切割水位法在赤坎水文站推流定线的应用

Application of cutting level method in flow calculation and level-flow relation curve determination at Chikan Hydrologic Station

赤坎水文站下游5 km处有北河桥闸,该站的水位流量关系规律受其调控影响波动较大且难以掌握变化规律。该站2000年以前采用临时曲线法来定线推流,但受北河桥闸调控影响点多且分散,推流定线难度大大增加且难以掌握变化规律,目前主要采用切割水位法对赤坎站水位流量关系进行定线推流。从近10年的整编结果来看,采用切割水位法进行推流所得出的成果与采用临时曲线法所得的成果比较吻合,符合本站的水文特性,资料合理,可供使用。

The level-flow relation curve out of Chikan Hydrologic Station is characterized by significant fluctuation and unclear rule due to control from the Beihe Bridge gate 5km downstream of the station. Temporary curve method was used by Chikan Hydrologic Station before 2000 year, rendering much difficulty and uncertainty. According to last 10 years of records, the results out of cutting level method are basically identical with that out of temporary curve method, conform to the hydrological features of this station, which demonstrate that cutting level method is practicable and is able to contribute reasonable data.