Environmental improvement of eelgrass beds using a submarine cultivation robot

- Realization of stable driving on the seafloor by installation of crawlers-

Abstract

In recent years, the impact of the deterioration of the marine environment on ecosystems has become the problem. One of the causes of water quality deterioration is the hardening of sand and mud on the seafloor. Eelgrass beds, which provide a habitat for young fish, have been decreasing in number due to these effects. In this study, we focused on seabed tillage as a means of improving the hardening of sand and mud on the seafloor and creating an environment conducive to the growth of eelgrass. Currently, large-scale tillage using vessels is the mainstream, and it is not easy for a single organization to perform. This research aims to develop a small-scale subsea tillage robot that can be handled by an individual. Previous research until last year confirmed the rotation of the blades of the submarine tillage robot. However, a problem emerged in the mobility performance. In this report, we describe the process of manufacturing an underwater crawler and confirming its operation in order to improve its mobility.