Calculation of Scour Depth at the Parks Highway Bridge on the Tanana River at Nenana, Alaska, Using One-and Two-Dimensional Hydraulic Models

Scientific Investigations Report 2006-5023

U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2006-5023

Table 3. Material types and associated roughness values for the Tanana River at Nenana, Alaska.

[Abbreviations: RMA2, Resource Management Associates; HEC-RAS, Hydrologic Engineering Center River Analysis System; (lb/s)/ft², pound per second per square foot; –, not applicable]

Material type description	RMA2 roughness calibrated from discharge		SMS eddy viscosity [(lb/s)/ft²]	HEC-RAS roughness calibrated from discharge
Material type description	Aug. 17, 1967	Aug. 19, 1998	SMS eddy viscosity [(lb/s)/ft²]	Aug. 17, 1967	Aug. 19, 1998
Tanana River: main channel	0.023	0.015	100	0.0245	0.0245
Tanana River: slough	.040	.022	45	.037	.037
Railroad yard	.045	–	20	.045	–
Bridge abutment	.045	–	20	.045	–
Tanana and Nenana Rivers: bank	.045	–	20	.045	–
Nenana River: main channel	.025	–	75	.026	.026
Logjam at mouth of slough	.110	.016	45	.100	.100

Back to Table of Contents

For more information about USGS activities in Alaska, visit the USGS Alaska Water Science Center home page.

Accessibility FOIA Privacy Policies and Notices

U.S. Department of the Interior | U.S. Geological Survey
Persistent URL: https://pubs.water.usgs.gov/sir200695023
Page Contact Information: Publications Team
Page Last Modified: Thursday, 01-Dec-2016 18:59:26 EST