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天然河道行洪时,严格的讲,稳定流是不存在的,但每当顶峰出现的瞬间,涨落率为零,流量近乎不变,此时的水流状态可视作稳定流。把同一测流断面不同时期的峰顶水位与流量组成系列,绘出其关系曲线,即可近似地视为稳定流水位流量关系曲线。依此可进行多年水位流量关系的综合;延长水位流量关系;根据调查洪水位推求洪峰流量;作为水文预报的依据,有时还可作为停测、间测期间推流的依据。笔者采用稳定流水位流量关系曲线法作了十余站的调查洪水推流或验证,取得了较
When the natural river is flooding, strictly speaking, steady flow does not exist, but whenever the peak emerges, the fluctuation rate is zero and the flow is almost unchanged. At this moment, the flow state can be regarded as steady flow. Taking the series of peak water level and flow rate in different periods of the same section, the relation curve can be drawn, which can be approximated as the curve of steady flow level and flow rate. According to this, the relationship between water level and discharge for many years can be comprehensively extended. The relationship between water level and discharge can be prolonged. Flood peak flow can be deduced based on the surveyed flood level. As the basis of hydrological forecast, it may sometimes be used as the basis for the flow during stopping and measuring. I used a steady flow of water flow curve method made more than ten stations to investigate the flood or verification, and made more