THE SURVEY OF PERIPHYTON UTILIZING VERY LOW ALTITUDE REMOTE SENSING TO GRASP THE EFFECT OF ENVIRONMENTAL IMPROVEMENT BY DISCHARGE WATER FROM DAM

Abstract

Recently, the projects to protect natural environment and/or to create a better environment have increased with related various projects. Flexible operation of water discharge of dam is one of these projects. Discharge water from dam could improve the downstream river environments. However, it was difficult to measure its effect quantitatively.
In this paper, the method to grasp the effect of environmental improvement by discharge water from dam was examined. As the result, it is shown that the change of chlorophyll a of periphyton quantitatively is estimated by utilizing the near-infrared color image taken with the very low altitude remote sensing.