Abstract
Most rivers in Japan have currently accelerated vegetation growth due to human interventions, e.g., dams and weirs. Such accelerated growth resulted in reduced habitat heterogeneity, gravel riverbed, and flood conveying capacity by increased flood water stages, etc. Even though some models were developed to quantitatively analyze herbaceous-plant and woody succession, they have only introduced vegetative growth rates statically as a function of their flood levels but not addressed its dynamic succession processes. Firstly, we developed a numerical model for herbaceous-plant and woody succession that integrates soil nutrient and morphological processes. Secondly, we selected, as a research field, a middle reach of the Sagami River and analyzed spatiotemporal patterns of vegetative succession and morphological processes. Thirdly, we verified and showed applicability of the developed model.
