near Ruhe Banqiao. The strength of this area was a record in our country Since the maximum torrential rain, 6-hour rainfall reached the highest record in the world. From April 4 to August 8, the total rainfall of the oil reservoir in Fangshan Reservoir was 1,411.1 mm, and the total rainfall in Shangcai County was 847.5 mm. Due to the continuous downpour, Hong River water level started to rise on the evening of August 5, and the maximum peak in this rainstorm occurred on the night of the 7th. The flow of Banqiao Reservoir reached 23,000 m3 /