污水泵站进水管涵流量系数估算

Estimation of Inlet Pipe or Culvert Discharge Coefficient of Wastewater Pumping Station

管道或箱涵(简称管涵)流量系数确定、监测数据选择、欠缺或异常数值处理是排水管渠系统建模中常常面临的问题。作为特例,可首先根据现场监测的泵站出水流量、集水池液位和管涵上游交汇井液位数据确定管涵流量,然后结合沿程水头损失公式确定污水泵站进水管涵流量系数,现场监测数据中,由于传感器灵敏性、信号传输等问题,常常引起数据异常或不连续,应用中应选择质量较好的连续时段数据。少量欠缺或异常值,可采用相邻数据线性插值法修正。对于测试参数相关性较强的情况,可采用相关分析法,由一个参数的数据推断并补充另一参数的缺失或异常数据。按照基本原理和计算步骤,经实例验证,计算的污水泵站进水管涵流量系数认为处于合理取值范围内,达到了预期目标.

Pipe or culvert discharge coefficient determination, monitoring data selection, and missing or abnormal data processing are challenges in drainage system modeling. In special cases, the pipe or culvert discharge can be determined according to the on-site pump effluent rate, sump water level and upstream manhole water level;then, the inlet pipe or culvert discharge coefficient can be determined according to the head loss formula. Sensor sensitivity or signal transmission failures often result in data anomalies or discontinuities, and the application should choose continuous field monitoring data with good quality. Lin ear interpolation method can be used to fill missing data or outliers. When two parameters show strong correlation, correlation analysis can be used to predict the missing or abnonnal data of one parameter from the other. According to the basic principle and calculation steps, through the example analysis, the estimated inlet pipe or culvert discharge coefficient was within a reasonable range, and met the expected goals.