河流丰富的地貌形态是河流生物多样性的基础。以河道形态弯曲化为代表的地貌多样性修复是河流生态修复中最受关注的方法，但对河流生态系统的整体恢复效果并不明显。本项目针对河流弯曲化生态修复巨大应用潜力与相关基础理论薄弱之间的矛盾，选择底栖动物为生态指示物，拟以东江、海河流域典型弯曲河流（河段）为研究对象，采用现场试验、室内分析、数值模拟计算等手段开展课题研究。通过对弯曲河流水文地貌过程复杂行为研究，探讨弯曲河流生境异质性和动力学特征，揭示弯曲河流生态作用的物理基础；通过底栖动物对弯曲河流生境变化的动态响应研究，揭示底栖动物对弯曲河流水文地貌结构调整的响应与适应机制；通过对弯曲化生态恢复河流（河段）的监测与评估，系统研究河流弯曲化整治对河流生态系统恢复的效果。本研究将为正在大规模开展的河流生态治理提供新颖的思路和理论依据，为丰富和发展河流生态修复理论做出贡献，具有较高的理论研究意义和工程应用价值。

Human activities have modified the structure of river and stream habitats across the world.Habitat diversification is a common practice used in river restoration efforts to improve the ecological status of streams and rivers,ammong which re-meandering is a favored restoration approach.Stream macroinvertebrates are generally recognized as good indicators of ecosystem health, and the species richness metric is often used to monitor the restoration success.Meanders support a diversity of geomorphic units. Ideally, the meanders echibit complex hydrodynamics that favor high biodiversity.However, comprehensive field studies that provide direct comfirmation are still lacking. In this study, based on the specific hydromorphological characteristics of meanders and the potential applications in river restoration involving channel re-meandering, we select several meandering reaches in Haihe River as the references, and carry out the study by field experiment,theoretical analysis,and numerical modelling.At first, Complex behaviors in hydromorphological process in meandering are to be conducted to exhibit the specific hydro-morphological processes occurring in meanders.Secondly,we study the dynamics of macroinvertebrate responded to habitat dynamics at various spatial and temporal scales, to elaborate the mechanistic interactions between hydromorphological processes, habitat dynamics, and benthic invertebrates distributed at various spatial and temporal scales. And then,a comparative analysis of re-meandering measures and their effects on hydromorphology and benthic macroinvertebrates is to be carried out as the case study. The research will provide the strong technological and theoretical support to river ecological restoration, and make contributions in developing the river ecological restoration theory.