Analysis of erosion rate and shear stress based on soil type

Author

Veeraraghavan Krishnan

Abstract

"Erosion is a ubiquitous phenomenon which occurs when shear stress exceeds the forces keeping the particle in place. Shear stress is changed significantly when the flow is changed from its normal conditions by changes in hydrologic conditions. Soil erodibility is an estimate of the ability of soils to erode, based on the physical characteristics of each soil. The resisting force of soil depends on many parameters and the variability of each parameter introduces variations in the erodibility. The determination of erosion potential at selected river reach requires knowledge of flow conditions, soil composition of the cross sections and erosion rate for the soils present in the cross section. The objective of this research is to experimentally determine the erosion vs. shear stress rates which produce the erosion of most common types of soils that are present along the creeks of Metropolitan Saint Louis Sewer District service area.

Samples were collected from banks of creeks using thin-walled shelby tubes which gives practically undisturbed soil sample for the experiments. The experiments were performed in a laboratory recirculating flume, which is designed and constructed at UMR hydraulic laboratory to measure the erosion rates of soil samples. Statistical analyses were performed on the results to obtain the shear stress vs. erosion and critical shear stress values of three soil types"--Abstract, page iii.

Advisor(s)

Morris, Charles Darwin

Committee Member(s)

Cawlfield, Jeffrey D.
Mendoza, Cesar

Department(s)

Civil, Architectural and Environmental Engineering

Degree Name

M.S. in Civil Engineering

Publisher

University of Missouri--Rolla

Publication Date

Summer 2006

Pagination

ix, 84 pages

Note about bibliography

Includes bibliographical references (pages 82-83).

Geographic Coverage

Metropolitan St. Louis Sewer District (Mo.)

Rights

© 2006 Veeraraghavan Krishnan, All rights reserved.

Document Type

Thesis - Restricted Access

File Type

text

Language

English

Subject Headings

Flumes
Metropolitan St. Louis Sewer District (Mo.)
Shear strength of soils -- Measurement
Soil erosion -- Missouri
Soils -- Analysis -- Missouri

Thesis Number

T 9032

Print OCLC #

85892679

Electronic OCLC #

905973401

Link to Catalog Record

Electronic access to the full-text of this document is restricted to Missouri S&T users. Otherwise, request this publication directly from Missouri S&T Library or contact your local library.

Recommended Citation

Krishnan, Veeraraghavan, "Analysis of erosion rate and shear stress based on soil type" (2006). Masters Theses. 5925.
https://scholarsmine.mst.edu/masters_theses/5925