TxDOT Research Library - Publication Details

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Title:

Empirical Flow Parameters: A Tool for Hydraulic Model Validity

Report No.:

FHWA/TX-14/0-6654-1

Authors:

by Theodore G. Cleveland [and three others]

Published:

2013

Lubbock, Texas

Texas Tech University. Center for Multidisciplinary Research in Transportation

Type:

Hard copy + Online document

1 volume (166 pages)

Online Access:

https://library.ctr.utexas.edu/hostedpdfs/texastec...

Access Note:

18.8 MB

Summary

Data in Texas from the U.S. Geological Survey (USGS) physical stream flow and channel property measurements for gaging stations in the state of Texas were used to construct relations between observed stream flow, topographic slope, mean section velocity, and several other hydraulic factors, to produce three methods to assess "if hydraulic model results are way off." A generalized additive modeling technique was used to develop two equations, QGAM and VGAM, that estimate discharge and velocity at a location in Texas from a cross sectional flow area, topwidth, location (latitude and longitude), and mean annual precipitation. The data were also analyzed to develop conditional distributions of hydraulic parameters based on location related values to extend the utility of the QGAM and VGAM models. The data and ancillary properties developed in the research were used to develop dimensionless bankfull depth-discharge and similar charts as a way to evaluate anticipated behavior in streams in Texas.

Publ. Place

Lubbock, Texas

Contents

Introduction --
Literature Review [Includes: Resistance Equations -- Energy, Water Surface, and Map Slopes -- Review of Texas Stream Channels] --
Database -- USGS Database -- Gage Station Characteristics -- GIS Database -- The Final Database --
Statistical Approach -- Generalized Additive Models -- Preprocessing and Preliminary Analysis --
Products: Method 1. Regression Analysis --
Products: Method 2. Empirical Distributions --
Products: Method 3. Hydraulic Geometry --
Examples of Product Use --
Examples of Product Use on HEC-RAS Model of Guadalupe Arroyo --
Conclusions --
Appendix A. Evaluation of Main Channel Slope and Proximal Slope for Statistical Regionalization of U.S. Geological Survey Discharge Measurements Associated with Direct-Runoff Conditions in Texas --
Appendix B. Regionalized Ancillary Parameters --
Appendix C. Theoretical V=V(Q) Distributions for Compound Channels

Notes

"August 2013; 13 December 2013"

Study Number

TxDOT Research Project 0-6654

Study Title

Empirical Flow Parameters – A Tool for Hydraulic Model Validity Assessment

Study Sponsor

Lead University

TechMRT