Please use this identifier to cite or link to this item: http://hdl.handle.net/2080/4731
Title: Back Analysis of Runout Mechanism of an Ash Pond Failure in India Using HEC-RAS
Authors: Bishwal, Ram Manohar
Kumar, P. S.
Keywords: ash pond
HEC-RAS
Issue Date: Oct-2024
Citation: 92nd Annual Meeting of ICOLD & International symposium on the theme Dams for People, Water, Environment and Development, New Delhi, India, 29th September - 3rd October 2024
Abstract: Assessment of the risk associated with storage and handling of coal-combustion residues such as fly ash and bottom ash in slurry form requires a proper understanding of the flow behaviour of the materials in the event of a breach. Among all possible modes of failure, a breach of such containment facilities is known to cause maximum downstream damages due to its flowable nature and often the presence of a supernatant pond. To estimate the downstream runout and inundation behaviour, this paper presents a case study of an ash dyke failure caused by human error at Reliance Sasan, Singrauli, India on 10 April 2020, where the slurry travelled a distance of about 7 km and contaminated a nearby Rihand river and firm lands. Based on publicly available databases and information from failure investigation reports, the initial breach input parameters estimated through empirical approaches are used to determine the extent of downstream damages caused by the flow of slurry using HEC-RAS 2D sedimentation transportation module as a nonNewtonian Bingham fluid. Through back analysis, the modelled breach parameters such as runout distance, depth of deposition and runout travel time are estimated and compared with the observed values. The results obtained showed similar values, indicating the usefulness of the model to estimate the runout parameters for risk assessment and contingency planning
Description: Copyright belongs to proceeding publisher
URI: http://hdl.handle.net/2080/4731
Appears in Collections:Conference Papers

Files in This Item:
File Description SizeFormat 
2024_ICOLD_RMBishwal_Back.pdf820.35 kBAdobe PDFView/Open    Request a copy


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.