The Error Analysis And Studies On The Discharge Measurement By Hydrological Gauge Boat

This essay makes a thorough inquiry to the causes and limits of the each element affecting the discharge measure when applying the survey boat for the flow test course by the knowledge and means of the hydrology and statistics on the base of the predecessors' studies.Its purpose is putting forward the methods and scope of the error control by the analysis of measurement error of the each element affecting the flow test.In this essay, we also analyse the influence degree of the discharge test on account of the error of the deepth, width and flow velocity adjustment when using the current meter, at the mean time we also analyse the cross section error of type i,type ii,and type iii.We also focuse on the error origin and the calculation way of the beginning distance survey when applying GPS flow-test position locating, and according to the error studies,we raise the permission scope of the measure boat shifting when using the GPS to the great and middle area rivers.At last,we put forward the main factors and control methods of affecting the ADCP testing by the analysis to the ADCP survey errors.