The discharge that Manning replaces hydraulic radius with average depth of wate
From;    Author:Stand originally
Summary: Use when reaching section data to use flow of ascertain of graceful peace formula than falling, via commonly used section average depth of water replaces hydraulic radius, bring certain error to calculative discharge achievement. Through the discharge calculative to different figure section the error is analysed, consult " standard of hydrological data reorganize " the concern of water level flow that give out is hydraulic the factor is legal line index -- the regulation that systematic error does not exceed *% , gave out different section appearance can use section average depth of water replaces hydraulic radius to undertake flowmeter...