Год выпуска: 2014 Автор: Deen Islam Издательство: LAP Lambert Academic Publishing Страниц: 172 ISBN: 9783659547218
Описание
The gravel bed-braided Tenryu River has been selected to understand the interaction between vegetation removal, hydrodynamic parameter and river morphology. Long term trend of vegetation dynamics performed using satellite image and relate those vegetation change with a series of annual maximum flood flow. Less vegetation invasion has been observed before dam construction when peak flood flow occurred. Then, a 2D flood numerical analysis is performed to quantify the parameter responsible for vegetation removal. Bed shear stress and drag moment found suitable to remove plant vegetation within threshold value. The process then further progressed to validate this parameter in a spatial scale. Validation of various years has reported fairly good agreement but still some misjudgments exist. Possible causes of misjudgment hypothesized as absence of sediment transport process in the numerical simulation and some river management activities done by River managers. Then, the effect of sediment...