Hierarchical Framework for Optimizing Wildfire Surveillance and Suppression using Human-Autonomous Teaming

TL;DR

This paper presents a hierarchical framework integrating human and autonomous agents for wildfire surveillance and suppression, significantly improving response efficiency through optimized planning and coordination.

Contribution

It introduces a novel hierarchical multi-agent planning framework that separates surveillance and suppression tasks with different time scales, enhancing wildfire response effectiveness.

Findings

Outperforms existing firefighting techniques by up to 242% in simulations.

Effectively coordinates manned and unmanned aircraft for wildfire management.

Validates early dispatching strategies for suppression assets using regression models.

Abstract

The integration of manned and unmanned aircraft can help improve wildfire response. Wildfire containment failures occur when resources available to first responders, who execute the initial stages of wildfire management referred to as the initial attack, are ineffective or insufficient. Initial attack surveillance and suppression models have linked action spaces and objectives, making their optimization computationally challenging. The initial attack may be formulated as a multi-agent partially observable Markov decision process (MPOMDP). We divide the initial attack MPOMDP into surveillance and suppression processes with their respective planners operating on different, but constant, time scales. A hierarchical framework iterates between surveillance and suppression planners while also providing collision avoidance. This framework is exemplified by a set of multi-rotor unmanned aircraft surveying an initial attack fire while a manned helicopter suppresses the fire with a water bucket. Wildfire-specific solver extensions are formulated to reduce the otherwise vast action spaces. The hierarchical framework outperforms firefighting techniques and a myopic baseline by up to 242% for moderate wildfires and 60% for rapid wildfires when simulated in abstracted and actual case studies. We also validate the early dispatching of additional suppression assets using regression models to ensure wildfire containment to thresholds established by wildfire agencies.