自然復元の川づくりの適用と課題
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概要
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Recently, nature-oriented river works have been much improved through many case studies. There are positive results by using native species of vegetation, and by preserving the habitat of all species in the surrounding environment before urbanization is begun. However, there are some cases of negative results where too many large stones are used or low water channels are filled to arrange artificial meanderings. Therefore, we have to consider the unique characteristics and the ecosystem of the river basins. If we focus only on the technology and forget, the importance of the river-basin environment and its biodiversity, only massive construction will remain. We should clarify the reason why the restoration is needed, the places where the renaturalization is necessary, the significance of such areas for restoration, and the points of view on these issues. In this report, I introduced some references with the knowledge obtained from the studies on the disturbances in ecological systems and on their causes. In particular, I demonstrated the causes of natural and artificial disturbances, and the significance of their classifications. I explained the use of the application of the methods in consideration of the entire river basin instead of using only one particular method of nature-oriented river works. I introduced the examples of the Kissimmee River in America and the Yahagi River in Japan to support the understanding of my view point.
- 前橋工科大学の論文
- 2000-03-25
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