Evaluation of incipient motion for sediment transport of mining waste rock using critical shear stress analysis
by Dane Morris; Keith Strevett
International Journal of Hydrology Science and Technology (IJHST), Vol. 5, No. 2, 2015

Abstract: There have been concerns that excess sediment load of mining waste rock, also known as chat, into nearby alluvial streams with which have increased flooding risks due to the aggradation and destabilisation of the channel. The goal of this project was to gain a better understanding of the conditions required for fluvial transport and assess the frequency at which those conditions were met. Before this goal could be achieved at field-scale, and the initial objective of determining the critical shear stress required for initiation of fluvial transport of chat, was identified. To determine the critical shear stress required for initiation of transport, a bench-scale laboratory experiment was done in a hydraulic flume with chat collected from an impacted stream viz., Tar Creek, Oklahoma, USA. The empirical critical shear stress required for transport was slightly less than values suggested for general use of sediment transport. This difference is shown to be due to angular characteristics of the chat. The impact of this study and determination of critical shear stress enables the development and calibration of hydraulic and sediment transport modelling of cherty mining waste rock.

Online publication date: Fri, 26-Jun-2015

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

 
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.

Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Hydrology Science and Technology (IJHST):
Login with your Inderscience username and password:

Username:        Password:          Forgotten your password?

Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.

If you still need assistance, please email subs@inderscience.com