ABSTRACT
Present research work deals with the variation of stream power curve to divide the characteristics of the fluvial river in different temporal and spatial scale and discuss the effect of vegetation roots on fluvial evolution in the riparian zone with low stream power. The research content is divided into three main parts. The first part is analyzing the stream power. In this part, we will collect the information of twenty-four central Taiwan rivers including aerial photographs, topography, discharge, and precipitation data to draw the stream power curve of fluvial rivers in Taiwan. Then, we will discuss about the river characteristics in ascending, transitional, and descending sections of the stream power curve. The second part is an investigation of vegetation type. Using field investigations, we will observe the vegetation type in the low stream power zone of upstream, midstream, and downstream and consider the effect of vegetation roots on the fluvial river in low stream power zone, based on dominant formative discharge, of longitudinal and horizontal directions. The third part is flume experiments in the laboratory. The advantages of easy observing and control flume experiments are used to further realize the effect of vegetation roots on the fluvial evolution in low stream power zone. Furthermore, we will observe the effect of vegetation roots of deposition and erosion resistance to quantify the contribution of vegetation roots on sediment transport by flume experiments.
