江の川上流部における治水と環境の調和した河道断面形に関する評価
キーワード:
dimensionless channel width,
Nature Restoration,
Fukuoka’s equation,
river channel planning,
harmonization of flood control and river environment
2011 年 17 巻 p. 137-142
詳細
2011 年 17 巻 p. 137-142
The recent increase in the riren trees in the upstream reach of the Gonokawa River brought deterioration of the river environment by loss of gravel material and loss of water amenity. A project has been undertaken to restore the natural river environment by stabilizing gravel material in the river section in the Gonokawa River.
This paper describes a study of the dynamic stability of planned river section in the project site by applying the Fukuoka equation. The result of the study shows that the Fukuoka equation can express the relationships among characteristics of river cross-section, and dimensionless parameters such as river width, depth, or flow. In the natural restoration project, river cross-section was designed in consideration of the characteristics of stream regime. After the project implementation, it was considered that the river cross-section was approximately consistent with Fukuoka equation.
