Accuracy of Computed Water Surface Profiles.
Abstract
Research was performed that investigated the effect of survey technology and accuracy and reliability of hydraulic roughness estimates on the accuracy of computed water surface profiles. The survey technologies studied include field surveys, aerial surveys, and topographic maps as data sources for stream geometry cross-sectional definition. A Monte Carlo simulation strategy was applied to develop an array of computed profile efforts for the survey technologies and selected accuracies, and Manning's coefficient reliability. Ninety-eight natural stream data sets provided the basic data for the study. Comparison of computed base condition profiles and Monte Carlo simulation profiles enabled calculation of mean absolute and maximum absolute errors for each stream reach and error condition. Regression equations were derived for predicting profile errors as a function of survey technology, selected accuracy, Manning's roughness coefficient, and stream hydraulic properties. Keywords: error analysis; regression analysis.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1986
- Accession Number
- ADA176334
Entities
People
- Darryl W. Davis
- Michael W. Burnham