We have developed a "Vegetation Dynamics Model" that can calculate the spatiotemporal changes in vegetation in river channels. This model is based on a two-dimensional riverbed change analysis model that can calculate the river flow and the transport of sand and gravel during floods.

The "Vegetation Dynamics Model" models the invasion, growth, and runoff of vegetation, and can calculate the interactions between river flow, sand and gravel transport, and vegetation during floods.

In river channel management operations, measures are required to lower the water level in the river channel to prevent flooding, and to prevent scouring of the river banks and riverbed, and management of the river channel shape and vegetation in the river channel is a challenge.

To solve this problem, we developed a "Vegetation Dynamics Model" that can predict changes in river channel shape and vegetation within the river channel. Because it models the interactions between river flow, sand and gravel transport, and vegetation, it can calculate conditions that are closer to the real phenomenon than general two-dimensional riverbed change analysis models. Therefore, we believe that this model can be used to evaluate the sustainability of countermeasure effects and to consider river channel maintenance and management plans.

For more details on the "Vegetation Dynamics Model", please see the link below.
https://www.jstage.jst.go.jp/article/river/28/0/28_109/_article/-char/ja/

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■ Contact point regarding model inquiries
Hiroki YOSHITAKE, Water Course Engineering & Water Resources Dept., Land Infrastructure Div.: hiroki.yoshitake@tk.pacific.co.jp
Masashi MINAMI: masashi.minami@ss.pacific.co.jp