用于非接触式表面测速的江河流量回归计算模型

摘要

Noncontact river lfow measurement is easier to implement and has lower risk due to its less artiifcial participation. Despite of its advantages, however, only surface velocities instead of velocities of a cross section are directly measured, which means the real-time discharge of the cross section of the river cannot be calculated as in those traditional methods. This paper proposes a regression model for calculating river real-time discharge under noncontact measuring condition. The error performance analysis of the model is also presented. Based on the model, the real-time discharge of the river can be calculated with surface velocities, river depth and cross section data provided by noncontact measurement.%非接触式江河测流技术具有不涉水、易实施、人工参与少、危险性低、测量速度快的优点。但非接触式测量只能直接测量河流表面多点的流速，不能像传统的接触式测量技术可以测量河流断面多点流速，从而不能直接测算江河瞬时流量。本文将建立基于表面流速的江河断面流量的回归计算模型，并分析该模型的误差性能。基于此模型，可以通过非接触式测流技术提供的表面流速、河流水位、断面数据在满足误差要求的范围内计算得到河流的瞬时流量。