Dynamic modeling of vegetation succession and nutrients on frequently flooded sediment bars of modified rivers
Intensive forestation widely occurs in East Asian rivers. It deteriorates the ecosystem of gravelly or sandy bars, affects flood protection, and changes the landscape of the river. For the regulation of forestation and vegetation succession on the bars, a suitable tool, either a numerical simulation model or an empirical knowledge to predict the future process after treatment is required. With this background, a dynamic model is developed to simulate the vegetation process on the bars, based on the empirical knowledge obtained by field observations. Observations were conducted at several Japanese rivers to formulate tools; regarding tree growth and biomass, herbaceous plant biomass, and soil nutrients. The model was successfully applied to Arakawa River at the central part of Japan, to simulate a ten-year process after a major flood. The model was, then, applied to elucidate the forestation mechanism of the bar, indicating the possible reason of the effect of decreasing supply of coarse sediment. The impacts on the tree and herbaceous plants by different hydrological processes are also discussed.
Floodplain nitrogen edaphic factors biomass flooding
Takashi Asaeda Md H.Rashid
Institue for Environmental Science & Technology, Saitama University, Saitama 338-8570, Japan Department of Environmental Science & Technology, Saitama University, Saitama 338-8570, Japan
国际会议
The 3rd Biennial ISRS Symposium Achieving Healthy and Viable Rivers (ISRS)第3届国际河流大会
北京
英文
290-296
2013-08-05（万方平台首次上网日期，不代表论文的发表时间）