南水北调与水利科技2011，Vol.9Issue(6)：1-4,15,5.DOI:10.3724/SP.J.1201.2011.06001
提高渠道糙率率定精度的方法
Improvement of Calibration Precision of Channel Roughness
摘要
Abstract
The calibration of the channel roughness on site is an important subject in hydraulics. Flow rate and water stage measurement inevitably have stochastic errors, so how to reduce the influence of measurement errors on the roughness calibration is a key problem to be solved. On the basis of systematical research on the effects of measurement errors, channel length and backwater on the calibration error, the simplified formula for the channel roughness error was presented. Methods were put forward to decrease the calibration error, including, 1) the same orientation for observed errors of channel water depths, 2) reasonable layout of the channel measured points, 3) gate opening control to reduce the backwater slope, and besides, carrying out calibration in the designed condition or operating with as large volumetric discharges as possible.关键词
渠道/糙率/渠长/雍水/精度Key words
channel/ roughness/ channel length/ backwater/ precision分类
建筑与水利引用本文复制引用
杨开林,汪易森..提高渠道糙率率定精度的方法[J].南水北调与水利科技,2011,9(6):1-4,15,5.基金项目
国务院南水北调工程建设委员会专家委员会重点专项基金项目"南水北调中线工程水力学参数系统辨识关键技术研究"(JGZX-SY2009-11) （JGZX-SY2009-11）
