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宋庄位于河南唐河支流清水河的上游,控制面积44平方公里。1965年7月9日22时至10日4时,清水河流域平均暴雨300毫米,暴雨中心468毫米。宋庄站水位相应猛涨,至10日2时21分出现最高水位130.72米,超过观测以来最高水位的4.31米(1960年最高水位126.41米),超过测流设备的设计标准1.72米。当时,自记水位井倒坍,测流过河缆索浸没于急流之中,无法操纵;浮标投掷缆索亦被洪水冲跨,暴风骤雨浇熄了夜明浮标。此次洪水流量无法施测,只得打临时水尺桩,观读水位,事后补测了洪水迹比降和大断面。这次洪水刚过,7月14日1时45分又发生了一次较大的洪水,洪峰水位128.00米。这一洪岭的测流次数较多,在127.69米水位级以下都有测点。故1965年的水位～流量关系曲线需要延长的幅度有3.03米。相当于实测水位变幅的50％。下面谈谈我们估算这次洪水的最大流量的方法。
Songzhuang is located in the upper reaches of Qingshuihe, a tributary of the Tanghe River in Henan Province, with a control area of 44 square kilometers. At 22:00 on July 9, 1965, at 4:00 on the 10th, the average rainfall of the Qingshui River Basin was 300 mm and the center of the heavy rain was 468 mm. Songzhuang station water level soared to 21:10 on the 10th of the highest water level of 130.72 meters, exceeding the highest level since the observation of 4.31 meters (1960 maximum water level of 126.41 meters), exceeding the flow measurement equipment design standards 1.72 meters. At that time, self-remembered water wells collapsed, measuring the river cable immersed in the rapids, can not be manipulated; buoy throwing cable was also washed floods, storm dazzled night buoy. The flood flow can not be measured, had to hit the temporary water feet pile, read the water level, afterwards measured the flood mark than the drop and the large cross-section. The flood just passed, and at 14:45 on July 14, a major flood occurred again. The peak water level reached 128.00 meters. This Hongling has a larger number of flow measurements, with measurement points below 127.69 meters. Therefore, the 1965 water level ~ flow curve needs to be extended by 3.03 meters. Equivalent to 50% of the measured water amplitude. Let’s talk about how we estimate the maximum flow of this flood.