Author(s): Yusuke Yamasaki; Yasuo Nihei; Masatake Oozeki
Linked Author(s):
Keywords: Coupled river-lake model; Horizontal coordinate system; Pollutant load; Sediment transport; Lake teganum
Abstract: To perform a computation of water environments in a eutrophied lake with accurately evaluating pollutant loads in influent rivers, we attempt to develop a coupled river-lake model in which a river-flow simulation is employed with a new simplified horizontal coordinate system, named a horizontal sigma coordinate system, recently presented by the authors. We apply the coupled river-lake model to the numerical simulation of flow and sediment transport in Lake Teganuma, one of well-known eutrophied lakes in Japan. The computational results for the suspended sediment concentration in the river and lake give acceptable agreements with those of the observed data, demonstrating the fundamental validity of the present model. It is noteworthy that the spatial distribution of erosion rate of sediments has a key role on an accurate computation of sediment transport in an urban river estuary.
Year: 2005