Dynamics of Fine Particle Organic Matter at forested watershed - Challenging of New Management of River Environment -

点击翻译按钮获取中文摘要

Particle organic matters is an important feature of the conservation and renovation of an aquatic environment, because of providing the food for bacterias and aquatic insects. Fine Benthic Organic Matters (FBOM), which is sedimented forms of fine particle organic matters exported largely in a flood condition. But the examination of the mechanism of FBOM flushing and sedimentating is not known well. The purpouse of this study is the analysis of the affected factors on the abundance of FBOM on the flood event. The results at upstream of the weir of hydraulic plant show that 1)the fluctuation of the abundance of FBOM were different from FBOM size distribution, 2)the abundance of FBOM were decreased during the water level increasing period, but mostly the abundance of FBOM were increased during the water level decreasing period at the flood event.