Groynes have been used for the stabilization of banks and for creating a navigation channel by confining the cross-sectional area, especially for large European and Japanese rivers. Therefore, turbulent flows and transport phenomena in groyne fields have paid attention to the appropriate design for bank protection and obtainment of enough depth in the main channel as well as the proper environment for ecosystems.
In the case of oil spill accident on the ocean, it is very important to proceed the appropriate recovery work for the minimization of environmental damage. We have developed a new airborne remote sensing tool for the detection and monitoring of oil spill to support the oil spill prevention.