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引用本文:宋秋英,赵德芳,马英,等.依据上下游水位差插补雷达测流数据的试验研究[J].灌溉排水学报,,():-.
SONG Qiuying,ZHAO Defang,MA Ying,et al.依据上下游水位差插补雷达测流数据的试验研究[J].灌溉排水学报,,():-.
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依据上下游水位差插补雷达测流数据的试验研究
宋秋英1, 赵德芳2, 马英3, 刘恩民3
1.齐河县水利局;2.德州市陵城区水利局;3.中国科学院地理科学与资源研究所
摘要:
【目的】解决多普勒雷达探头在灌区测流低流速情况下误差较大的问题。【方法】用断面测流方法测得流量及断面水深,同时采用高精度压力水位传感器测量上下游水位高程,对流量-水位高程差进行回归拟合。【结果】不同流速下水位高程差与流量均呈二次函数关系且相关性高,水位差-断面水深-流量是复相关关系;流速正常情况下对雷达所测流量-水位差关系按二次函数曲线进行回归拟合,R2值为0.981;将水位差与相对水深的乘积作为驱动因子,与流量建立关系得到二次函数曲线,R2值为0.9923。因此,不同水深时的水位差-流量数据均可用来建立关系式,用于低流速时估算流量,以弥补雷达测流的缺陷。
关键词:  多普勒雷达测流;启动流速;水位差;流量
DOI:
分类号:S275
基金项目:
Experimental study of interpolation of radar flow measurement data based on upstream and downstream water level differences
SONG Qiuying1, ZHAO Defang2, MA Ying3, liu enmin3
1.Qihe Bureau of water resources;2.Lingcheng Bureau of water resources;3.Institute of Geographic Sciences and Natural Resources Research, CAS
Abstract:
【Objective】To solve the large error problem of Doppler radar probelm in the case of low flow velocity measurement in irrigation area.【Method】The discharge and depth of section were measured by sectional flow measurement. At the same time, a high-precision pressure and water level sensor was used to measure upstream and downstream water level elevation, and the flow-water level difference was regression fitted.【Result】Water level elevation difference and discharge at different flow rates are quadratic and highly correlated, water level difference - section depth - discharge is a complex correlation; the relationship between water level difference and discharge measured by radar at normal flow rates is fitted to a quadratic function curve, R2 value of 0.981; the product of water level difference and relative water depth as a driving factor, and the discharge to establish a relationship to obtain the quadratic function curve, R2 value of 0.9923.【Conclusion】Therefore, the water level difference and discharge data at different depths can be used to establish a relationship for estimating the discharge at low velocities, so as to compensate for the shortcomings of radar flow measurement.
Key words:  Doppler radar flow measurement; Starting velocity; Water level difference; Discharge