Successive earthquakes can drive landscape evolution. However, the mechanism and pace with which landscapes respond remain poorly understood. Offset channels in the Carrizo Plain, California, capture the fluvial response to lateral slip on the San Andreas Fault on millennial time scales. We developed and tested a model that quantifies competition between fault slip, which elongates channels, and aggradation, which causes channel infilling and, ultimately, abandonment. Validation of this model supports a transport-limited fluvial response and implies that measurements derived from present-day channel geometry are sufficient to quantify the rate of bedload transport relative to slip rate. Extension of the model identifies the threshold for which persistent change in transport capacity, obliquity in slip, or advected topography results in reorganization of the drainage network.

连续的地震可以推动景观演变。然而，景观响应的机制和速度仍然知之甚少。加利福尼亚州卡里佐平原的偏移河道捕获了千年时间尺度上对圣安德烈亚斯断层横向滑动的河流响应。我们开发并测试了一个模型，该模型可以量化断层滑动（拉长通道）和加积（导致通道填充并最终导致废弃）之间的竞争。该模型的验证支持运输受限的河流响应，并暗示从当今渠道几何得出的测量值足以量化相对于滑移率的床载运输率。模型的扩展确定了运输能力持续变化、滑移倾斜、