Strategic study on ecohydraulic properties of overgrown vegetation on floodplain aiming at sustainable river management

为了研究漫滩植被的生态水力学特性，在3个试验河段进行了植被覆盖河道的野外调查和洪水流量分析。 试验河段的选择，使河流恢复和人工排污控制对植被过度生长的影响进行了单独评价。除了洪水流量和植被行为的探测测量外，还使用无线电控制小型直升机（猎鹰-PARS）进行了航空摄影测量。 数十年之久的植被动态成功地分析了水动力学和生态模型，这是通过比较几次洪水事件后收集的现场数据进行验证。研究了河流恢复和流量控制对植被覆盖河段水动力学的影响。 其结果是提供一个指导方针，可持续河流管理战略，以最少的劳动力和成本。

In order to investigate ecohydraulic properties of overgrown vegetation on floodplain, field studies and flood flow analysis were performed in three test reaches of vegetated river channel. The test reaches were chosen so that effects of river restoration and artificial discharge control on vegetation overgrowth were individually evaluated. In addition to the probe measurements of flood flow and vegetation behaviors, aerial photographic surveying was carried out by using a radio control mini-helicopter (falcon-PARS). Decades-long vegetation dynamics were successfully analyzed by hydrodynamic and ecological models, which were verified through comparison with the field data collected after several flood events. It was found how river restoration and discharge control affect ecohydrodynamics of vegetated river reach. The result is to provide a guideline for a sustainable river management strategy with minimum labor and cost.