Abstract In this study, we investigated effectiveness induced by the installation of groynes in river for protection of stream and restoration of ecosystem in Korea. The effect of different designs in groyne including shapes (single-bar type and double –bar type), angles (45° and 135° to the stream flow), and intervals (1 m and 2 m between groynes) on topographic changes were examined in test bed. The topographic changes in different cases were analyzed and compared both qualitatively and semi-quantitatively. More various topographical changes were found in the case with the installation angle of 45°, double-bar type groyne, and 2 m-interval by significant erosion or switching pattern of erosion and deposition along the stream. Comparative analysis results implied that this switching pattern would be the response from properly designed groynes. Based on results from test bed, 13 groynes were installed in the field and topographical changes with biodiversity were observed after installation. As evidences on the effectiveness of groynes, the formation of shallow puddles and increases in number of fishes and invertebrates were observed in the field.

中文翻译：

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溪流设计因素对地形多样化和生态系统恢复的影响

摘要 在这项研究中，我们调查了韩国在河流中安装石斛对河流保护和生态系统恢复的有效性。检查了不同设计对地形变化的影响，包括形状（单杆型和双杆型）、角度（与水流成 45° 和 135°）和间隔（箭杆之间的 1 m 和 2 m）在试验台上。对不同情况下的地形变化进行了定性和半定量分析和比较。安装角为45°、双杆式槽沟、2 m间隔的情况下，由于沿流的侵蚀显着或侵蚀沉积的转换模式，发现了更多的地形变化。比较分析结果表明，这种切换模式将是正确设计的 groynes 的响应。根据试验台的结果，在现场安装了13个groynes，并在安装后观察了地形与生物多样性的变化。在田间观察到浅水坑的形成以及鱼类和无脊椎动物数量的增加，作为证明石斑鱼有效性的证据。