ABSTRACT

Complex mountain geodynamics are difficult to decouple due to forcing factors, feedback mechanisms, and system couplings that arise from interacting atmospheric, surface, and tectonic processes. The operational-scale dependencies and process–form relationships that govern the spatio-temporal extent of process regimes, which in turn govern relief production, have yet to be adequately characterized and mapped. This research establishes a topographic morphological structural framework for representing and querying the spatial organizational structure of the topography that governs, and is governed by mountain geodynamics. The spatial scale-dependent structure of the topography is accounted for using land-surface parameters and land-surface partitioning into distinct terrain units that represent important aspects of the geomorphological system. The properties and spatial topology of terrain units provide constraints for modeling process–form relationships, which are represented as process–form indices and synthesized using logistic regression to empirically detect glacial and bedrock river incision process regimes at the basin-scale for 31 basins in the Central Karakoram at about 80% accuracy. The topographic morphological structural framework approach provides a mechanism for tractable representation of scale-dependent topographic structure for automated characterization of the land surface, providing insight into polygenetic geomorphological systems and systems coupling through defined process–form relationships.

摘要

由于相互作用的大气、地表和构造过程引起的强迫因素、反馈机制和系统耦合，复杂的山地地球动力学很难解耦。控制过程机制的时空范围的操作规模依赖性和过程-形式关系，进而控制救济生产，尚未得到充分的表征和映射。本研究建立了一个地形形态学结构框架，用于表示和查询地形的空间组织结构，该地形支配并受山地地球动力学支配。地形的空间尺度相关结构是使用地表参数和地表划分为代表地貌系统重要方面的不同地形单元来解释的。地形单元的属性和空间拓扑为过程-形式关系建模提供了约束条件，这些关系表示为过程-形式指数，并使用逻辑回归进行综合，以实证检测 31 个盆地盆地尺度的冰川和基岩河流切割过程机制中央喀喇昆仑山脉的准确率约为 80%。地形形态结构框架方法提供了一种机制，用于自动表征陆地表面的尺度相关地形结构的易处理表示，提供对多基因地貌系统和通过定义的过程-形式关系耦合的系统的洞察。其表示为过程-形式指数，并使用逻辑回归进行综合，以经验性地检测喀喇昆仑中部 31 个盆地盆地尺度的冰川和基岩河流切割过程状态，准确率约为 80%。地形形态结构框架方法提供了一种机制，用于自动表征陆地表面的尺度相关地形结构的易处理表示，提供对多基因地貌系统和通过定义的过程-形式关系耦合的系统的洞察。其表示为过程-形式指数，并使用逻辑回归进行综合，以经验性地检测喀喇昆仑中部 31 个盆地盆地尺度的冰川和基岩河流切割过程状态，准确率约为 80%。地形形态结构框架方法提供了一种机制，用于自动表征陆地表面的尺度相关地形结构的易处理表示，提供对多基因地貌系统和通过定义的过程-形式关系耦合的系统的洞察。