ABSTRACT
In Taiwan, most of engineers usually designed groundsill and check dam to prevent longitudinal erosion in wild creek. Recently, the local agency and environmental protection groups found out these constructions might be the obstacle in longitudinal corridor of fresh fish. This study uses software of RiverFlow 2D associated with the digital surface model, DSM made from unmanned aerial vehicle, UAV, to provide new management of wild creek by adjusting the top height of groundsill and check dam. Associated with driving UAV to capture aerial photos of creek section and make DSM by Pix4D mapper, the software of RiverFlow 2D produces scour and fill situation of creek bed under the different runoff conditions of recurrence intervals. Hence, this study presents the feasible top height of groundsill and check dams in Geng-fang Nanshih creek located in Northeastern Taiwan.
