Long term evolution model of delta

The evolution of natural delta morphology is controlled by river flow and sediment process and human activities, and its morphological characteristics in turn affect the upstream river morphology and ecological environment. The current research has made clear that the changes of river flow, sediment concentration and sediment gradation have an important impact on the evolution of delta morphology, but there is still a lack of clear understanding of the long-term cumulative effect of river morphology adjustment on Delta development. This study focuses on the long-scale evolution process of River Delta under runoff and tide dynamics. Based on Delft 3D software, a coupling generalized model of hydrodynamic sediment transport topographic change is constructed to explore the influence of channel section morphology on the evolution process and morphological pattern development of rivers and deltas entering the sea. This data is based on the long-time scale dynamic geomorphic numerical model of the characteristic river channel with a width of 1000m and a depth of 6m. It provides the basis for the analysis and discussion of the article.天然三角洲地貌的演化受河流水沙过程与人类活动共同调控，而其地貌特征反过来又会对上游河道形态与生态环境产生影响。现有研究已明确，河流流量、泥沙浓度与泥沙级配的变化对三角洲地貌演化具有重要影响，但目前对于河道形态调整对三角洲发育的长期累积效应，仍缺乏清晰认知。本研究聚焦径流与潮汐动力作用下三角洲的长周期演化过程，基于Delft 3D软件构建了水动力-泥沙输运-地形变化耦合通用模型，以探究河道断面形态对入海河流及三角洲演化过程与地貌格局发育的影响。本数据集基于宽1000米、深6米的典型河道长周期动态地貌数值模型构建，可为本文的分析与讨论提供支撑。