STUDY ON MANAGEMENT OF VEGETATIONS USING EXTENDED QUASI TWO-DIMENSIONAL ANALYSIS IN THE OONO AND OTOTSU RIVER

The management of the vegetation in the Oono and Ototsu River were examined using extended quasi 2D simulations. Firstly, the relation between the boundary mixing coefficients f and vegetation density in the Oono River is examined through comparison of numerical results between quasi 2D and 2D simulations. From the relation, a value of f is found to be 0.11 in the Oono River. And the effects of deforestation to the boundary mixing coefficient f were also examined. It showed that deforestation is not effected significantly on the value of f in the Oono River. Finally, management map of the vegetation in the Oono and Ototsu River was made using extended quasi 2D analysis.