Abstract Continental collision between India and Eurasia plates and associated compression result in the formation of the Tibetan Plateau with a mean elevation of >5000 m. However, how the plateau was formed is still under debate. In this study, by analyzing multiple topographic metrics in the Dadu River drainage basin, eastern Tibetan Plateau, together with previous studies, we attempt to unravel the landscape development there. Our results reveal significant differences in the obtained topographic metrics within the Dadu River drainage basin: higher values of hypsometric integral (HI), normalized stream length gradient (SLK), topographic relief, slope and channel steepness in the middle section of the drainage basin between 29.2° N and 31° N, and lower values in the upper (north of 31° N) and lower sections (south of 29.2° N). Meanwhile, these topographic metrics show a good match with the millennial-scale erosion rates but the long-term exhumation rates contrast between the upper Dadu and the lower Dadu despite similar topographic metric values. We infer that the topographic patterns in the Dadu River drainage basin are related to river capture between the Dadu and Anning Rivers which resulted in the adjustment of the landscape in the middle section of the Dadu River drainage basin with additional incision occurred but not enough to be recorded by low temperature thermochronometric ages.

中文翻译：

---

河流截流对青藏高原东部大渡河流域景观发展的影响

摘要 印度板块与欧亚板块的大陆碰撞及相关压缩形成了平均海拔>5000 m的青藏高原。然而，高原是如何形成的仍然存在争议。在本研究中，通过分析青藏高原东部大渡河流域的多个地形指标，结合以往的研究，我们试图解开那里的景观发展。我们的研究结果揭示了大渡河流域内获得的地形指标的显着差异：流域中段的高水位积分 (HI)、归一化的河流长度梯度 (SLK)、地形起伏、坡度和河道陡度值较高。 29.2° N 和 31° N，以及上部（31° N 以北）和下部（29.2° N 以南）的较低值。同时，这些地形指标显示出与千年尺度侵蚀率的良好匹配，但尽管地形指标值相似，但上大渡和下大渡之间的长期挖掘率却存在差异。我们推断大渡河流域的地形格局与大渡河和安宁河之间的河流捕获有关，导致大渡河流域中段的景观调整，发生了额外的切口但不足以由低温热计时年龄记录。