Quantifying Potential Measurement Errors and Uncertainties Associated with Bathymetric Change Analysis.

摘要

This Coastal and Hydraulics Engineering Technical Note (CHETN) describes procedures for quantifying error and uncertainty estimates in volume change calculated from comparison of bathymetric surveys from two different times. Initially, this procedure involves an evaluation of the error budget associated with measurement of bathymetry data from individual surveys. Survey accuracy standards are derived from U.S. Army Corps of Engineers (USACE) and National Ocean Service (NOS) hydrographic survey manuals. Next, uncertainties in bathymetric surface characteristics resulting from topographic irregularities and data density are estimated for each surface. Then, root-mean- square (RMS) variations obtained from a comparison of two surfaces are analyzed to estimate total volumetric uncertainties associated with the modeled change surface.