The present work simulated a hypothetical 4D delta-canyon-fan depositional system using stratigraphic forward modelling (SFM) to: 1) investigate the differences and linkages of the sea-level control on the evolution of each sub-environment; 2) explain the evolution under the constraints of sea-level change from the perspective of channel activities.

The SFM approach LECODE applied in this study combines an open-channel flow approach with a non-uniform sediment transport algorithm, with former to simulate water dynamics of turbidity currents and river flows and latter to simulate the transportation, deposition, and erosion of sediments. The input data is calibrated via sensitivity analysis and survey of analogue records. The results are compared with three sets of actual seismic data as verification. After introducing the general characteristics of the model, this study compares the influence of sea-level change on the delta, canyon, and fan, respectively, by analysing stratigraphic framework, the architecture of channel-levee complex, channel distribution and migration, sedimentation/erosion rate, and peak velocity. Moreover, a higher sediment supply case and a lower sediment supply case are compared to test the situation when sediment supply is less dominant. Finally, the influence of sea-level change on channel migration is discussed and the system evolution, especially the canyon evolution, is explained from the view of channel activities.

The results show that sea-level control will be weakened from the delta to the fan via the canyon along with sediment transport. With higher sediment supply, the weakening is stronger. With lower sediment supply, the whole system is more sensitive to the sea-level change and this sensitivity lasts longer. The channel migration is more influenced by local topography, even adjacent topography, rather than sea-level change. The inner bank erosion near the canyon head is directly related to the shelf morphology. The translation and asymmetrical distribution of turbidity channels result in the translation and asymmetrical erosion of canyon bends. The insights extracted from this study could discriminate sea-level control on submarine canyon and fan instead of regarding them as an entirety of ultimate sink in source-to-sink research. Also, the integrated investigation with both qualified perspectives and quantified data could refine sequence stratigraphic concepts and provide a prototype for hydrocarbon exploration on high-sediment-supply river-fed delta-canyon-fan systems.

目前的工作使用地层正演模拟（SFM）模拟了一个假设的4D三角洲-峡谷-扇形沉积系统，以：1）研究海平面控制对每个子环境演变的差异和联系；2）从航道活动的角度解释海平面变化约束下的演化。

在本研究中使用的SFM方法LECODE将明渠流方法与非均匀的泥沙输送算法相结合，前者用于模拟浊流和河水的水动力学，后者用于模拟泥沙的输送，沉积和侵蚀。输入数据通过灵敏度分析和模拟记录调查进行校准。将结果与三组实际地震数据进行比较以验证。在介绍了模型的一般特征之后，本研究通过分析地层框架，河道堤坝结构，河道分布和迁移，沉积/沉积，分别比较了海平面变化对三角洲，峡谷和扇形的影响。腐蚀速率和峰值速度。此外，比较较高的沉积物供应情况和较低的沉积物供应情况，以测试沉积物供应量较少的情况。最后，讨论了海平面变化对河道迁移的影响，并从河道活动的角度解释了系统演化，特别是峡谷演化。

结果表明，随着三角洲到扇形区的泥沙运移，海平面控制将减弱。随着沉积物供应的增加，减弱作用更强。随着沉积物供应量的减少，整个系统对海平面变化更加敏感，并且这种敏感性持续的时间更长。河道迁移更受当地地形，甚至邻近地形的影响，而不是海平面变化的影响。峡谷头附近的内岸侵蚀与架子形态直接相关。浊度通道的平移和不对称分布导致峡谷弯曲的平移和不对称侵蚀。从这项研究中得出的见解可以区分海底峡谷和海扇的海平面控制，而不是将它们视为源到汇研究中最终汇整的整体。也，