Debris-Flow Fans

泥石流对山区的生命和建筑物构成危险 世界各地的社区。 出于需要， 加强预测和缓解，研究项目， 特别是在美国和日本， 关于泥石流的发生和动力学的信息。 通过 相比之下，很少有研究致力于了解 泥石流在其潜在危险的环境中， 最严重：即，关于泥石流的风扇。 泥石流扇形成了 大部分的景观，除了关注 关于危险，缺乏对过程的严格研究 形成泥石流扇代表了科学的基本缺乏， 关于地球表面主要地形的知识。 的 拟议的研究将解决形成的机制， 泥石流扇 这项研究补充了正在进行的泥石流 在这个国家和东亚的监测项目， 将开发一种方法来解释大量的 有关泥石流和风扇形成的资料储存在 泥石流沉积物本身。 我们的方法认为， 泥石流形成的过程和控制， 输送，以及与风扇表面的通道的相互作用， 首先是地质和气候条件， 源区及其对流动性、体积和 发生的频率。 这是一种普遍的做法， 适用于各种环境，而不限于 所选田间研究地点的具体条件：欧文斯谷， 约 该模型将围绕以下流变学描述建立： 泥石流动力学，并将基于现场和实验室 数据

Debris flows pose a hazard to lives and structures in mountain communities throughout the world. Motivated by the need to enhance prediction and mitigation, research projects, particularly in the U.S. and Japan, have produced wealth of information on initiation and dynamics of debris flows. By comparison, little research has been devoted to understanding debris flows in the environment where their hazard potential is most serious: i.e., on debris-flow fans. Debris-flow fans form a significant portion of the landscape and aside from concerns about hazards, the dearth of rigorous studies of the processes forming debris-flow fans represents a basic lack of scientific knowledge about a major landform of Earth's surface. The proposed research will address the mechanics of formation of debris-flow fans. The study complements on-going debris-flow monitoring programs in this country and in East Asia in that we will develop a methodology for interpreting the vast amounts of information on debris flows and fan formation stored in the debris-flow deposits themselves. Our approach considers the processes of, and controls on, debris-flow initiation, conveyance, and interaction with the channels of the fan surface, starting with the lithologic and climatic conditions in the source area and their influence on flow mobility, volume, and frequency of occurrence. The approach is a general one, applicable in a range of environments, and not limited to the specific conditions in the chosen field study site: Owens Valley, CA. The model will be built around an rheological description of debris-flow dynamics and will be based on field and laboratory data.