2026-02-18 土木研究所,鳥取大学,山梨大学
図-1 一般的な川づくりとGDを活用した川づくりの設計プロセス．
赤字はそれぞれのプロセスの特徴を記載している．
＜関連情報＞
- https://www.pwri.go.jp/jpn/about/pr/press-release/2026/0218/index.html
- https://link.springer.com/article/10.1007/s11355-025-00698-x
ジェネレーティブデザインに基づく河川断面の半自動設計システム Semiautomatic design system for river channel cross-sections based on generative design
Takanori Kono,Kazuaki Ohtsuki,Kazufumi Hayashida & Keigo Nakamura
Landscape and Ecological Engineering Published:06 January 2026
DOI:https://doi.org/10.1007/s11355-025-00698-x
Abstract
A semiautomatic design system for river channel cross-sections is proposed that applies the concept of generative design to nature-oriented river management. The system processes a single representative cross-section of the current reach to generate multiple trapezoidal cross-sections according to the prescribed design parameters and in situ requirements. The cross-sections are then evaluated for flood safety, environmental diversity, and constructability by one-dimensional nonuniform hydraulic simulations, riffle-pool sequence segmentation, and soil volume cutting. As a case study, the design system was applied to two rural rivers with different hydraulic characteristics. The design system took approximately 20 s to generate 100 cross-sections for each river, and the many options and indices helped with the unbiased selection of a reasonable cross-section. The most suitable cross-sections corresponded to those identified by previously developed empirical river restoration methods. For both rivers, the optimal cross-sections differed when the soil volume was considered. The proposed design system is expected to improve the efficiency and effectiveness of river channel design in the context of nature-oriented river management.
