Landscape evolution constrained by the intraplate stress field: Direct coupling oftectonics and the influence of biota on long-term geomorphic development in the ChileanCoastal Ranges

智利海岸山脉地形的坡度和高程之间的关系从北向南有系统地变化，可以根据生物群的影响来解释，因为它与侵蚀是观测到的植被梯度的函数相一致。因此，该地区提供了一个独特的机会来研究如何为生物群调节景观演化模型。对于该项目，计划使用由奥地利的pi开发的数值模型，该模型允许在机械耦合的可变形网格上对表面过程进行建模。在这个模型中，我们将使用智利海岸山脉的约束良好的板内应力场及其中新世以来的演化作为描述岩石隆升的边界条件。然后，我们代码的地表过程模型将根据观测到的植被梯度进行调制，直到再现观测到的地表隆起和坡度-高程分布。该项目的结果将是一个定量工具（生物群调节侵蚀规律），它描述了在地表过程模型中生物群和构造对侵蚀过程的相对重要性。该项目是应邀（奥地利）加入EarthShape（第2阶段，第5组）的项目，因为：(a)在方案组合中没有智利板内应力场的使用，(b)在德国没有这里使用的数字代码，(c)解决的问题对优先方案至关重要。该项目将持续一年，并将为更长时间运行的整体EarthShape项目提供结果。

The relationship between slope and elevation in the topography of the Chilean Coastal Ranges changes systematically from north to south and may be interpreted in terms of the influence of biota because it is consistent with erosion being a function of the observed vegetation gradient. The region presents therefore a unique opportunity to investigate how landscape evolution models can be modulated for biota. For the project it is planned to use a numerical model developed by PIs in Austria that allows the modelling of surface processes on a mechanically coupled, deformable grid. Within this model we will use the well-constrained intraplate stress field of the Chilean Coastal Ranges and its evolution since the Miocene as boundary conditions to describe rock uplift. The surface process model of our code will then be modulated for the observed vegetation gradient until the observed surface uplift and slope-elevation distributions are reproduced. The result of the project will be a quantitative tool (a biota-modulated erosion law) which describes the relative importance of biota and tectonics on erosion processes in surface process models. The project is an invited (Austrian) addition to EarthShape (Phase 2, cluster 5) because: (a) the use of the Chilean intraplate stress field is missing in the programme portfolio, (b) the numerical code used herein is not available in Germany and (c) the question tackled crucial to the priority programme. The project is laid out for the duration of one year and will provide its results to the substantially longer running overall EarthShape project.