Parallelization of the TRIGRS model for rainfall-induced landslides using the message passing interface

Environmental Modelling and Software
By:  and 

Links

Abstract

We describe a parallel implementation of TRIGRS, the Transient Rainfall Infiltration and Grid-Based Regional Slope-Stability Model for the timing and distribution of rainfall-induced shallow landslides. We have parallelized the four time-demanding execution modes of TRIGRS, namely both the saturated and unsaturated model with finite and infinite soil depth options, within the Message Passing Interface framework. In addition to new features of the code, we outline details of the parallel implementation and show the performance gain with respect to the serial code. Results are obtained both on commercial hardware and on a high-performance multi-node machine, showing the different limits of applicability of the new code. We also discuss the implications for the application of the model on large-scale areas and as a tool for real-time landslide hazard monitoring.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Parallelization of the TRIGRS model for rainfall-induced landslides using the message passing interface
Series title Environmental Modelling and Software
DOI 10.1016/j.envsoft.2016.04.002
Volume 81
Year Published 2016
Language English
Publisher Elsevier
Contributing office(s) Geologic Hazards Science Center
Description 14 p.
First page 122
Last page 135